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/6.4/sys/dev/acpica/acpi.c 173482 2007-11-08 21:22:20Z njl $");
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 static int acpi_susp_bounce;
246 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
247 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
248
249 /*
250 * ACPI can only be loaded as a module by the loader; activating it after
251 * system bootstrap time is not useful, and can be fatal to the system.
252 * It also cannot be unloaded, since the entire system bus heirarchy hangs
253 * off it.
254 */
255 static int
256 acpi_modevent(struct module *mod, int event, void *junk)
257 {
258 switch (event) {
259 case MOD_LOAD:
260 if (!cold) {
261 printf("The ACPI driver cannot be loaded after boot.\n");
262 return (EPERM);
263 }
264 break;
265 case MOD_UNLOAD:
266 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
267 return (EBUSY);
268 break;
269 default:
270 break;
271 }
272 return (0);
273 }
274
275 /*
276 * Perform early initialization.
277 */
278 ACPI_STATUS
279 acpi_Startup(void)
280 {
281 static int started = 0;
282 int error, val;
283
284 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
285
286 /* Only run the startup code once. The MADT driver also calls this. */
287 if (started)
288 return_VALUE (0);
289 started = 1;
290
291 /* Initialise the ACPI mutex */
292 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
293
294 /*
295 * Set the globals from our tunables. This is needed because ACPI-CA
296 * uses UINT8 for some values and we have no tunable_byte.
297 */
298 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods;
299 AcpiGbl_EnableInterpreterSlack = TRUE;
300
301 /* Start up the ACPI CA subsystem. */
302 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
303 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
304 return_VALUE (error);
305 }
306
307 if (ACPI_FAILURE(error = AcpiLoadTables())) {
308 printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
309 AcpiTerminate();
310 return_VALUE (error);
311 }
312
313 /* Set up any quirks we have for this system. */
314 if (acpi_quirks == 0)
315 acpi_table_quirks(&acpi_quirks);
316
317 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
318 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
319 acpi_quirks &= ~ACPI_Q_BROKEN;
320 if (acpi_quirks & ACPI_Q_BROKEN) {
321 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
322 AcpiTerminate();
323 return_VALUE (AE_ERROR);
324 }
325
326 return_VALUE (AE_OK);
327 }
328
329 /*
330 * Detect ACPI, perform early initialisation
331 */
332 static void
333 acpi_identify(driver_t *driver, device_t parent)
334 {
335 device_t child;
336
337 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
338
339 if (!cold)
340 return_VOID;
341
342 /* Check that we haven't been disabled with a hint. */
343 if (resource_disabled("acpi", 0))
344 return_VOID;
345
346 /* Make sure we're not being doubly invoked. */
347 if (device_find_child(parent, "acpi", 0) != NULL)
348 return_VOID;
349
350 /* Initialize ACPI-CA. */
351 if (ACPI_FAILURE(acpi_Startup()))
352 return_VOID;
353
354 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION);
355
356 /* Attach the actual ACPI device. */
357 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
358 device_printf(parent, "device_identify failed\n");
359 return_VOID;
360 }
361 }
362
363 /*
364 * Fetch some descriptive data from ACPI to put in our attach message.
365 */
366 static int
367 acpi_probe(device_t dev)
368 {
369 ACPI_TABLE_HEADER th;
370 char buf[20];
371 int error;
372 struct sbuf sb;
373 ACPI_STATUS status;
374
375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
376
377 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
378 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
379 device_printf(dev, "probe failed, other PM system enabled.\n");
380 return_VALUE (ENXIO);
381 }
382
383 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
384 device_printf(dev, "couldn't get XSDT header: %s\n",
385 AcpiFormatException(status));
386 error = ENXIO;
387 } else {
388 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
389 sbuf_bcat(&sb, th.OemId, 6);
390 sbuf_trim(&sb);
391 sbuf_putc(&sb, ' ');
392 sbuf_bcat(&sb, th.OemTableId, 8);
393 sbuf_trim(&sb);
394 sbuf_finish(&sb);
395 device_set_desc_copy(dev, sbuf_data(&sb));
396 sbuf_delete(&sb);
397 error = 0;
398 }
399
400 return_VALUE (error);
401 }
402
403 static int
404 acpi_attach(device_t dev)
405 {
406 struct acpi_softc *sc;
407 ACPI_STATUS status;
408 int error, state;
409 UINT32 flags;
410 UINT8 TypeA, TypeB;
411 char *env;
412
413 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
414
415 sc = device_get_softc(dev);
416 sc->acpi_dev = dev;
417
418 /* Initialize resource manager. */
419 acpi_rman_io.rm_type = RMAN_ARRAY;
420 acpi_rman_io.rm_start = 0;
421 acpi_rman_io.rm_end = 0xffff;
422 acpi_rman_io.rm_descr = "ACPI I/O ports";
423 if (rman_init(&acpi_rman_io) != 0)
424 panic("acpi rman_init IO ports failed");
425 acpi_rman_mem.rm_type = RMAN_ARRAY;
426 acpi_rman_mem.rm_start = 0;
427 acpi_rman_mem.rm_end = ~0ul;
428 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
429 if (rman_init(&acpi_rman_mem) != 0)
430 panic("acpi rman_init memory failed");
431
432 /* Install the default address space handlers. */
433 error = ENXIO;
434 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
435 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
436 if (ACPI_FAILURE(status)) {
437 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
438 AcpiFormatException(status));
439 goto out;
440 }
441 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
442 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
443 if (ACPI_FAILURE(status)) {
444 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
445 AcpiFormatException(status));
446 goto out;
447 }
448 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
449 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
450 if (ACPI_FAILURE(status)) {
451 device_printf(dev, "could not initialise PciConfig handler: %s\n",
452 AcpiFormatException(status));
453 goto out;
454 }
455
456 /*
457 * Note that some systems (specifically, those with namespace evaluation
458 * issues that require the avoidance of parts of the namespace) must
459 * avoid running _INI and _STA on everything, as well as dodging the final
460 * object init pass.
461 *
462 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
463 *
464 * XXX We should arrange for the object init pass after we have attached
465 * all our child devices, but on many systems it works here.
466 */
467 flags = 0;
468 if (testenv("debug.acpi.avoid"))
469 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
470
471 /* Bring the hardware and basic handlers online. */
472 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
473 device_printf(dev, "Could not enable ACPI: %s\n",
474 AcpiFormatException(status));
475 goto out;
476 }
477
478 /*
479 * Call the ECDT probe function to provide EC functionality before
480 * the namespace has been evaluated.
481 *
482 * XXX This happens before the sysresource devices have been probed and
483 * attached so its resources come from nexus0. In practice, this isn't
484 * a problem but should be addressed eventually.
485 */
486 acpi_ec_ecdt_probe(dev);
487
488 /* Bring device objects and regions online. */
489 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
490 device_printf(dev, "Could not initialize ACPI objects: %s\n",
491 AcpiFormatException(status));
492 goto out;
493 }
494
495 /*
496 * Setup our sysctl tree.
497 *
498 * XXX: This doesn't check to make sure that none of these fail.
499 */
500 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
501 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
502 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
503 device_get_name(dev), CTLFLAG_RD, 0, "");
504 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
505 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
506 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
507 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
508 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
509 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
510 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
511 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
512 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
513 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
514 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
515 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
516 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
517 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
518 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
519 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
520 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
521 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
522 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
523 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
524 "sleep delay");
525 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
526 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
527 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
528 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
529 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
530 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
531 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
532 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
533 OID_AUTO, "handle_reboot", CTLFLAG_RW,
534 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
535
536 /*
537 * Default to 1 second before sleeping to give some machines time to
538 * stabilize.
539 */
540 sc->acpi_sleep_delay = 1;
541 if (bootverbose)
542 sc->acpi_verbose = 1;
543 if ((env = getenv("hw.acpi.verbose")) != NULL) {
544 if (strcmp(env, "") != 0)
545 sc->acpi_verbose = 1;
546 freeenv(env);
547 }
548
549 /* Only enable S4BIOS by default if the FACS says it is available. */
550 if (AcpiGbl_FACS->S4Bios_f != 0)
551 sc->acpi_s4bios = 1;
552
553 /*
554 * Dispatch the default sleep state to devices. The lid switch is set
555 * to NONE by default to avoid surprising users.
556 */
557 sc->acpi_power_button_sx = ACPI_STATE_S5;
558 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
559 sc->acpi_standby_sx = ACPI_STATE_S1;
560 sc->acpi_suspend_sx = ACPI_STATE_S3;
561
562 /* Pick the first valid sleep state for the sleep button default. */
563 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
564 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
565 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
566 sc->acpi_sleep_button_sx = state;
567 break;
568 }
569
570 acpi_enable_fixed_events(sc);
571
572 /*
573 * Scan the namespace and attach/initialise children.
574 */
575
576 /* Register our shutdown handler. */
577 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
578 SHUTDOWN_PRI_LAST);
579
580 /*
581 * Register our acpi event handlers.
582 * XXX should be configurable eg. via userland policy manager.
583 */
584 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
585 sc, ACPI_EVENT_PRI_LAST);
586 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
587 sc, ACPI_EVENT_PRI_LAST);
588
589 /* Flag our initial states. */
590 sc->acpi_enabled = 1;
591 sc->acpi_sstate = ACPI_STATE_S0;
592 sc->acpi_sleep_disabled = 0;
593
594 /* Create the control device */
595 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
596 "acpi");
597 sc->acpi_dev_t->si_drv1 = sc;
598
599 if ((error = acpi_machdep_init(dev)))
600 goto out;
601
602 /* Register ACPI again to pass the correct argument of pm_func. */
603 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
604
605 if (!acpi_disabled("bus"))
606 acpi_probe_children(dev);
607
608 error = 0;
609
610 out:
611 return_VALUE (error);
612 }
613
614 static int
615 acpi_suspend(device_t dev)
616 {
617 device_t child, *devlist;
618 int error, i, numdevs, pstate;
619
620 GIANT_REQUIRED;
621
622 /* First give child devices a chance to suspend. */
623 error = bus_generic_suspend(dev);
624 if (error)
625 return (error);
626
627 /*
628 * Now, set them into the appropriate power state, usually D3. If the
629 * device has an _SxD method for the next sleep state, use that power
630 * state instead.
631 */
632 device_get_children(dev, &devlist, &numdevs);
633 for (i = 0; i < numdevs; i++) {
634 /* If the device is not attached, we've powered it down elsewhere. */
635 child = devlist[i];
636 if (!device_is_attached(child))
637 continue;
638
639 /*
640 * Default to D3 for all sleep states. The _SxD method is optional
641 * so set the powerstate even if it's absent.
642 */
643 pstate = PCI_POWERSTATE_D3;
644 error = acpi_device_pwr_for_sleep(device_get_parent(child),
645 child, &pstate);
646 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
647 pci_set_powerstate(child, pstate);
648 }
649 free(devlist, M_TEMP);
650 error = 0;
651
652 return (error);
653 }
654
655 static int
656 acpi_resume(device_t dev)
657 {
658 ACPI_HANDLE handle;
659 int i, numdevs;
660 device_t child, *devlist;
661
662 GIANT_REQUIRED;
663
664 /*
665 * Put all devices in D0 before resuming them. Call _S0D on each one
666 * since some systems expect this.
667 */
668 device_get_children(dev, &devlist, &numdevs);
669 for (i = 0; i < numdevs; i++) {
670 child = devlist[i];
671 handle = acpi_get_handle(child);
672 if (handle)
673 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
674 if (device_is_attached(child) && acpi_do_powerstate)
675 pci_set_powerstate(child, PCI_POWERSTATE_D0);
676 }
677 free(devlist, M_TEMP);
678
679 return (bus_generic_resume(dev));
680 }
681
682 static int
683 acpi_shutdown(device_t dev)
684 {
685
686 GIANT_REQUIRED;
687
688 /* Allow children to shutdown first. */
689 bus_generic_shutdown(dev);
690
691 /*
692 * Enable any GPEs that are able to power-on the system (i.e., RTC).
693 * Also, disable any that are not valid for this state (most).
694 */
695 acpi_wake_prep_walk(ACPI_STATE_S5);
696
697 return (0);
698 }
699
700 /*
701 * Handle a new device being added
702 */
703 static device_t
704 acpi_add_child(device_t bus, int order, const char *name, int unit)
705 {
706 struct acpi_device *ad;
707 device_t child;
708
709 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
710 return (NULL);
711
712 resource_list_init(&ad->ad_rl);
713
714 child = device_add_child_ordered(bus, order, name, unit);
715 if (child != NULL)
716 device_set_ivars(child, ad);
717 else
718 free(ad, M_ACPIDEV);
719 return (child);
720 }
721
722 static int
723 acpi_print_child(device_t bus, device_t child)
724 {
725 struct acpi_device *adev = device_get_ivars(child);
726 struct resource_list *rl = &adev->ad_rl;
727 int retval = 0;
728
729 retval += bus_print_child_header(bus, child);
730 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
731 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
732 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
733 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
734 if (device_get_flags(child))
735 retval += printf(" flags %#x", device_get_flags(child));
736 retval += bus_print_child_footer(bus, child);
737
738 return (retval);
739 }
740
741 /*
742 * If this device is an ACPI child but no one claimed it, attempt
743 * to power it off. We'll power it back up when a driver is added.
744 *
745 * XXX Disabled for now since many necessary devices (like fdc and
746 * ATA) don't claim the devices we created for them but still expect
747 * them to be powered up.
748 */
749 static void
750 acpi_probe_nomatch(device_t bus, device_t child)
751 {
752
753 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
754 }
755
756 /*
757 * If a new driver has a chance to probe a child, first power it up.
758 *
759 * XXX Disabled for now (see acpi_probe_nomatch for details).
760 */
761 static void
762 acpi_driver_added(device_t dev, driver_t *driver)
763 {
764 device_t child, *devlist;
765 int i, numdevs;
766
767 DEVICE_IDENTIFY(driver, dev);
768 device_get_children(dev, &devlist, &numdevs);
769 for (i = 0; i < numdevs; i++) {
770 child = devlist[i];
771 if (device_get_state(child) == DS_NOTPRESENT) {
772 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
773 if (device_probe_and_attach(child) != 0)
774 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
775 }
776 }
777 free(devlist, M_TEMP);
778 }
779
780 /* Location hint for devctl(8) */
781 static int
782 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
783 size_t buflen)
784 {
785 struct acpi_device *dinfo = device_get_ivars(child);
786
787 if (dinfo->ad_handle)
788 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
789 else
790 snprintf(buf, buflen, "unknown");
791 return (0);
792 }
793
794 /* PnP information for devctl(8) */
795 static int
796 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
797 size_t buflen)
798 {
799 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
800 ACPI_DEVICE_INFO *adinfo;
801 struct acpi_device *dinfo = device_get_ivars(child);
802 char *end;
803 int error;
804
805 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
806 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
807 if (error)
808 snprintf(buf, buflen, "unknown");
809 else
810 snprintf(buf, buflen, "_HID=%s _UID=%lu",
811 (adinfo->Valid & ACPI_VALID_HID) ?
812 adinfo->HardwareId.Value : "none",
813 (adinfo->Valid & ACPI_VALID_UID) ?
814 strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
815 if (adinfo)
816 AcpiOsFree(adinfo);
817
818 return (0);
819 }
820
821 /*
822 * Handle per-device ivars
823 */
824 static int
825 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
826 {
827 struct acpi_device *ad;
828
829 if ((ad = device_get_ivars(child)) == NULL) {
830 printf("device has no ivars\n");
831 return (ENOENT);
832 }
833
834 /* ACPI and ISA compatibility ivars */
835 switch(index) {
836 case ACPI_IVAR_HANDLE:
837 *(ACPI_HANDLE *)result = ad->ad_handle;
838 break;
839 case ACPI_IVAR_MAGIC:
840 *(int *)result = ad->ad_magic;
841 break;
842 case ACPI_IVAR_PRIVATE:
843 *(void **)result = ad->ad_private;
844 break;
845 case ACPI_IVAR_FLAGS:
846 *(int *)result = ad->ad_flags;
847 break;
848 case ISA_IVAR_VENDORID:
849 case ISA_IVAR_SERIAL:
850 case ISA_IVAR_COMPATID:
851 *(int *)result = -1;
852 break;
853 case ISA_IVAR_LOGICALID:
854 *(int *)result = acpi_isa_get_logicalid(child);
855 break;
856 default:
857 return (ENOENT);
858 }
859
860 return (0);
861 }
862
863 static int
864 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
865 {
866 struct acpi_device *ad;
867
868 if ((ad = device_get_ivars(child)) == NULL) {
869 printf("device has no ivars\n");
870 return (ENOENT);
871 }
872
873 switch(index) {
874 case ACPI_IVAR_HANDLE:
875 ad->ad_handle = (ACPI_HANDLE)value;
876 break;
877 case ACPI_IVAR_MAGIC:
878 ad->ad_magic = (int)value;
879 break;
880 case ACPI_IVAR_PRIVATE:
881 ad->ad_private = (void *)value;
882 break;
883 case ACPI_IVAR_FLAGS:
884 ad->ad_flags = (int)value;
885 break;
886 default:
887 panic("bad ivar write request (%d)", index);
888 return (ENOENT);
889 }
890
891 return (0);
892 }
893
894 /*
895 * Handle child resource allocation/removal
896 */
897 static struct resource_list *
898 acpi_get_rlist(device_t dev, device_t child)
899 {
900 struct acpi_device *ad;
901
902 ad = device_get_ivars(child);
903 return (&ad->ad_rl);
904 }
905
906 /*
907 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
908 * duplicates, we merge any in the sysresource attach routine.
909 */
910 static int
911 acpi_sysres_alloc(device_t dev)
912 {
913 struct resource *res;
914 struct resource_list *rl;
915 struct resource_list_entry *rle;
916 struct rman *rm;
917 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
918 device_t *children;
919 int child_count, i;
920
921 /*
922 * Probe/attach any sysresource devices. This would be unnecessary if we
923 * had multi-pass probe/attach.
924 */
925 if (device_get_children(dev, &children, &child_count) != 0)
926 return (ENXIO);
927 for (i = 0; i < child_count; i++) {
928 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
929 device_probe_and_attach(children[i]);
930 }
931 free(children, M_TEMP);
932
933 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
934 STAILQ_FOREACH(rle, rl, link) {
935 if (rle->res != NULL) {
936 device_printf(dev, "duplicate resource for %lx\n", rle->start);
937 continue;
938 }
939
940 /* Only memory and IO resources are valid here. */
941 switch (rle->type) {
942 case SYS_RES_IOPORT:
943 rm = &acpi_rman_io;
944 break;
945 case SYS_RES_MEMORY:
946 rm = &acpi_rman_mem;
947 break;
948 default:
949 continue;
950 }
951
952 /* Pre-allocate resource and add to our rman pool. */
953 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
954 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
955 if (res != NULL) {
956 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
957 rle->res = res;
958 } else
959 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
960 rle->start, rle->count, rle->type);
961 }
962 return (0);
963 }
964
965 /* Find if we manage a given resource. */
966 static struct resource_list_entry *
967 acpi_sysres_find(device_t dev, int type, u_long addr)
968 {
969 struct resource_list *rl;
970 struct resource_list_entry *rle;
971
972 ACPI_SERIAL_ASSERT(acpi);
973
974 /* We only consider IO and memory resources for our pool. */
975 rle = NULL;
976 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY)
977 goto out;
978
979 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
980 STAILQ_FOREACH(rle, rl, link) {
981 if (type == rle->type && addr >= rle->start &&
982 addr < rle->start + rle->count)
983 break;
984 }
985
986 out:
987 return (rle);
988 }
989
990 static struct resource *
991 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
992 u_long start, u_long end, u_long count, u_int flags)
993 {
994 ACPI_RESOURCE ares;
995 struct acpi_device *ad = device_get_ivars(child);
996 struct resource_list *rl = &ad->ad_rl;
997 struct resource_list_entry *rle;
998 struct resource *res;
999 struct rman *rm;
1000
1001 res = NULL;
1002 ACPI_SERIAL_BEGIN(acpi);
1003
1004 /*
1005 * If this is an allocation of the "default" range for a given RID, and
1006 * we know what the resources for this device are (i.e., they're on the
1007 * child's resource list), use those start/end values.
1008 */
1009 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1010 rle = resource_list_find(rl, type, *rid);
1011 if (rle == NULL)
1012 goto out;
1013 start = rle->start;
1014 end = rle->end;
1015 count = rle->count;
1016 }
1017
1018 /* If we don't manage this address, pass the request up to the parent. */
1019 rle = acpi_sysres_find(bus, type, start);
1020 if (rle == NULL) {
1021 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1022 start, end, count, flags);
1023 } else {
1024
1025 /* We only handle memory and IO resources through rman. */
1026 switch (type) {
1027 case SYS_RES_IOPORT:
1028 rm = &acpi_rman_io;
1029 break;
1030 case SYS_RES_MEMORY:
1031 rm = &acpi_rman_mem;
1032 break;
1033 default:
1034 panic("acpi_alloc_resource: invalid res type %d", type);
1035 }
1036
1037 /* If we do know it, allocate it from the local pool. */
1038 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1039 child);
1040 if (res == NULL)
1041 goto out;
1042
1043 /* Copy the bus tag and handle from the pre-allocated resource. */
1044 rman_set_rid(res, *rid);
1045 rman_set_bustag(res, rman_get_bustag(rle->res));
1046 rman_set_bushandle(res, rman_get_start(res));
1047
1048 /* If requested, activate the resource using the parent's method. */
1049 if (flags & RF_ACTIVE)
1050 if (bus_activate_resource(child, type, *rid, res) != 0) {
1051 rman_release_resource(res);
1052 res = NULL;
1053 goto out;
1054 }
1055 }
1056
1057 if (res != NULL && device_get_parent(child) == bus)
1058 switch (type) {
1059 case SYS_RES_IRQ:
1060 /*
1061 * Since bus_config_intr() takes immediate effect, we cannot
1062 * configure the interrupt associated with a device when we
1063 * parse the resources but have to defer it until a driver
1064 * actually allocates the interrupt via bus_alloc_resource().
1065 *
1066 * XXX: Should we handle the lookup failing?
1067 */
1068 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1069 acpi_config_intr(child, &ares);
1070 break;
1071 }
1072
1073 out:
1074 ACPI_SERIAL_END(acpi);
1075 return (res);
1076 }
1077
1078 static int
1079 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1080 struct resource *r)
1081 {
1082 int ret;
1083
1084 ACPI_SERIAL_BEGIN(acpi);
1085
1086 /*
1087 * If we know about this address, deactivate it and release it to the
1088 * local pool. If we don't, pass this request up to the parent.
1089 */
1090 if (acpi_sysres_find(bus, type, rman_get_start(r)) != NULL) {
1091 if (rman_get_flags(r) & RF_ACTIVE) {
1092 ret = bus_deactivate_resource(child, type, rid, r);
1093 if (ret != 0)
1094 goto out;
1095 }
1096 ret = rman_release_resource(r);
1097 } else
1098 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1099
1100 out:
1101 ACPI_SERIAL_END(acpi);
1102 return (ret);
1103 }
1104
1105 static void
1106 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1107 {
1108 struct resource_list *rl;
1109
1110 rl = acpi_get_rlist(bus, child);
1111 resource_list_delete(rl, type, rid);
1112 }
1113
1114 /* Allocate an IO port or memory resource, given its GAS. */
1115 int
1116 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1117 struct resource **res, u_int flags)
1118 {
1119 int error, res_type;
1120
1121 error = ENOMEM;
1122 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1123 return (EINVAL);
1124
1125 /* We only support memory and IO spaces. */
1126 switch (gas->AddressSpaceId) {
1127 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1128 res_type = SYS_RES_MEMORY;
1129 break;
1130 case ACPI_ADR_SPACE_SYSTEM_IO:
1131 res_type = SYS_RES_IOPORT;
1132 break;
1133 default:
1134 return (EOPNOTSUPP);
1135 }
1136
1137 /*
1138 * If the register width is less than 8, assume the BIOS author means
1139 * it is a bit field and just allocate a byte.
1140 */
1141 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8)
1142 gas->RegisterBitWidth = 8;
1143
1144 /* Validate the address after we're sure we support the space. */
1145 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0)
1146 return (EINVAL);
1147
1148 bus_set_resource(dev, res_type, *rid, gas->Address,
1149 gas->RegisterBitWidth / 8);
1150 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1151 if (*res != NULL) {
1152 *type = res_type;
1153 error = 0;
1154 } else
1155 bus_delete_resource(dev, res_type, *rid);
1156
1157 return (error);
1158 }
1159
1160 /* Probe _HID and _CID for compatible ISA PNP ids. */
1161 static uint32_t
1162 acpi_isa_get_logicalid(device_t dev)
1163 {
1164 ACPI_DEVICE_INFO *devinfo;
1165 ACPI_BUFFER buf;
1166 ACPI_HANDLE h;
1167 ACPI_STATUS error;
1168 u_int32_t pnpid;
1169
1170 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1171
1172 pnpid = 0;
1173 buf.Pointer = NULL;
1174 buf.Length = ACPI_ALLOCATE_BUFFER;
1175
1176 /* Fetch and validate the HID. */
1177 if ((h = acpi_get_handle(dev)) == NULL)
1178 goto out;
1179 error = AcpiGetObjectInfo(h, &buf);
1180 if (ACPI_FAILURE(error))
1181 goto out;
1182 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1183
1184 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1185 pnpid = PNP_EISAID(devinfo->HardwareId.Value);
1186
1187 out:
1188 if (buf.Pointer != NULL)
1189 AcpiOsFree(buf.Pointer);
1190 return_VALUE (pnpid);
1191 }
1192
1193 static int
1194 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1195 {
1196 ACPI_DEVICE_INFO *devinfo;
1197 ACPI_BUFFER buf;
1198 ACPI_HANDLE h;
1199 ACPI_STATUS error;
1200 uint32_t *pnpid;
1201 int valid, i;
1202
1203 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1204
1205 pnpid = cids;
1206 valid = 0;
1207 buf.Pointer = NULL;
1208 buf.Length = ACPI_ALLOCATE_BUFFER;
1209
1210 /* Fetch and validate the CID */
1211 if ((h = acpi_get_handle(dev)) == NULL)
1212 goto out;
1213 error = AcpiGetObjectInfo(h, &buf);
1214 if (ACPI_FAILURE(error))
1215 goto out;
1216 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1217 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1218 goto out;
1219
1220 if (devinfo->CompatibilityId.Count < count)
1221 count = devinfo->CompatibilityId.Count;
1222 for (i = 0; i < count; i++) {
1223 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
1224 continue;
1225 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
1226 valid++;
1227 }
1228
1229 out:
1230 if (buf.Pointer != NULL)
1231 AcpiOsFree(buf.Pointer);
1232 return_VALUE (valid);
1233 }
1234
1235 static char *
1236 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1237 {
1238 ACPI_HANDLE h;
1239 int i;
1240
1241 h = acpi_get_handle(dev);
1242 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1243 return (NULL);
1244
1245 /* Try to match one of the array of IDs with a HID or CID. */
1246 for (i = 0; ids[i] != NULL; i++) {
1247 if (acpi_MatchHid(h, ids[i]))
1248 return (ids[i]);
1249 }
1250 return (NULL);
1251 }
1252
1253 static ACPI_STATUS
1254 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1255 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1256 {
1257 ACPI_HANDLE h;
1258
1259 if (dev == NULL)
1260 h = ACPI_ROOT_OBJECT;
1261 else if ((h = acpi_get_handle(dev)) == NULL)
1262 return (AE_BAD_PARAMETER);
1263 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1264 }
1265
1266 static int
1267 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1268 {
1269 struct acpi_softc *sc;
1270 ACPI_HANDLE handle;
1271 ACPI_STATUS status;
1272 char sxd[8];
1273 int error;
1274
1275 sc = device_get_softc(bus);
1276 handle = acpi_get_handle(dev);
1277
1278 /*
1279 * XXX If we find these devices, don't try to power them down.
1280 * The serial and IRDA ports on my T23 hang the system when
1281 * set to D3 and it appears that such legacy devices may
1282 * need special handling in their drivers.
1283 */
1284 if (handle == NULL ||
1285 acpi_MatchHid(handle, "PNP0500") ||
1286 acpi_MatchHid(handle, "PNP0501") ||
1287 acpi_MatchHid(handle, "PNP0502") ||
1288 acpi_MatchHid(handle, "PNP0510") ||
1289 acpi_MatchHid(handle, "PNP0511"))
1290 return (ENXIO);
1291
1292 /*
1293 * Override next state with the value from _SxD, if present. If no
1294 * dstate argument was provided, don't fetch the return value.
1295 */
1296 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1297 if (dstate)
1298 status = acpi_GetInteger(handle, sxd, dstate);
1299 else
1300 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1301
1302 switch (status) {
1303 case AE_OK:
1304 error = 0;
1305 break;
1306 case AE_NOT_FOUND:
1307 error = ESRCH;
1308 break;
1309 default:
1310 error = ENXIO;
1311 break;
1312 }
1313
1314 return (error);
1315 }
1316
1317 /* Callback arg for our implementation of walking the namespace. */
1318 struct acpi_device_scan_ctx {
1319 acpi_scan_cb_t user_fn;
1320 void *arg;
1321 ACPI_HANDLE parent;
1322 };
1323
1324 static ACPI_STATUS
1325 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1326 {
1327 struct acpi_device_scan_ctx *ctx;
1328 device_t dev, old_dev;
1329 ACPI_STATUS status;
1330 ACPI_OBJECT_TYPE type;
1331
1332 /*
1333 * Skip this device if we think we'll have trouble with it or it is
1334 * the parent where the scan began.
1335 */
1336 ctx = (struct acpi_device_scan_ctx *)arg;
1337 if (acpi_avoid(h) || h == ctx->parent)
1338 return (AE_OK);
1339
1340 /* If this is not a valid device type (e.g., a method), skip it. */
1341 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1342 return (AE_OK);
1343 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1344 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1345 return (AE_OK);
1346
1347 /*
1348 * Call the user function with the current device. If it is unchanged
1349 * afterwards, return. Otherwise, we update the handle to the new dev.
1350 */
1351 old_dev = acpi_get_device(h);
1352 dev = old_dev;
1353 status = ctx->user_fn(h, &dev, level, ctx->arg);
1354 if (ACPI_FAILURE(status) || old_dev == dev)
1355 return (status);
1356
1357 /* Remove the old child and its connection to the handle. */
1358 if (old_dev != NULL) {
1359 device_delete_child(device_get_parent(old_dev), old_dev);
1360 AcpiDetachData(h, acpi_fake_objhandler);
1361 }
1362
1363 /* Recreate the handle association if the user created a device. */
1364 if (dev != NULL)
1365 AcpiAttachData(h, acpi_fake_objhandler, dev);
1366
1367 return (AE_OK);
1368 }
1369
1370 static ACPI_STATUS
1371 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1372 acpi_scan_cb_t user_fn, void *arg)
1373 {
1374 ACPI_HANDLE h;
1375 struct acpi_device_scan_ctx ctx;
1376
1377 if (acpi_disabled("children"))
1378 return (AE_OK);
1379
1380 if (dev == NULL)
1381 h = ACPI_ROOT_OBJECT;
1382 else if ((h = acpi_get_handle(dev)) == NULL)
1383 return (AE_BAD_PARAMETER);
1384 ctx.user_fn = user_fn;
1385 ctx.arg = arg;
1386 ctx.parent = h;
1387 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1388 acpi_device_scan_cb, &ctx, NULL));
1389 }
1390
1391 /*
1392 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1393 * device power states since it's close enough to ACPI.
1394 */
1395 static int
1396 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1397 {
1398 ACPI_HANDLE h;
1399 ACPI_STATUS status;
1400 int error;
1401
1402 error = 0;
1403 h = acpi_get_handle(child);
1404 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1405 return (EINVAL);
1406 if (h == NULL)
1407 return (0);
1408
1409 /* Ignore errors if the power methods aren't present. */
1410 status = acpi_pwr_switch_consumer(h, state);
1411 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1412 && status != AE_BAD_PARAMETER)
1413 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1414 state, acpi_name(h), AcpiFormatException(status));
1415
1416 return (error);
1417 }
1418
1419 static int
1420 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1421 {
1422 int result, cid_count, i;
1423 uint32_t lid, cids[8];
1424
1425 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1426
1427 /*
1428 * ISA-style drivers attached to ACPI may persist and
1429 * probe manually if we return ENOENT. We never want
1430 * that to happen, so don't ever return it.
1431 */
1432 result = ENXIO;
1433
1434 /* Scan the supplied IDs for a match */
1435 lid = acpi_isa_get_logicalid(child);
1436 cid_count = acpi_isa_get_compatid(child, cids, 8);
1437 while (ids && ids->ip_id) {
1438 if (lid == ids->ip_id) {
1439 result = 0;
1440 goto out;
1441 }
1442 for (i = 0; i < cid_count; i++) {
1443 if (cids[i] == ids->ip_id) {
1444 result = 0;
1445 goto out;
1446 }
1447 }
1448 ids++;
1449 }
1450
1451 out:
1452 if (result == 0 && ids->ip_desc)
1453 device_set_desc(child, ids->ip_desc);
1454
1455 return_VALUE (result);
1456 }
1457
1458 /*
1459 * Scan all of the ACPI namespace and attach child devices.
1460 *
1461 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1462 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1463 * However, in violation of the spec, some systems place their PCI link
1464 * devices in \, so we have to walk the whole namespace. We check the
1465 * type of namespace nodes, so this should be ok.
1466 */
1467 static void
1468 acpi_probe_children(device_t bus)
1469 {
1470
1471 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1472
1473 /*
1474 * Scan the namespace and insert placeholders for all the devices that
1475 * we find. We also probe/attach any early devices.
1476 *
1477 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1478 * we want to create nodes for all devices, not just those that are
1479 * currently present. (This assumes that we don't want to create/remove
1480 * devices as they appear, which might be smarter.)
1481 */
1482 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1483 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1484 bus, NULL);
1485
1486 /* Pre-allocate resources for our rman from any sysresource devices. */
1487 acpi_sysres_alloc(bus);
1488
1489 /* Create any static children by calling device identify methods. */
1490 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1491 bus_generic_probe(bus);
1492
1493 /* Probe/attach all children, created staticly and from the namespace. */
1494 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1495 bus_generic_attach(bus);
1496
1497 /*
1498 * Some of these children may have attached others as part of their attach
1499 * process (eg. the root PCI bus driver), so rescan.
1500 */
1501 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1502 bus_generic_attach(bus);
1503
1504 /* Attach wake sysctls. */
1505 acpi_wake_sysctl_walk(bus);
1506
1507 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1508 return_VOID;
1509 }
1510
1511 /*
1512 * Determine the probe order for a given device and return non-zero if it
1513 * should be attached immediately.
1514 */
1515 static int
1516 acpi_probe_order(ACPI_HANDLE handle, int *order)
1517 {
1518
1519 /*
1520 * 1. I/O port and memory system resource holders
1521 * 2. Embedded controllers (to handle early accesses)
1522 * 3. PCI Link Devices
1523 */
1524 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1525 *order = 1;
1526 else if (acpi_MatchHid(handle, "PNP0C09"))
1527 *order = 2;
1528 else if (acpi_MatchHid(handle, "PNP0C0F"))
1529 *order = 3;
1530 return (0);
1531 }
1532
1533 /*
1534 * Evaluate a child device and determine whether we might attach a device to
1535 * it.
1536 */
1537 static ACPI_STATUS
1538 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1539 {
1540 ACPI_OBJECT_TYPE type;
1541 ACPI_HANDLE h;
1542 device_t bus, child;
1543 int order;
1544 char *handle_str, **search;
1545 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL};
1546
1547 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1548
1549 /* Skip this device if we think we'll have trouble with it. */
1550 if (acpi_avoid(handle))
1551 return_ACPI_STATUS (AE_OK);
1552
1553 bus = (device_t)context;
1554 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1555 switch (type) {
1556 case ACPI_TYPE_DEVICE:
1557 case ACPI_TYPE_PROCESSOR:
1558 case ACPI_TYPE_THERMAL:
1559 case ACPI_TYPE_POWER:
1560 if (acpi_disabled("children"))
1561 break;
1562
1563 /*
1564 * Since we scan from \, be sure to skip system scope objects.
1565 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?)
1566 */
1567 handle_str = acpi_name(handle);
1568 for (search = scopes; *search != NULL; search++) {
1569 if (strcmp(handle_str, *search) == 0)
1570 break;
1571 }
1572 if (*search != NULL)
1573 break;
1574
1575 /*
1576 * Create a placeholder device for this node. Sort the placeholder
1577 * so that the probe/attach passes will run breadth-first. Orders
1578 * less than ACPI_DEV_BASE_ORDER are reserved for special objects
1579 * (i.e., system resources). Larger values are used for all other
1580 * devices.
1581 */
1582 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1583 order = (level + 1) * ACPI_DEV_BASE_ORDER;
1584 acpi_probe_order(handle, &order);
1585 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1586 if (child == NULL)
1587 break;
1588
1589 /* Associate the handle with the device_t and vice versa. */
1590 acpi_set_handle(child, handle);
1591 AcpiAttachData(handle, acpi_fake_objhandler, child);
1592
1593 /*
1594 * Check that the device is present. If it's not present,
1595 * leave it disabled (so that we have a device_t attached to
1596 * the handle, but we don't probe it).
1597 *
1598 * XXX PCI link devices sometimes report "present" but not
1599 * "functional" (i.e. if disabled). Go ahead and probe them
1600 * anyway since we may enable them later.
1601 */
1602 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1603 /* Never disable PCI link devices. */
1604 if (acpi_MatchHid(handle, "PNP0C0F"))
1605 break;
1606 /*
1607 * Docking stations should remain enabled since the system
1608 * may be undocked at boot.
1609 */
1610 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1611 break;
1612
1613 device_disable(child);
1614 break;
1615 }
1616
1617 /*
1618 * Get the device's resource settings and attach them.
1619 * Note that if the device has _PRS but no _CRS, we need
1620 * to decide when it's appropriate to try to configure the
1621 * device. Ignore the return value here; it's OK for the
1622 * device not to have any resources.
1623 */
1624 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1625 break;
1626 }
1627 }
1628
1629 return_ACPI_STATUS (AE_OK);
1630 }
1631
1632 /*
1633 * AcpiAttachData() requires an object handler but never uses it. This is a
1634 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1635 */
1636 void
1637 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data)
1638 {
1639 }
1640
1641 static void
1642 acpi_shutdown_final(void *arg, int howto)
1643 {
1644 struct acpi_softc *sc;
1645 ACPI_STATUS status;
1646
1647 /*
1648 * XXX Shutdown code should only run on the BSP (cpuid 0).
1649 * Some chipsets do not power off the system correctly if called from
1650 * an AP.
1651 */
1652 sc = arg;
1653 if ((howto & RB_POWEROFF) != 0) {
1654 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1655 if (ACPI_FAILURE(status)) {
1656 printf("AcpiEnterSleepStatePrep failed - %s\n",
1657 AcpiFormatException(status));
1658 return;
1659 }
1660 printf("Powering system off using ACPI\n");
1661 ACPI_DISABLE_IRQS();
1662 status = AcpiEnterSleepState(ACPI_STATE_S5);
1663 if (ACPI_FAILURE(status)) {
1664 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1665 } else {
1666 DELAY(1000000);
1667 printf("ACPI power-off failed - timeout\n");
1668 }
1669 } else if ((howto & RB_HALT) == 0 && AcpiGbl_FADT->ResetRegSup &&
1670 sc->acpi_handle_reboot) {
1671 /* Reboot using the reset register. */
1672 status = AcpiHwLowLevelWrite(
1673 AcpiGbl_FADT->ResetRegister.RegisterBitWidth,
1674 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister);
1675 if (ACPI_FAILURE(status)) {
1676 printf("ACPI reset failed - %s\n", AcpiFormatException(status));
1677 } else {
1678 DELAY(1000000);
1679 printf("ACPI reset failed - timeout\n");
1680 }
1681 } else if (sc->acpi_do_disable && panicstr == NULL) {
1682 /*
1683 * Only disable ACPI if the user requested. On some systems, writing
1684 * the disable value to SMI_CMD hangs the system.
1685 */
1686 printf("Shutting down ACPI\n");
1687 AcpiTerminate();
1688 }
1689 }
1690
1691 static void
1692 acpi_enable_fixed_events(struct acpi_softc *sc)
1693 {
1694 static int first_time = 1;
1695
1696 /* Enable and clear fixed events and install handlers. */
1697 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) {
1698 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1699 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1700 acpi_event_power_button_sleep, sc);
1701 if (first_time)
1702 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1703 }
1704 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) {
1705 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1706 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1707 acpi_event_sleep_button_sleep, sc);
1708 if (first_time)
1709 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1710 }
1711
1712 first_time = 0;
1713 }
1714
1715 /*
1716 * Returns true if the device is actually present and should
1717 * be attached to. This requires the present, enabled, UI-visible
1718 * and diagnostics-passed bits to be set.
1719 */
1720 BOOLEAN
1721 acpi_DeviceIsPresent(device_t dev)
1722 {
1723 ACPI_DEVICE_INFO *devinfo;
1724 ACPI_HANDLE h;
1725 ACPI_BUFFER buf;
1726 ACPI_STATUS error;
1727 int ret;
1728
1729 ret = FALSE;
1730 if ((h = acpi_get_handle(dev)) == NULL)
1731 return (FALSE);
1732 buf.Pointer = NULL;
1733 buf.Length = ACPI_ALLOCATE_BUFFER;
1734 error = AcpiGetObjectInfo(h, &buf);
1735 if (ACPI_FAILURE(error))
1736 return (FALSE);
1737 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1738
1739 /* If no _STA method, must be present */
1740 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1741 ret = TRUE;
1742
1743 /* Return true for 'present' and 'functioning' */
1744 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1745 ret = TRUE;
1746
1747 AcpiOsFree(buf.Pointer);
1748 return (ret);
1749 }
1750
1751 /*
1752 * Returns true if the battery is actually present and inserted.
1753 */
1754 BOOLEAN
1755 acpi_BatteryIsPresent(device_t dev)
1756 {
1757 ACPI_DEVICE_INFO *devinfo;
1758 ACPI_HANDLE h;
1759 ACPI_BUFFER buf;
1760 ACPI_STATUS error;
1761 int ret;
1762
1763 ret = FALSE;
1764 if ((h = acpi_get_handle(dev)) == NULL)
1765 return (FALSE);
1766 buf.Pointer = NULL;
1767 buf.Length = ACPI_ALLOCATE_BUFFER;
1768 error = AcpiGetObjectInfo(h, &buf);
1769 if (ACPI_FAILURE(error))
1770 return (FALSE);
1771 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1772
1773 /* If no _STA method, must be present */
1774 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1775 ret = TRUE;
1776
1777 /* Return true for 'present', 'battery present', and 'functioning' */
1778 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1779 ret = TRUE;
1780
1781 AcpiOsFree(buf.Pointer);
1782 return (ret);
1783 }
1784
1785 /*
1786 * Match a HID string against a handle
1787 */
1788 static BOOLEAN
1789 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1790 {
1791 ACPI_DEVICE_INFO *devinfo;
1792 ACPI_BUFFER buf;
1793 ACPI_STATUS error;
1794 int ret, i;
1795
1796 ret = FALSE;
1797 if (hid == NULL || h == NULL)
1798 return (ret);
1799 buf.Pointer = NULL;
1800 buf.Length = ACPI_ALLOCATE_BUFFER;
1801 error = AcpiGetObjectInfo(h, &buf);
1802 if (ACPI_FAILURE(error))
1803 return (ret);
1804 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1805
1806 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1807 strcmp(hid, devinfo->HardwareId.Value) == 0)
1808 ret = TRUE;
1809 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1810 for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
1811 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
1812 ret = TRUE;
1813 break;
1814 }
1815 }
1816 }
1817
1818 AcpiOsFree(buf.Pointer);
1819 return (ret);
1820 }
1821
1822 /*
1823 * Return the handle of a named object within our scope, ie. that of (parent)
1824 * or one if its parents.
1825 */
1826 ACPI_STATUS
1827 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1828 {
1829 ACPI_HANDLE r;
1830 ACPI_STATUS status;
1831
1832 /* Walk back up the tree to the root */
1833 for (;;) {
1834 status = AcpiGetHandle(parent, path, &r);
1835 if (ACPI_SUCCESS(status)) {
1836 *result = r;
1837 return (AE_OK);
1838 }
1839 /* XXX Return error here? */
1840 if (status != AE_NOT_FOUND)
1841 return (AE_OK);
1842 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1843 return (AE_NOT_FOUND);
1844 parent = r;
1845 }
1846 }
1847
1848 /* Find the difference between two PM tick counts. */
1849 uint32_t
1850 acpi_TimerDelta(uint32_t end, uint32_t start)
1851 {
1852 uint32_t delta;
1853
1854 if (end >= start)
1855 delta = end - start;
1856 else if (AcpiGbl_FADT->TmrValExt == 0)
1857 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1858 else
1859 delta = ((0xFFFFFFFF - start) + end + 1);
1860 return (delta);
1861 }
1862
1863 /*
1864 * Allocate a buffer with a preset data size.
1865 */
1866 ACPI_BUFFER *
1867 acpi_AllocBuffer(int size)
1868 {
1869 ACPI_BUFFER *buf;
1870
1871 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1872 return (NULL);
1873 buf->Length = size;
1874 buf->Pointer = (void *)(buf + 1);
1875 return (buf);
1876 }
1877
1878 ACPI_STATUS
1879 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1880 {
1881 ACPI_OBJECT arg1;
1882 ACPI_OBJECT_LIST args;
1883
1884 arg1.Type = ACPI_TYPE_INTEGER;
1885 arg1.Integer.Value = number;
1886 args.Count = 1;
1887 args.Pointer = &arg1;
1888
1889 return (AcpiEvaluateObject(handle, path, &args, NULL));
1890 }
1891
1892 /*
1893 * Evaluate a path that should return an integer.
1894 */
1895 ACPI_STATUS
1896 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1897 {
1898 ACPI_STATUS status;
1899 ACPI_BUFFER buf;
1900 ACPI_OBJECT param;
1901
1902 if (handle == NULL)
1903 handle = ACPI_ROOT_OBJECT;
1904
1905 /*
1906 * Assume that what we've been pointed at is an Integer object, or
1907 * a method that will return an Integer.
1908 */
1909 buf.Pointer = ¶m;
1910 buf.Length = sizeof(param);
1911 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1912 if (ACPI_SUCCESS(status)) {
1913 if (param.Type == ACPI_TYPE_INTEGER)
1914 *number = param.Integer.Value;
1915 else
1916 status = AE_TYPE;
1917 }
1918
1919 /*
1920 * In some applications, a method that's expected to return an Integer
1921 * may instead return a Buffer (probably to simplify some internal
1922 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1923 * convert it into an Integer as best we can.
1924 *
1925 * This is a hack.
1926 */
1927 if (status == AE_BUFFER_OVERFLOW) {
1928 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1929 status = AE_NO_MEMORY;
1930 } else {
1931 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1932 if (ACPI_SUCCESS(status))
1933 status = acpi_ConvertBufferToInteger(&buf, number);
1934 AcpiOsFree(buf.Pointer);
1935 }
1936 }
1937 return (status);
1938 }
1939
1940 ACPI_STATUS
1941 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1942 {
1943 ACPI_OBJECT *p;
1944 UINT8 *val;
1945 int i;
1946
1947 p = (ACPI_OBJECT *)bufp->Pointer;
1948 if (p->Type == ACPI_TYPE_INTEGER) {
1949 *number = p->Integer.Value;
1950 return (AE_OK);
1951 }
1952 if (p->Type != ACPI_TYPE_BUFFER)
1953 return (AE_TYPE);
1954 if (p->Buffer.Length > sizeof(int))
1955 return (AE_BAD_DATA);
1956
1957 *number = 0;
1958 val = p->Buffer.Pointer;
1959 for (i = 0; i < p->Buffer.Length; i++)
1960 *number += val[i] << (i * 8);
1961 return (AE_OK);
1962 }
1963
1964 /*
1965 * Iterate over the elements of an a package object, calling the supplied
1966 * function for each element.
1967 *
1968 * XXX possible enhancement might be to abort traversal on error.
1969 */
1970 ACPI_STATUS
1971 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
1972 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
1973 {
1974 ACPI_OBJECT *comp;
1975 int i;
1976
1977 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
1978 return (AE_BAD_PARAMETER);
1979
1980 /* Iterate over components */
1981 i = 0;
1982 comp = pkg->Package.Elements;
1983 for (; i < pkg->Package.Count; i++, comp++)
1984 func(comp, arg);
1985
1986 return (AE_OK);
1987 }
1988
1989 /*
1990 * Find the (index)th resource object in a set.
1991 */
1992 ACPI_STATUS
1993 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1994 {
1995 ACPI_RESOURCE *rp;
1996 int i;
1997
1998 rp = (ACPI_RESOURCE *)buf->Pointer;
1999 i = index;
2000 while (i-- > 0) {
2001 /* Range check */
2002 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2003 return (AE_BAD_PARAMETER);
2004
2005 /* Check for terminator */
2006 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
2007 return (AE_NOT_FOUND);
2008 rp = ACPI_NEXT_RESOURCE(rp);
2009 }
2010 if (resp != NULL)
2011 *resp = rp;
2012
2013 return (AE_OK);
2014 }
2015
2016 /*
2017 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2018 *
2019 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2020 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2021 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2022 * resources.
2023 */
2024 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2025
2026 ACPI_STATUS
2027 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2028 {
2029 ACPI_RESOURCE *rp;
2030 void *newp;
2031
2032 /* Initialise the buffer if necessary. */
2033 if (buf->Pointer == NULL) {
2034 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2035 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2036 return (AE_NO_MEMORY);
2037 rp = (ACPI_RESOURCE *)buf->Pointer;
2038 rp->Id = ACPI_RSTYPE_END_TAG;
2039 rp->Length = 0;
2040 }
2041 if (res == NULL)
2042 return (AE_OK);
2043
2044 /*
2045 * Scan the current buffer looking for the terminator.
2046 * This will either find the terminator or hit the end
2047 * of the buffer and return an error.
2048 */
2049 rp = (ACPI_RESOURCE *)buf->Pointer;
2050 for (;;) {
2051 /* Range check, don't go outside the buffer */
2052 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2053 return (AE_BAD_PARAMETER);
2054 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
2055 break;
2056 rp = ACPI_NEXT_RESOURCE(rp);
2057 }
2058
2059 /*
2060 * Check the size of the buffer and expand if required.
2061 *
2062 * Required size is:
2063 * size of existing resources before terminator +
2064 * size of new resource and header +
2065 * size of terminator.
2066 *
2067 * Note that this loop should really only run once, unless
2068 * for some reason we are stuffing a *really* huge resource.
2069 */
2070 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2071 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
2072 ACPI_RESOURCE_LENGTH) >= buf->Length) {
2073 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2074 return (AE_NO_MEMORY);
2075 bcopy(buf->Pointer, newp, buf->Length);
2076 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2077 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2078 AcpiOsFree(buf->Pointer);
2079 buf->Pointer = newp;
2080 buf->Length += buf->Length;
2081 }
2082
2083 /* Insert the new resource. */
2084 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
2085
2086 /* And add the terminator. */
2087 rp = ACPI_NEXT_RESOURCE(rp);
2088 rp->Id = ACPI_RSTYPE_END_TAG;
2089 rp->Length = 0;
2090
2091 return (AE_OK);
2092 }
2093
2094 /*
2095 * Set interrupt model.
2096 */
2097 ACPI_STATUS
2098 acpi_SetIntrModel(int model)
2099 {
2100
2101 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2102 }
2103
2104 static void
2105 acpi_sleep_enable(void *arg)
2106 {
2107
2108 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2109 }
2110
2111 enum acpi_sleep_state {
2112 ACPI_SS_NONE,
2113 ACPI_SS_GPE_SET,
2114 ACPI_SS_DEV_SUSPEND,
2115 ACPI_SS_SLP_PREP,
2116 ACPI_SS_SLEPT,
2117 };
2118
2119 /*
2120 * Set the system sleep state
2121 *
2122 * Currently we support S1-S5 but S4 is only S4BIOS
2123 */
2124 ACPI_STATUS
2125 acpi_SetSleepState(struct acpi_softc *sc, int state)
2126 {
2127 ACPI_STATUS status;
2128 UINT8 TypeA;
2129 UINT8 TypeB;
2130 enum acpi_sleep_state slp_state;
2131
2132 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2133
2134 status = AE_OK;
2135 ACPI_LOCK(acpi);
2136 if (sc->acpi_sleep_disabled) {
2137 if (sc->acpi_sstate != ACPI_STATE_S0)
2138 status = AE_ERROR;
2139 ACPI_UNLOCK(acpi);
2140 printf("acpi: suspend request ignored (not ready yet)\n");
2141 return (status);
2142 }
2143 sc->acpi_sleep_disabled = 1;
2144 ACPI_UNLOCK(acpi);
2145
2146 /*
2147 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2148 * drivers need this.
2149 */
2150 mtx_lock(&Giant);
2151 slp_state = ACPI_SS_NONE;
2152 switch (state) {
2153 case ACPI_STATE_S1:
2154 case ACPI_STATE_S2:
2155 case ACPI_STATE_S3:
2156 case ACPI_STATE_S4:
2157 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2158 if (status == AE_NOT_FOUND) {
2159 device_printf(sc->acpi_dev,
2160 "Sleep state S%d not supported by BIOS\n", state);
2161 break;
2162 } else if (ACPI_FAILURE(status)) {
2163 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2164 AcpiFormatException(status));
2165 break;
2166 }
2167
2168 sc->acpi_sstate = state;
2169
2170 /* Enable any GPEs as appropriate and requested by the user. */
2171 acpi_wake_prep_walk(state);
2172 slp_state = ACPI_SS_GPE_SET;
2173
2174 /*
2175 * Inform all devices that we are going to sleep. If at least one
2176 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2177 *
2178 * XXX Note that a better two-pass approach with a 'veto' pass
2179 * followed by a "real thing" pass would be better, but the current
2180 * bus interface does not provide for this.
2181 */
2182 if (DEVICE_SUSPEND(root_bus) != 0) {
2183 device_printf(sc->acpi_dev, "device_suspend failed\n");
2184 break;
2185 }
2186 slp_state = ACPI_SS_DEV_SUSPEND;
2187
2188 /* If testing device suspend only, back out of everything here. */
2189 if (acpi_susp_bounce)
2190 break;
2191
2192 status = AcpiEnterSleepStatePrep(state);
2193 if (ACPI_FAILURE(status)) {
2194 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2195 AcpiFormatException(status));
2196 break;
2197 }
2198 slp_state = ACPI_SS_SLP_PREP;
2199
2200 if (sc->acpi_sleep_delay > 0)
2201 DELAY(sc->acpi_sleep_delay * 1000000);
2202
2203 if (state != ACPI_STATE_S1) {
2204 acpi_sleep_machdep(sc, state);
2205
2206 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2207 if (state == ACPI_STATE_S4)
2208 AcpiEnable();
2209 } else {
2210 ACPI_DISABLE_IRQS();
2211 status = AcpiEnterSleepState(state);
2212 if (ACPI_FAILURE(status)) {
2213 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2214 AcpiFormatException(status));
2215 break;
2216 }
2217 }
2218 slp_state = ACPI_SS_SLEPT;
2219 break;
2220 case ACPI_STATE_S5:
2221 /*
2222 * Shut down cleanly and power off. This will call us back through the
2223 * shutdown handlers.
2224 */
2225 shutdown_nice(RB_POWEROFF);
2226 break;
2227 case ACPI_STATE_S0:
2228 default:
2229 status = AE_BAD_PARAMETER;
2230 break;
2231 }
2232
2233 /*
2234 * Back out state according to how far along we got in the suspend
2235 * process. This handles both the error and success cases.
2236 */
2237 if (slp_state >= ACPI_SS_GPE_SET) {
2238 acpi_wake_prep_walk(state);
2239 sc->acpi_sstate = ACPI_STATE_S0;
2240 }
2241 if (slp_state >= ACPI_SS_SLP_PREP)
2242 AcpiLeaveSleepState(state);
2243 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2244 DEVICE_RESUME(root_bus);
2245 if (slp_state >= ACPI_SS_SLEPT)
2246 acpi_enable_fixed_events(sc);
2247
2248 /* Allow another sleep request after a while. */
2249 if (state != ACPI_STATE_S5)
2250 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
2251
2252 mtx_unlock(&Giant);
2253 return_ACPI_STATUS (status);
2254 }
2255
2256 /* Initialize a device's wake GPE. */
2257 int
2258 acpi_wake_init(device_t dev, int type)
2259 {
2260 struct acpi_prw_data prw;
2261
2262 /* Evaluate _PRW to find the GPE. */
2263 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2264 return (ENXIO);
2265
2266 /* Set the requested type for the GPE (runtime, wake, or both). */
2267 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
2268 device_printf(dev, "set GPE type failed\n");
2269 return (ENXIO);
2270 }
2271
2272 return (0);
2273 }
2274
2275 /* Enable or disable the device's wake GPE. */
2276 int
2277 acpi_wake_set_enable(device_t dev, int enable)
2278 {
2279 struct acpi_prw_data prw;
2280 ACPI_HANDLE handle;
2281 ACPI_STATUS status;
2282 int flags;
2283
2284 /* Make sure the device supports waking the system and get the GPE. */
2285 handle = acpi_get_handle(dev);
2286 if (acpi_parse_prw(handle, &prw) != 0)
2287 return (ENXIO);
2288
2289 flags = acpi_get_flags(dev);
2290 if (enable) {
2291 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2292 if (ACPI_FAILURE(status)) {
2293 device_printf(dev, "enable wake failed\n");
2294 return (ENXIO);
2295 }
2296 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2297 } else {
2298 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2299 if (ACPI_FAILURE(status)) {
2300 device_printf(dev, "disable wake failed\n");
2301 return (ENXIO);
2302 }
2303 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2304 }
2305
2306 return (0);
2307 }
2308
2309 static int
2310 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2311 {
2312 struct acpi_prw_data prw;
2313 device_t dev;
2314
2315 /* Check that this is a wake-capable device and get its GPE. */
2316 if (acpi_parse_prw(handle, &prw) != 0)
2317 return (ENXIO);
2318 dev = acpi_get_device(handle);
2319
2320 /*
2321 * The destination sleep state must be less than (i.e., higher power)
2322 * or equal to the value specified by _PRW. If this GPE cannot be
2323 * enabled for the next sleep state, then disable it. If it can and
2324 * the user requested it be enabled, turn on any required power resources
2325 * and set _PSW.
2326 */
2327 if (sstate > prw.lowest_wake) {
2328 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2329 if (bootverbose)
2330 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2331 acpi_name(handle), sstate);
2332 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2333 acpi_pwr_wake_enable(handle, 1);
2334 acpi_SetInteger(handle, "_PSW", 1);
2335 if (bootverbose)
2336 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2337 acpi_name(handle), sstate);
2338 }
2339
2340 return (0);
2341 }
2342
2343 static int
2344 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2345 {
2346 struct acpi_prw_data prw;
2347 device_t dev;
2348
2349 /*
2350 * Check that this is a wake-capable device and get its GPE. Return
2351 * now if the user didn't enable this device for wake.
2352 */
2353 if (acpi_parse_prw(handle, &prw) != 0)
2354 return (ENXIO);
2355 dev = acpi_get_device(handle);
2356 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2357 return (0);
2358
2359 /*
2360 * If this GPE couldn't be enabled for the previous sleep state, it was
2361 * disabled before going to sleep so re-enable it. If it was enabled,
2362 * clear _PSW and turn off any power resources it used.
2363 */
2364 if (sstate > prw.lowest_wake) {
2365 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2366 if (bootverbose)
2367 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2368 } else {
2369 acpi_SetInteger(handle, "_PSW", 0);
2370 acpi_pwr_wake_enable(handle, 0);
2371 if (bootverbose)
2372 device_printf(dev, "run_prep cleaned up for %s\n",
2373 acpi_name(handle));
2374 }
2375
2376 return (0);
2377 }
2378
2379 static ACPI_STATUS
2380 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2381 {
2382 int sstate;
2383
2384 /* If suspending, run the sleep prep function, otherwise wake. */
2385 sstate = *(int *)context;
2386 if (AcpiGbl_SystemAwakeAndRunning)
2387 acpi_wake_sleep_prep(handle, sstate);
2388 else
2389 acpi_wake_run_prep(handle, sstate);
2390 return (AE_OK);
2391 }
2392
2393 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2394 static int
2395 acpi_wake_prep_walk(int sstate)
2396 {
2397 ACPI_HANDLE sb_handle;
2398
2399 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2400 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2401 acpi_wake_prep, &sstate, NULL);
2402 return (0);
2403 }
2404
2405 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2406 static int
2407 acpi_wake_sysctl_walk(device_t dev)
2408 {
2409 int error, i, numdevs;
2410 device_t *devlist;
2411 device_t child;
2412 ACPI_STATUS status;
2413
2414 error = device_get_children(dev, &devlist, &numdevs);
2415 if (error != 0 || numdevs == 0) {
2416 if (numdevs == 0)
2417 free(devlist, M_TEMP);
2418 return (error);
2419 }
2420 for (i = 0; i < numdevs; i++) {
2421 child = devlist[i];
2422 acpi_wake_sysctl_walk(child);
2423 if (!device_is_attached(child))
2424 continue;
2425 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2426 if (ACPI_SUCCESS(status)) {
2427 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2428 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2429 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2430 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2431 }
2432 }
2433 free(devlist, M_TEMP);
2434
2435 return (0);
2436 }
2437
2438 /* Enable or disable wake from userland. */
2439 static int
2440 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2441 {
2442 int enable, error;
2443 device_t dev;
2444
2445 dev = (device_t)arg1;
2446 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2447
2448 error = sysctl_handle_int(oidp, &enable, 0, req);
2449 if (error != 0 || req->newptr == NULL)
2450 return (error);
2451 if (enable != 0 && enable != 1)
2452 return (EINVAL);
2453
2454 return (acpi_wake_set_enable(dev, enable));
2455 }
2456
2457 /* Parse a device's _PRW into a structure. */
2458 int
2459 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2460 {
2461 ACPI_STATUS status;
2462 ACPI_BUFFER prw_buffer;
2463 ACPI_OBJECT *res, *res2;
2464 int error, i, power_count;
2465
2466 if (h == NULL || prw == NULL)
2467 return (EINVAL);
2468
2469 /*
2470 * The _PRW object (7.2.9) is only required for devices that have the
2471 * ability to wake the system from a sleeping state.
2472 */
2473 error = EINVAL;
2474 prw_buffer.Pointer = NULL;
2475 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2476 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2477 if (ACPI_FAILURE(status))
2478 return (ENOENT);
2479 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2480 if (res == NULL)
2481 return (ENOENT);
2482 if (!ACPI_PKG_VALID(res, 2))
2483 goto out;
2484
2485 /*
2486 * Element 1 of the _PRW object:
2487 * The lowest power system sleeping state that can be entered while still
2488 * providing wake functionality. The sleeping state being entered must
2489 * be less than (i.e., higher power) or equal to this value.
2490 */
2491 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2492 goto out;
2493
2494 /*
2495 * Element 0 of the _PRW object:
2496 */
2497 switch (res->Package.Elements[0].Type) {
2498 case ACPI_TYPE_INTEGER:
2499 /*
2500 * If the data type of this package element is numeric, then this
2501 * _PRW package element is the bit index in the GPEx_EN, in the
2502 * GPE blocks described in the FADT, of the enable bit that is
2503 * enabled for the wake event.
2504 */
2505 prw->gpe_handle = NULL;
2506 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2507 error = 0;
2508 break;
2509 case ACPI_TYPE_PACKAGE:
2510 /*
2511 * If the data type of this package element is a package, then this
2512 * _PRW package element is itself a package containing two
2513 * elements. The first is an object reference to the GPE Block
2514 * device that contains the GPE that will be triggered by the wake
2515 * event. The second element is numeric and it contains the bit
2516 * index in the GPEx_EN, in the GPE Block referenced by the
2517 * first element in the package, of the enable bit that is enabled for
2518 * the wake event.
2519 *
2520 * For example, if this field is a package then it is of the form:
2521 * Package() {\_SB.PCI0.ISA.GPE, 2}
2522 */
2523 res2 = &res->Package.Elements[0];
2524 if (!ACPI_PKG_VALID(res2, 2))
2525 goto out;
2526 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2527 if (prw->gpe_handle == NULL)
2528 goto out;
2529 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2530 goto out;
2531 error = 0;
2532 break;
2533 default:
2534 goto out;
2535 }
2536
2537 /* Elements 2 to N of the _PRW object are power resources. */
2538 power_count = res->Package.Count - 2;
2539 if (power_count > ACPI_PRW_MAX_POWERRES) {
2540 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2541 power_count = 0;
2542 }
2543 prw->power_res_count = power_count;
2544 for (i = 0; i < power_count; i++)
2545 prw->power_res[i] = res->Package.Elements[i];
2546
2547 out:
2548 if (prw_buffer.Pointer != NULL)
2549 AcpiOsFree(prw_buffer.Pointer);
2550 return (error);
2551 }
2552
2553 /*
2554 * ACPI Event Handlers
2555 */
2556
2557 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2558
2559 static void
2560 acpi_system_eventhandler_sleep(void *arg, int state)
2561 {
2562
2563 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2564
2565 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2566 acpi_SetSleepState((struct acpi_softc *)arg, state);
2567
2568 return_VOID;
2569 }
2570
2571 static void
2572 acpi_system_eventhandler_wakeup(void *arg, int state)
2573 {
2574
2575 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2576
2577 /* Currently, nothing to do for wakeup. */
2578
2579 return_VOID;
2580 }
2581
2582 /*
2583 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2584 */
2585 UINT32
2586 acpi_event_power_button_sleep(void *context)
2587 {
2588 struct acpi_softc *sc = (struct acpi_softc *)context;
2589
2590 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2591
2592 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2593
2594 return_VALUE (ACPI_INTERRUPT_HANDLED);
2595 }
2596
2597 UINT32
2598 acpi_event_power_button_wake(void *context)
2599 {
2600 struct acpi_softc *sc = (struct acpi_softc *)context;
2601
2602 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2603
2604 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2605
2606 return_VALUE (ACPI_INTERRUPT_HANDLED);
2607 }
2608
2609 UINT32
2610 acpi_event_sleep_button_sleep(void *context)
2611 {
2612 struct acpi_softc *sc = (struct acpi_softc *)context;
2613
2614 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2615
2616 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2617
2618 return_VALUE (ACPI_INTERRUPT_HANDLED);
2619 }
2620
2621 UINT32
2622 acpi_event_sleep_button_wake(void *context)
2623 {
2624 struct acpi_softc *sc = (struct acpi_softc *)context;
2625
2626 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2627
2628 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2629
2630 return_VALUE (ACPI_INTERRUPT_HANDLED);
2631 }
2632
2633 /*
2634 * XXX This static buffer is suboptimal. There is no locking so only
2635 * use this for single-threaded callers.
2636 */
2637 char *
2638 acpi_name(ACPI_HANDLE handle)
2639 {
2640 ACPI_BUFFER buf;
2641 static char data[256];
2642
2643 buf.Length = sizeof(data);
2644 buf.Pointer = data;
2645
2646 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2647 return (data);
2648 return ("(unknown)");
2649 }
2650
2651 /*
2652 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2653 * parts of the namespace.
2654 */
2655 int
2656 acpi_avoid(ACPI_HANDLE handle)
2657 {
2658 char *cp, *env, *np;
2659 int len;
2660
2661 np = acpi_name(handle);
2662 if (*np == '\\')
2663 np++;
2664 if ((env = getenv("debug.acpi.avoid")) == NULL)
2665 return (0);
2666
2667 /* Scan the avoid list checking for a match */
2668 cp = env;
2669 for (;;) {
2670 while (*cp != 0 && isspace(*cp))
2671 cp++;
2672 if (*cp == 0)
2673 break;
2674 len = 0;
2675 while (cp[len] != 0 && !isspace(cp[len]))
2676 len++;
2677 if (!strncmp(cp, np, len)) {
2678 freeenv(env);
2679 return(1);
2680 }
2681 cp += len;
2682 }
2683 freeenv(env);
2684
2685 return (0);
2686 }
2687
2688 /*
2689 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2690 */
2691 int
2692 acpi_disabled(char *subsys)
2693 {
2694 char *cp, *env;
2695 int len;
2696
2697 if ((env = getenv("debug.acpi.disabled")) == NULL)
2698 return (0);
2699 if (strcmp(env, "all") == 0) {
2700 freeenv(env);
2701 return (1);
2702 }
2703
2704 /* Scan the disable list, checking for a match. */
2705 cp = env;
2706 for (;;) {
2707 while (*cp != '\0' && isspace(*cp))
2708 cp++;
2709 if (*cp == '\0')
2710 break;
2711 len = 0;
2712 while (cp[len] != '\0' && !isspace(cp[len]))
2713 len++;
2714 if (strncmp(cp, subsys, len) == 0) {
2715 freeenv(env);
2716 return (1);
2717 }
2718 cp += len;
2719 }
2720 freeenv(env);
2721
2722 return (0);
2723 }
2724
2725 /*
2726 * Control interface.
2727 *
2728 * We multiplex ioctls for all participating ACPI devices here. Individual
2729 * drivers wanting to be accessible via /dev/acpi should use the
2730 * register/deregister interface to make their handlers visible.
2731 */
2732 struct acpi_ioctl_hook
2733 {
2734 TAILQ_ENTRY(acpi_ioctl_hook) link;
2735 u_long cmd;
2736 acpi_ioctl_fn fn;
2737 void *arg;
2738 };
2739
2740 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
2741 static int acpi_ioctl_hooks_initted;
2742
2743 int
2744 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
2745 {
2746 struct acpi_ioctl_hook *hp;
2747
2748 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
2749 return (ENOMEM);
2750 hp->cmd = cmd;
2751 hp->fn = fn;
2752 hp->arg = arg;
2753
2754 ACPI_LOCK(acpi);
2755 if (acpi_ioctl_hooks_initted == 0) {
2756 TAILQ_INIT(&acpi_ioctl_hooks);
2757 acpi_ioctl_hooks_initted = 1;
2758 }
2759 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
2760 ACPI_UNLOCK(acpi);
2761
2762 return (0);
2763 }
2764
2765 void
2766 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
2767 {
2768 struct acpi_ioctl_hook *hp;
2769
2770 ACPI_LOCK(acpi);
2771 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
2772 if (hp->cmd == cmd && hp->fn == fn)
2773 break;
2774
2775 if (hp != NULL) {
2776 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
2777 free(hp, M_ACPIDEV);
2778 }
2779 ACPI_UNLOCK(acpi);
2780 }
2781
2782 static int
2783 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2784 {
2785 return (0);
2786 }
2787
2788 static int
2789 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2790 {
2791 return (0);
2792 }
2793
2794 static int
2795 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
2796 {
2797 struct acpi_softc *sc;
2798 struct acpi_ioctl_hook *hp;
2799 int error, state;
2800
2801 error = 0;
2802 hp = NULL;
2803 sc = dev->si_drv1;
2804
2805 /*
2806 * Scan the list of registered ioctls, looking for handlers.
2807 */
2808 ACPI_LOCK(acpi);
2809 if (acpi_ioctl_hooks_initted)
2810 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
2811 if (hp->cmd == cmd)
2812 break;
2813 }
2814 ACPI_UNLOCK(acpi);
2815 if (hp)
2816 return (hp->fn(cmd, addr, hp->arg));
2817
2818 /*
2819 * Core ioctls are not permitted for non-writable user.
2820 * Currently, other ioctls just fetch information.
2821 * Not changing system behavior.
2822 */
2823 if ((flag & FWRITE) == 0)
2824 return (EPERM);
2825
2826 /* Core system ioctls. */
2827 switch (cmd) {
2828 case ACPIIO_SETSLPSTATE:
2829 error = EINVAL;
2830 state = *(int *)addr;
2831 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2832 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
2833 error = 0;
2834 break;
2835 default:
2836 error = ENXIO;
2837 break;
2838 }
2839
2840 return (error);
2841 }
2842
2843 static int
2844 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2845 {
2846 int error;
2847 struct sbuf sb;
2848 UINT8 state, TypeA, TypeB;
2849
2850 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
2851 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
2852 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
2853 sbuf_printf(&sb, "S%d ", state);
2854 sbuf_trim(&sb);
2855 sbuf_finish(&sb);
2856 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
2857 sbuf_delete(&sb);
2858 return (error);
2859 }
2860
2861 static int
2862 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2863 {
2864 char sleep_state[10];
2865 int error;
2866 u_int new_state, old_state;
2867
2868 old_state = *(u_int *)oidp->oid_arg1;
2869 if (old_state > ACPI_S_STATES_MAX + 1)
2870 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
2871 else
2872 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
2873 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
2874 if (error == 0 && req->newptr != NULL) {
2875 new_state = ACPI_STATE_S0;
2876 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
2877 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
2878 break;
2879 if (new_state <= ACPI_S_STATES_MAX + 1) {
2880 if (new_state != old_state)
2881 *(u_int *)oidp->oid_arg1 = new_state;
2882 } else
2883 error = EINVAL;
2884 }
2885
2886 return (error);
2887 }
2888
2889 /* Inform devctl(4) when we receive a Notify. */
2890 void
2891 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
2892 {
2893 char notify_buf[16];
2894 ACPI_BUFFER handle_buf;
2895 ACPI_STATUS status;
2896
2897 if (subsystem == NULL)
2898 return;
2899
2900 handle_buf.Pointer = NULL;
2901 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
2902 status = AcpiNsHandleToPathname(h, &handle_buf);
2903 if (ACPI_FAILURE(status))
2904 return;
2905 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
2906 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
2907 AcpiOsFree(handle_buf.Pointer);
2908 }
2909
2910 #ifdef ACPI_DEBUG
2911 /*
2912 * Support for parsing debug options from the kernel environment.
2913 *
2914 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2915 * by specifying the names of the bits in the debug.acpi.layer and
2916 * debug.acpi.level environment variables. Bits may be unset by
2917 * prefixing the bit name with !.
2918 */
2919 struct debugtag
2920 {
2921 char *name;
2922 UINT32 value;
2923 };
2924
2925 static struct debugtag dbg_layer[] = {
2926 {"ACPI_UTILITIES", ACPI_UTILITIES},
2927 {"ACPI_HARDWARE", ACPI_HARDWARE},
2928 {"ACPI_EVENTS", ACPI_EVENTS},
2929 {"ACPI_TABLES", ACPI_TABLES},
2930 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2931 {"ACPI_PARSER", ACPI_PARSER},
2932 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2933 {"ACPI_EXECUTER", ACPI_EXECUTER},
2934 {"ACPI_RESOURCES", ACPI_RESOURCES},
2935 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2936 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2937 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2938 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2939
2940 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2941 {"ACPI_BATTERY", ACPI_BATTERY},
2942 {"ACPI_BUS", ACPI_BUS},
2943 {"ACPI_BUTTON", ACPI_BUTTON},
2944 {"ACPI_EC", ACPI_EC},
2945 {"ACPI_FAN", ACPI_FAN},
2946 {"ACPI_POWERRES", ACPI_POWERRES},
2947 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2948 {"ACPI_THERMAL", ACPI_THERMAL},
2949 {"ACPI_TIMER", ACPI_TIMER},
2950 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2951 {NULL, 0}
2952 };
2953
2954 static struct debugtag dbg_level[] = {
2955 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2956 {"ACPI_LV_WARN", ACPI_LV_WARN},
2957 {"ACPI_LV_INIT", ACPI_LV_INIT},
2958 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2959 {"ACPI_LV_INFO", ACPI_LV_INFO},
2960 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2961
2962 /* Trace verbosity level 1 [Standard Trace Level] */
2963 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2964 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2965 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2966 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2967 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2968 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2969 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2970 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2971 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2972 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2973 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2974 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2975 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2976 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2977 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2978
2979 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2980 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2981 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2982 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2983 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2984 {"ACPI_LV_ALL", ACPI_LV_ALL},
2985
2986 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2987 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2988 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2989 {"ACPI_LV_IO", ACPI_LV_IO},
2990 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2991 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2992
2993 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2994 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2995 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2996 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2997 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2998 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2999 {NULL, 0}
3000 };
3001
3002 static void
3003 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3004 {
3005 char *ep;
3006 int i, l;
3007 int set;
3008
3009 while (*cp) {
3010 if (isspace(*cp)) {
3011 cp++;
3012 continue;
3013 }
3014 ep = cp;
3015 while (*ep && !isspace(*ep))
3016 ep++;
3017 if (*cp == '!') {
3018 set = 0;
3019 cp++;
3020 if (cp == ep)
3021 continue;
3022 } else {
3023 set = 1;
3024 }
3025 l = ep - cp;
3026 for (i = 0; tag[i].name != NULL; i++) {
3027 if (!strncmp(cp, tag[i].name, l)) {
3028 if (set)
3029 *flag |= tag[i].value;
3030 else
3031 *flag &= ~tag[i].value;
3032 }
3033 }
3034 cp = ep;
3035 }
3036 }
3037
3038 static void
3039 acpi_set_debugging(void *junk)
3040 {
3041 char *layer, *level;
3042
3043 if (cold) {
3044 AcpiDbgLayer = 0;
3045 AcpiDbgLevel = 0;
3046 }
3047
3048 layer = getenv("debug.acpi.layer");
3049 level = getenv("debug.acpi.level");
3050 if (layer == NULL && level == NULL)
3051 return;
3052
3053 printf("ACPI set debug");
3054 if (layer != NULL) {
3055 if (strcmp("NONE", layer) != 0)
3056 printf(" layer '%s'", layer);
3057 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3058 freeenv(layer);
3059 }
3060 if (level != NULL) {
3061 if (strcmp("NONE", level) != 0)
3062 printf(" level '%s'", level);
3063 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3064 freeenv(level);
3065 }
3066 printf("\n");
3067 }
3068
3069 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3070 NULL);
3071
3072 static int
3073 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3074 {
3075 int error, *dbg;
3076 struct debugtag *tag;
3077 struct sbuf sb;
3078
3079 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3080 return (ENOMEM);
3081 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3082 tag = &dbg_layer[0];
3083 dbg = &AcpiDbgLayer;
3084 } else {
3085 tag = &dbg_level[0];
3086 dbg = &AcpiDbgLevel;
3087 }
3088
3089 /* Get old values if this is a get request. */
3090 ACPI_SERIAL_BEGIN(acpi);
3091 if (*dbg == 0) {
3092 sbuf_cpy(&sb, "NONE");
3093 } else if (req->newptr == NULL) {
3094 for (; tag->name != NULL; tag++) {
3095 if ((*dbg & tag->value) == tag->value)
3096 sbuf_printf(&sb, "%s ", tag->name);
3097 }
3098 }
3099 sbuf_trim(&sb);
3100 sbuf_finish(&sb);
3101
3102 /* Copy out the old values to the user. */
3103 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3104 sbuf_delete(&sb);
3105
3106 /* If the user is setting a string, parse it. */
3107 if (error == 0 && req->newptr != NULL) {
3108 *dbg = 0;
3109 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3110 acpi_set_debugging(NULL);
3111 }
3112 ACPI_SERIAL_END(acpi);
3113
3114 return (error);
3115 }
3116
3117 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3118 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3119 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3120 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3121 #endif /* ACPI_DEBUG */
3122
3123 static int
3124 acpi_pm_func(u_long cmd, void *arg, ...)
3125 {
3126 int state, acpi_state;
3127 int error;
3128 struct acpi_softc *sc;
3129 va_list ap;
3130
3131 error = 0;
3132 switch (cmd) {
3133 case POWER_CMD_SUSPEND:
3134 sc = (struct acpi_softc *)arg;
3135 if (sc == NULL) {
3136 error = EINVAL;
3137 goto out;
3138 }
3139
3140 va_start(ap, arg);
3141 state = va_arg(ap, int);
3142 va_end(ap);
3143
3144 switch (state) {
3145 case POWER_SLEEP_STATE_STANDBY:
3146 acpi_state = sc->acpi_standby_sx;
3147 break;
3148 case POWER_SLEEP_STATE_SUSPEND:
3149 acpi_state = sc->acpi_suspend_sx;
3150 break;
3151 case POWER_SLEEP_STATE_HIBERNATE:
3152 acpi_state = ACPI_STATE_S4;
3153 break;
3154 default:
3155 error = EINVAL;
3156 goto out;
3157 }
3158
3159 acpi_SetSleepState(sc, acpi_state);
3160 break;
3161 default:
3162 error = EINVAL;
3163 goto out;
3164 }
3165
3166 out:
3167 return (error);
3168 }
3169
3170 static void
3171 acpi_pm_register(void *arg)
3172 {
3173 if (!cold || resource_disabled("acpi", 0))
3174 return;
3175
3176 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3177 }
3178
3179 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: f806ae45737e3408abeac18564ee9017
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