1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2009-2010, Intel Corporation.
23 * All rights reserved.
24 */
25
26 /*
27 * Platform specific device enumerator for ACPI specific devices.
28 * "x86 system devices" refers to the suite of hardware components which are
29 * common to the x86 platform and play important roles in the system
30 * architecture but can't be enumerated/discovered through industry-standard
31 * bus specifications. Examples of these x86 system devices include:
32 * * Logical processor/CPU
33 * * Memory device
34 * * Non-PCI discoverable IOMMU or DMA Remapping Engine
35 * * Non-PCI discoverable IOxAPIC
36 * * Non-PCI discoverable HPET (High Precision Event Timer)
37 * * ACPI defined devices, including power button, sleep button, battery etc.
38 *
39 * X86 system devices may be discovered through BIOS/Firmware interfaces, such
40 * as SMBIOS tables, MPS tables and ACPI tables since their discovery isn't
41 * covered by any industry-standard bus specifications.
42 *
43 * In order to aid Solaris in flexibly managing x86 system devices,
44 * x86 system devices are placed into a specific firmware device
45 * subtree whose device path is '/devices/fw'.
46 *
47 * This driver populates the firmware device subtree with ACPI-discoverable
48 * system devices if possible. To achieve that, the ACPI object
49 * namespace is abstracted as ACPI virtual buses which host system devices.
50 * Another nexus driver for the ACPI virtual bus will manage all devices
51 * connected to it.
52 *
53 * For more detailed information, please refer to PSARC/2009/104.
54 */
55
56 #include <sys/types.h>
57 #include <sys/bitmap.h>
58 #include <sys/cmn_err.h>
59 #include <sys/ddi_subrdefs.h>
60 #include <sys/errno.h>
61 #include <sys/modctl.h>
62 #include <sys/mutex.h>
63 #include <sys/note.h>
64 #include <sys/obpdefs.h>
65 #include <sys/sunddi.h>
66 #include <sys/sunndi.h>
67 #include <sys/acpi/acpi.h>
68 #include <sys/acpica.h>
69 #include <sys/acpidev.h>
70 #include <sys/acpidev_dr.h>
71 #include <sys/acpidev_impl.h>
72
73 /* Patchable through /etc/system */
74 int acpidev_options = 0;
75 int acpidev_debug = 0;
76
77 krwlock_t acpidev_class_lock;
78 acpidev_class_list_t *acpidev_class_list_root = NULL;
79 ulong_t acpidev_object_type_mask[BT_BITOUL(ACPI_TYPE_NS_NODE_MAX + 1)];
80
81 /* ACPI device autoconfig global status */
82 typedef enum acpidev_status {
83 ACPIDEV_STATUS_FAILED = -2, /* ACPI device autoconfig failed */
84 ACPIDEV_STATUS_DISABLED = -1, /* ACPI device autoconfig disabled */
85 ACPIDEV_STATUS_UNKNOWN = 0, /* initial status */
86 ACPIDEV_STATUS_INITIALIZED, /* ACPI device autoconfig initialized */
87 ACPIDEV_STATUS_FIRST_PASS, /* first probing finished */
88 ACPIDEV_STATUS_READY /* second probing finished */
89 } acpidev_status_t;
90
91 static acpidev_status_t acpidev_status = ACPIDEV_STATUS_UNKNOWN;
92 static kmutex_t acpidev_drv_lock;
93 static dev_info_t *acpidev_root_dip = NULL;
94
95 /* Boot time ACPI device enumerator. */
96 static void acpidev_boot_probe(int type);
97
98 /* DDI module auto configuration interface */
99 extern struct mod_ops mod_miscops;
100
101 static struct modlmisc modlmisc = {
102 &mod_miscops,
103 "ACPI device enumerator"
104 };
105
106 static struct modlinkage modlinkage = {
107 MODREV_1,
108 (void *)&modlmisc,
109 NULL
110 };
111
112 int
113 _init(void)
114 {
115 int err;
116
117 if ((err = mod_install(&modlinkage)) == 0) {
118 bzero(acpidev_object_type_mask,
119 sizeof (acpidev_object_type_mask));
120 mutex_init(&acpidev_drv_lock, NULL, MUTEX_DRIVER, NULL);
121 rw_init(&acpidev_class_lock, NULL, RW_DEFAULT, NULL);
122 acpidev_dr_init();
123 impl_bus_add_probe(acpidev_boot_probe);
124 } else {
125 cmn_err(CE_WARN, "!acpidev: failed to install driver.");
126 }
127
128 return (err);
129 }
130
131 int
132 _fini(void)
133 {
134 /* No support for module unload. */
135 return (EBUSY);
136 }
137
138 int
139 _info(struct modinfo *modinfop)
140 {
141 return (mod_info(&modlinkage, modinfop));
142 }
143
144 /* Check blacklists and load platform specific driver modules. */
145 static ACPI_STATUS
146 acpidev_load_plat_modules(void)
147 {
148 return (AE_OK);
149 }
150
151 /* Unload platform specific driver modules. */
152 static void
153 acpidev_unload_plat_modules(void)
154 {
155 }
156
157 /* Unregister all device class drivers from the device driver lists. */
158 static void
159 acpidev_class_list_fini(void)
160 {
161 acpidev_unload_plat_modules();
162
163 if ((acpidev_options & ACPIDEV_OUSER_NO_PCI) == 0) {
164 (void) acpidev_unregister_class(&acpidev_class_list_scope,
165 &acpidev_class_pci);
166 (void) acpidev_unregister_class(&acpidev_class_list_device,
167 &acpidev_class_pci);
168 }
169
170 if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
171 (void) acpidev_unregister_class(&acpidev_class_list_device,
172 &acpidev_class_memory);
173 }
174
175 if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
176 (void) acpidev_unregister_class(&acpidev_class_list_device,
177 &acpidev_class_cpu);
178 (void) acpidev_unregister_class(&acpidev_class_list_scope,
179 &acpidev_class_cpu);
180 (void) acpidev_unregister_class(&acpidev_class_list_root,
181 &acpidev_class_cpu);
182 }
183
184 if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
185 (void) acpidev_unregister_class(&acpidev_class_list_device,
186 &acpidev_class_container);
187 }
188
189 (void) acpidev_unregister_class(&acpidev_class_list_device,
190 &acpidev_class_device);
191 (void) acpidev_unregister_class(&acpidev_class_list_root,
192 &acpidev_class_device);
193
194 (void) acpidev_unregister_class(&acpidev_class_list_root,
195 &acpidev_class_scope);
196 }
197
198 /* Register all device class drivers onto the driver lists. */
199 static ACPI_STATUS
200 acpidev_class_list_init(uint64_t *fp)
201 {
202 ACPI_STATUS rc = AE_OK;
203
204 /* Set bit in mask for supported object types. */
205 BT_SET(acpidev_object_type_mask, ACPI_TYPE_LOCAL_SCOPE);
206 BT_SET(acpidev_object_type_mask, ACPI_TYPE_DEVICE);
207
208 /*
209 * Register the ACPI scope class driver onto the class driver lists.
210 * Currently only ACPI scope objects under ACPI root node, such as _PR,
211 * _SB, _TZ etc, need to be handled, so only register the scope class
212 * driver onto the root list.
213 */
214 if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_root,
215 &acpidev_class_scope, B_FALSE))) {
216 goto error_out;
217 }
218
219 /*
220 * Register the ACPI device class driver onto the class driver lists.
221 * The ACPI device class driver should be registered at the tail to
222 * handle all device objects which haven't been handled by other
223 * HID/CID specific device class drivers.
224 */
225 if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_root,
226 &acpidev_class_device, B_TRUE))) {
227 goto error_root_device;
228 }
229 if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_device,
230 &acpidev_class_device, B_TRUE))) {
231 goto error_device_device;
232 }
233
234 /* Check and register support for ACPI container device. */
235 if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
236 if (ACPI_FAILURE(acpidev_register_class(
237 &acpidev_class_list_device, &acpidev_class_container,
238 B_FALSE))) {
239 goto error_device_container;
240 }
241 *fp |= ACPI_DEVCFG_CONTAINER;
242 }
243
244 /* Check and register support for ACPI CPU device. */
245 if ((acpidev_options & ACPIDEV_OUSER_NO_CPU) == 0) {
246 /* Handle ACPI CPU Device */
247 if (ACPI_FAILURE(acpidev_register_class(
248 &acpidev_class_list_device, &acpidev_class_cpu, B_FALSE))) {
249 goto error_device_cpu;
250 }
251 /* Handle ACPI Processor under _PR */
252 if (ACPI_FAILURE(acpidev_register_class(
253 &acpidev_class_list_scope, &acpidev_class_cpu, B_FALSE))) {
254 goto error_scope_cpu;
255 }
256 /* House-keeping for CPU scan */
257 if (ACPI_FAILURE(acpidev_register_class(
258 &acpidev_class_list_root, &acpidev_class_cpu, B_FALSE))) {
259 goto error_root_cpu;
260 }
261 BT_SET(acpidev_object_type_mask, ACPI_TYPE_PROCESSOR);
262 *fp |= ACPI_DEVCFG_CPU;
263 }
264
265 /* Check support of ACPI memory devices. */
266 if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
267 /*
268 * Register the ACPI memory class driver onto the
269 * acpidev_class_list_device list because ACPI module
270 * class driver uses that list.
271 */
272 if (ACPI_FAILURE(acpidev_register_class(
273 &acpidev_class_list_device, &acpidev_class_memory,
274 B_FALSE))) {
275 goto error_device_memory;
276 }
277 *fp |= ACPI_DEVCFG_MEMORY;
278 }
279
280 /* Check support of PCI/PCIex Host Bridge devices. */
281 if ((acpidev_options & ACPIDEV_OUSER_NO_PCI) == 0) {
282 /*
283 * Register pci/pciex class drivers onto
284 * the acpidev_class_list_device class list because ACPI
285 * module class driver uses that list.
286 */
287 if (ACPI_FAILURE(acpidev_register_class(
288 &acpidev_class_list_device, &acpidev_class_pci,
289 B_FALSE))) {
290 goto error_device_pci;
291 }
292
293 /*
294 * Register pci/pciex class drivers onto the
295 * acpidev_class_list_scope class list.
296 */
297 if (ACPI_FAILURE(acpidev_register_class(
298 &acpidev_class_list_scope, &acpidev_class_pci,
299 B_FALSE))) {
300 goto error_scope_pci;
301 }
302
303 *fp |= ACPI_DEVCFG_PCI;
304 }
305
306 /* Check blacklist and load platform specific modules. */
307 rc = acpidev_load_plat_modules();
308 if (ACPI_FAILURE(rc)) {
309 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to check blacklist "
310 "or load pratform modules.");
311 goto error_plat;
312 }
313
314 return (AE_OK);
315
316 error_plat:
317 if ((acpidev_options & ACPIDEV_OUSER_NO_PCI) == 0) {
318 (void) acpidev_unregister_class(&acpidev_class_list_scope,
319 &acpidev_class_pci);
320 }
321 error_scope_pci:
322 if ((acpidev_options & ACPIDEV_OUSER_NO_PCI) == 0) {
323 (void) acpidev_unregister_class(&acpidev_class_list_device,
324 &acpidev_class_pci);
325 }
326 error_device_pci:
327 if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
328 (void) acpidev_unregister_class(&acpidev_class_list_device,
329 &acpidev_class_memory);
330 }
331 error_device_memory:
332 if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
333 (void) acpidev_unregister_class(&acpidev_class_list_root,
334 &acpidev_class_cpu);
335 }
336 error_root_cpu:
337 if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
338 (void) acpidev_unregister_class(&acpidev_class_list_scope,
339 &acpidev_class_cpu);
340 }
341 error_scope_cpu:
342 if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
343 (void) acpidev_unregister_class(&acpidev_class_list_device,
344 &acpidev_class_cpu);
345 }
346 error_device_cpu:
347 if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
348 (void) acpidev_unregister_class(&acpidev_class_list_device,
349 &acpidev_class_container);
350 }
351 error_device_container:
352 (void) acpidev_unregister_class(&acpidev_class_list_device,
353 &acpidev_class_device);
354 error_device_device:
355 (void) acpidev_unregister_class(&acpidev_class_list_root,
356 &acpidev_class_device);
357 error_root_device:
358 (void) acpidev_unregister_class(&acpidev_class_list_root,
359 &acpidev_class_scope);
360 error_out:
361 ACPIDEV_DEBUG(CE_WARN,
362 "!acpidev: failed to register built-in class drivers.");
363 *fp = 0;
364
365 return (AE_ERROR);
366 }
367
368 /*
369 * Called in single threaded context during boot, no protection for
370 * reentrance.
371 */
372 static ACPI_STATUS
373 acpidev_create_root_node(void)
374 {
375 int circ, rv = AE_OK;
376 dev_info_t *dip = NULL;
377 acpidev_data_handle_t objhdl;
378 char *compatibles[] = {
379 ACPIDEV_HID_ROOTNEX,
380 ACPIDEV_TYPE_ROOTNEX,
381 ACPIDEV_HID_VIRTNEX,
382 ACPIDEV_TYPE_VIRTNEX,
383 };
384
385 ndi_devi_enter(ddi_root_node(), &circ);
386 ASSERT(acpidev_root_dip == NULL);
387
388 /* Query whether device node already exists. */
389 dip = ddi_find_devinfo(ACPIDEV_NODE_NAME_ROOT, -1, 0);
390 if (dip != NULL && ddi_get_parent(dip) == ddi_root_node()) {
391 ndi_devi_exit(ddi_root_node(), circ);
392 cmn_err(CE_WARN, "!acpidev: node /devices/%s already exists, "
393 "disable driver.", ACPIDEV_NODE_NAME_ROOT);
394 return (AE_ALREADY_EXISTS);
395 }
396
397 /* Create the device node if it doesn't exist. */
398 rv = ndi_devi_alloc(ddi_root_node(), ACPIDEV_NODE_NAME_ROOT,
399 (pnode_t)DEVI_SID_NODEID, &dip);
400 if (rv != NDI_SUCCESS) {
401 ndi_devi_exit(ddi_root_node(), circ);
402 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to create device node "
403 "for ACPI root with errcode %d.", rv);
404 return (AE_ERROR);
405 }
406
407 /* Build cross reference between dip and ACPI object. */
408 if (ACPI_FAILURE(acpica_tag_devinfo(dip, ACPI_ROOT_OBJECT))) {
409 (void) ddi_remove_child(dip, 0);
410 ndi_devi_exit(ddi_root_node(), circ);
411 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to tag object %s.",
412 ACPIDEV_OBJECT_NAME_SB);
413 return (AE_ERROR);
414 }
415
416 /* Set device properties. */
417 rv = ndi_prop_update_string_array(DDI_DEV_T_NONE, dip,
418 OBP_COMPATIBLE, ACPIDEV_ARRAY_PARAM(compatibles));
419 if (rv == NDI_SUCCESS) {
420 rv = ndi_prop_update_string(DDI_DEV_T_NONE, dip,
421 OBP_DEVICETYPE, ACPIDEV_TYPE_ROOTNEX);
422 }
423 if (rv != DDI_SUCCESS) {
424 ACPIDEV_DEBUG(CE_WARN,
425 "!acpidev: failed to set device property for /devices/%s.",
426 ACPIDEV_NODE_NAME_ROOT);
427 goto error_out;
428 }
429
430 /* Manually create an object handle for the root node */
431 objhdl = acpidev_data_create_handle(ACPI_ROOT_OBJECT);
432 if (objhdl == NULL) {
433 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to create object "
434 "handle for the root node.");
435 goto error_out;
436 }
437 objhdl->aod_level = 0;
438 objhdl->aod_hdl = ACPI_ROOT_OBJECT;
439 objhdl->aod_dip = dip;
440 objhdl->aod_class = &acpidev_class_scope;
441 objhdl->aod_status = acpidev_query_device_status(ACPI_ROOT_OBJECT);
442 objhdl->aod_iflag = ACPIDEV_ODF_STATUS_VALID |
443 ACPIDEV_ODF_DEVINFO_CREATED | ACPIDEV_ODF_DEVINFO_TAGGED;
444
445 /* Bind device driver. */
446 (void) ndi_devi_bind_driver(dip, 0);
447
448 acpidev_root_dip = dip;
449 ndi_devi_exit(ddi_root_node(), circ);
450
451 return (AE_OK);
452
453 error_out:
454 (void) acpica_untag_devinfo(dip, ACPI_ROOT_OBJECT);
455 (void) ddi_remove_child(dip, 0);
456 ndi_devi_exit(ddi_root_node(), circ);
457 return (AE_ERROR);
458 }
459
460 static void
461 acpidev_initialize(void)
462 {
463 int rc;
464 char *str = NULL;
465 uint64_t features = 0;
466
467 /* Check whether it has already been initialized. */
468 if (acpidev_status == ACPIDEV_STATUS_DISABLED) {
469 cmn_err(CE_CONT, "?acpidev: ACPI device autoconfig "
470 "disabled by user.\n");
471 return;
472 } else if (acpidev_status != ACPIDEV_STATUS_UNKNOWN) {
473 ACPIDEV_DEBUG(CE_NOTE,
474 "!acpidev: initialization called more than once.");
475 return;
476 }
477
478 /* Check whether ACPI device autoconfig has been disabled by user. */
479 rc = ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
480 DDI_PROP_DONTPASS, "acpidev-autoconfig", &str);
481 if (rc == DDI_SUCCESS) {
482 if (strcasecmp(str, "off") == 0 || strcasecmp(str, "no") == 0) {
483 cmn_err(CE_CONT, "?acpidev: ACPI device autoconfig "
484 "disabled by user.\n");
485 ddi_prop_free(str);
486 acpidev_status = ACPIDEV_STATUS_DISABLED;
487 return;
488 }
489 ddi_prop_free(str);
490 }
491
492 /* Initialize acpica subsystem. */
493 if (ACPI_FAILURE(acpica_init())) {
494 cmn_err(CE_WARN,
495 "!acpidev: failed to initialize acpica subsystem.");
496 acpidev_status = ACPIDEV_STATUS_FAILED;
497 return;
498 }
499
500 /* Check ACPICA subsystem status. */
501 if (!acpica_get_core_feature(ACPI_FEATURE_FULL_INIT)) {
502 cmn_err(CE_WARN, "!acpidev: ACPICA hasn't been fully "
503 "initialized, ACPI device autoconfig will be disabled.");
504 acpidev_status = ACPIDEV_STATUS_DISABLED;
505 return;
506 }
507
508 /* Converts acpidev-options from type string to int, if any */
509 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
510 DDI_PROP_DONTPASS, "acpidev-options", &str) == DDI_PROP_SUCCESS) {
511 long data;
512 rc = ddi_strtol(str, NULL, 0, &data);
513 if (rc == 0) {
514 (void) e_ddi_prop_remove(DDI_DEV_T_NONE,
515 ddi_root_node(), "acpidev-options");
516 (void) e_ddi_prop_update_int(DDI_DEV_T_NONE,
517 ddi_root_node(), "acpidev-options", data);
518 }
519 ddi_prop_free(str);
520 }
521 /* Get acpidev_options user options. */
522 acpidev_options = ddi_prop_get_int(DDI_DEV_T_ANY, ddi_root_node(),
523 DDI_PROP_DONTPASS, "acpidev-options", acpidev_options);
524
525 /* Check whether ACPI based DR has been disabled by user. */
526 rc = ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
527 DDI_PROP_DONTPASS, "acpidev-dr", &str);
528 if (rc == DDI_SUCCESS) {
529 if (strcasecmp(str, "off") == 0 || strcasecmp(str, "no") == 0) {
530 cmn_err(CE_CONT, "?acpidev: ACPI based DR has been "
531 "disabled by user.\n");
532 acpidev_dr_enable = 0;
533 }
534 ddi_prop_free(str);
535 }
536
537 /* Register all device class drivers. */
538 if (ACPI_FAILURE(acpidev_class_list_init(&features))) {
539 cmn_err(CE_WARN,
540 "!acpidev: failed to initalize class driver lists.");
541 acpidev_status = ACPIDEV_STATUS_FAILED;
542 return;
543 }
544
545 /* Create root node for ACPI/firmware device subtree. */
546 if (ACPI_FAILURE(acpidev_create_root_node())) {
547 cmn_err(CE_WARN, "!acpidev: failed to create root node "
548 "for acpi device tree.");
549 acpidev_class_list_fini();
550 acpidev_status = ACPIDEV_STATUS_FAILED;
551 return;
552 }
553
554 /* Notify acpica to enable ACPI device auto configuration. */
555 acpica_set_core_feature(ACPI_FEATURE_DEVCFG);
556 acpica_set_devcfg_feature(features);
557
558 ACPIDEV_DEBUG(CE_NOTE, "!acpidev: ACPI device autoconfig initialized.");
559 acpidev_status = ACPIDEV_STATUS_INITIALIZED;
560 }
561
562 /*
563 * Probe devices in ACPI namespace which can't be enumerated by other methods
564 * at boot time.
565 */
566 static ACPI_STATUS
567 acpidev_boot_probe_device(acpidev_op_type_t op_type)
568 {
569 ACPI_STATUS rc = AE_OK;
570 acpidev_walk_info_t *infop;
571
572 ASSERT(acpidev_root_dip != NULL);
573 ASSERT(op_type == ACPIDEV_OP_BOOT_PROBE ||
574 op_type == ACPIDEV_OP_BOOT_REPROBE);
575
576 infop = acpidev_alloc_walk_info(op_type, 0, ACPI_ROOT_OBJECT,
577 &acpidev_class_list_root, NULL);
578 if (infop == NULL) {
579 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to allocate walk info "
580 "object in acpi_boot_probe_device().");
581 return (AE_ERROR);
582 }
583 /* Enumerate ACPI devices. */
584 rc = acpidev_probe_child(infop);
585 if (ACPI_FAILURE(rc)) {
586 cmn_err(CE_WARN, "!acpidev: failed to probe child object "
587 "under ACPI root node.");
588 }
589 acpidev_free_walk_info(infop);
590
591 return (rc);
592 }
593
594 /*
595 * Platform specific device prober for ACPI virtual bus.
596 * It will be called in single-threaded environment to enumerate devices in
597 * ACPI namespace at boot time.
598 */
599 static void
600 acpidev_boot_probe(int type)
601 {
602 ACPI_STATUS rc;
603
604 /* Initialize subsystem on first pass. */
605 mutex_enter(&acpidev_drv_lock);
606 if (type == 0) {
607 acpidev_initialize();
608 if (acpidev_status != ACPIDEV_STATUS_INITIALIZED &&
609 acpidev_status != ACPIDEV_STATUS_DISABLED) {
610 cmn_err(CE_WARN, "!acpidev: driver disabled due to "
611 "initalization failure.");
612 }
613 }
614
615 /* Probe ACPI devices */
616 if (type == 0 && acpidev_status == ACPIDEV_STATUS_INITIALIZED) {
617 rc = acpidev_boot_probe_device(ACPIDEV_OP_BOOT_PROBE);
618 if (ACPI_SUCCESS(rc)) {
619 /*
620 * Support of DR operations will be disabled
621 * if failed to initialize DR subsystem.
622 */
623 rc = acpidev_dr_initialize(acpidev_root_dip);
624 if (ACPI_FAILURE(rc) && rc != AE_SUPPORT) {
625 cmn_err(CE_CONT, "?acpidev: failed to "
626 "initialize DR subsystem.");
627 }
628 acpidev_status = ACPIDEV_STATUS_FIRST_PASS;
629 } else {
630 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to probe ACPI "
631 "devices during boot.");
632 acpidev_status = ACPIDEV_STATUS_FAILED;
633 }
634 } else if (type != 0 && acpidev_status == ACPIDEV_STATUS_FIRST_PASS) {
635 rc = acpidev_boot_probe_device(ACPIDEV_OP_BOOT_REPROBE);
636 if (ACPI_SUCCESS(rc)) {
637 acpidev_status = ACPIDEV_STATUS_READY;
638 } else {
639 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to reprobe "
640 "ACPI devices during boot.");
641 acpidev_status = ACPIDEV_STATUS_FAILED;
642 }
643 } else if (acpidev_status != ACPIDEV_STATUS_FAILED &&
644 acpidev_status != ACPIDEV_STATUS_DISABLED &&
645 acpidev_status != ACPIDEV_STATUS_READY) {
646 cmn_err(CE_WARN,
647 "!acpidev: invalid ACPI device autoconfig global status.");
648 }
649 mutex_exit(&acpidev_drv_lock);
650 }
651
652 ACPI_STATUS
653 acpidev_probe_child(acpidev_walk_info_t *infop)
654 {
655 int circ;
656 dev_info_t *pdip;
657 ACPI_STATUS res, rc = AE_OK;
658 ACPI_HANDLE child;
659 ACPI_OBJECT_TYPE type;
660 acpidev_class_list_t *it;
661 acpidev_walk_info_t *cinfop;
662 acpidev_data_handle_t datap;
663
664 /* Validate parameter first. */
665 ASSERT(infop != NULL);
666 if (infop == NULL) {
667 ACPIDEV_DEBUG(CE_WARN,
668 "!acpidev: infop is NULL in acpidev_probe_child().");
669 return (AE_BAD_PARAMETER);
670 }
671 ASSERT(infop->awi_level < ACPIDEV_MAX_ENUM_LEVELS - 1);
672 if (infop->awi_level >= ACPIDEV_MAX_ENUM_LEVELS - 1) {
673 ACPIDEV_DEBUG(CE_WARN, "!acpidev: recursive level is too deep "
674 "in acpidev_probe_child().");
675 return (AE_BAD_PARAMETER);
676 }
677 ASSERT(infop->awi_class_list != NULL);
678 ASSERT(infop->awi_hdl != NULL);
679 ASSERT(infop->awi_info != NULL);
680 ASSERT(infop->awi_name != NULL);
681 ASSERT(infop->awi_data != NULL);
682 if (infop->awi_class_list == NULL || infop->awi_hdl == NULL ||
683 infop->awi_info == NULL || infop->awi_name == NULL ||
684 infop->awi_data == NULL) {
685 ACPIDEV_DEBUG(CE_WARN, "!acpidev: infop has NULL fields in "
686 "acpidev_probe_child().");
687 return (AE_BAD_PARAMETER);
688 }
689 pdip = acpidev_walk_info_get_pdip(infop);
690 if (pdip == NULL) {
691 ACPIDEV_DEBUG(CE_WARN,
692 "!acpidev: pdip is NULL in acpidev_probe_child().");
693 return (AE_BAD_PARAMETER);
694 }
695
696 ndi_devi_enter(pdip, &circ);
697 rw_enter(&acpidev_class_lock, RW_READER);
698
699 /* Call pre-probe callback functions. */
700 for (it = *(infop->awi_class_list); it != NULL; it = it->acl_next) {
701 if (it->acl_class->adc_pre_probe == NULL) {
702 continue;
703 }
704 infop->awi_class_curr = it->acl_class;
705 if (ACPI_FAILURE(it->acl_class->adc_pre_probe(infop))) {
706 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to pre-probe "
707 "device of type %s under %s.",
708 it->acl_class->adc_class_name, infop->awi_name);
709 }
710 }
711
712 /* Walk child objects. */
713 child = NULL;
714 while (ACPI_SUCCESS(AcpiGetNextObject(ACPI_TYPE_ANY,
715 infop->awi_hdl, child, &child))) {
716 /* Skip object if we're not interested in it. */
717 if (ACPI_FAILURE(AcpiGetType(child, &type)) ||
718 type > ACPI_TYPE_NS_NODE_MAX ||
719 BT_TEST(acpidev_object_type_mask, type) == 0) {
720 continue;
721 }
722
723 /* It's another hotplug-capable board, skip it. */
724 if (infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE &&
725 acpidev_dr_device_is_board(child)) {
726 continue;
727 }
728
729 /* Allocate the walk info structure. */
730 cinfop = acpidev_alloc_walk_info(infop->awi_op_type,
731 infop->awi_level + 1, child, NULL, infop);
732 if (cinfop == NULL) {
733 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to allocate "
734 "walk info child object of %s.",
735 infop->awi_name);
736 /* Mark error and continue to handle next child. */
737 rc = AE_ERROR;
738 continue;
739 }
740
741 /*
742 * Remember the class list used to handle this object.
743 * It should be the same list for different passes of scans.
744 */
745 ASSERT(cinfop->awi_data != NULL);
746 datap = cinfop->awi_data;
747 if (cinfop->awi_op_type == ACPIDEV_OP_BOOT_PROBE) {
748 datap->aod_class_list = infop->awi_class_list;
749 }
750
751 /* Call registered process callbacks. */
752 for (it = *(infop->awi_class_list); it != NULL;
753 it = it->acl_next) {
754 if (it->acl_class->adc_probe == NULL) {
755 continue;
756 }
757 cinfop->awi_class_curr = it->acl_class;
758 res = it->acl_class->adc_probe(cinfop);
759 if (ACPI_FAILURE(res)) {
760 rc = res;
761 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to "
762 "process object of type %s under %s.",
763 it->acl_class->adc_class_name,
764 infop->awi_name);
765 }
766 }
767
768 /* Free resources. */
769 acpidev_free_walk_info(cinfop);
770 }
771
772 /* Call post-probe callback functions. */
773 for (it = *(infop->awi_class_list); it != NULL; it = it->acl_next) {
774 if (it->acl_class->adc_post_probe == NULL) {
775 continue;
776 }
777 infop->awi_class_curr = it->acl_class;
778 if (ACPI_FAILURE(it->acl_class->adc_post_probe(infop))) {
779 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to post-probe "
780 "device of type %s under %s.",
781 it->acl_class->adc_class_name, infop->awi_name);
782 }
783 }
784
785 rw_exit(&acpidev_class_lock);
786 ndi_devi_exit(pdip, circ);
787
788 return (rc);
789 }
790
791 ACPI_STATUS
792 acpidev_process_object(acpidev_walk_info_t *infop, int flags)
793 {
794 ACPI_STATUS rc = AE_OK;
795 char *devname;
796 dev_info_t *dip, *pdip;
797 ACPI_HANDLE hdl;
798 ACPI_DEVICE_INFO *adip;
799 acpidev_class_t *clsp;
800 acpidev_data_handle_t datap;
801 acpidev_filter_result_t res;
802
803 /* Validate parameters first. */
804 ASSERT(infop != NULL);
805 if (infop == NULL) {
806 ACPIDEV_DEBUG(CE_WARN,
807 "!acpidev: infop is NULL in acpidev_process_object().");
808 return (AE_BAD_PARAMETER);
809 }
810 ASSERT(infop->awi_hdl != NULL);
811 ASSERT(infop->awi_info != NULL);
812 ASSERT(infop->awi_data != NULL);
813 ASSERT(infop->awi_class_curr != NULL);
814 ASSERT(infop->awi_class_curr->adc_filter != NULL);
815 hdl = infop->awi_hdl;
816 adip = infop->awi_info;
817 datap = infop->awi_data;
818 clsp = infop->awi_class_curr;
819 if (hdl == NULL || datap == NULL || adip == NULL || clsp == NULL ||
820 clsp->adc_filter == NULL) {
821 ACPIDEV_DEBUG(CE_WARN, "!acpidev: infop has NULL pointer in "
822 "acpidev_process_object().");
823 return (AE_BAD_PARAMETER);
824 }
825 pdip = acpidev_walk_info_get_pdip(infop);
826 if (pdip == NULL) {
827 ACPIDEV_DEBUG(CE_WARN, "!acpidev: failed to get pdip for %s "
828 "in acpidev_process_object().", infop->awi_name);
829 return (AE_BAD_PARAMETER);
830 }
831
832 /*
833 * Check whether the object has already been handled.
834 * Tag and child dip pointer are used to indicate the object has been
835 * handled by the ACPI auto configure driver. It has the
836 * following usages:
837 * 1) Prevent creating dip for objects which already have a dip
838 * when reloading the ACPI auto configure driver.
839 * 2) Prevent creating multiple dips for ACPI objects with ACPI
840 * aliases. Currently ACPICA framework has no way to tell whether
841 * an object is an alias or not for some types of object. So tag
842 * is used to indicate that the object has been handled.
843 * 3) Prevent multiple class drivers from creating multiple devices for
844 * the same ACPI object.
845 */
846 if ((flags & ACPIDEV_PROCESS_FLAG_CREATE) &&
847 (flags & ACPIDEV_PROCESS_FLAG_CHECK) &&
848 !(infop->awi_flags & ACPIDEV_WI_DISABLE_CREATE) &&
849 (infop->awi_flags & ACPIDEV_WI_DEVICE_CREATED)) {
850 ASSERT(infop->awi_dip != NULL);
851 ACPIDEV_DEBUG(CE_NOTE,
852 "!acpidev: device has already been created for object %s.",
853 infop->awi_name);
854 return (AE_ALREADY_EXISTS);
855 }
856
857 /*
858 * Determine action according to following rules based on device
859 * status returned by _STA method. Please refer to ACPI3.0b section
860 * 6.3.1 and 6.5.1.
861 * present functioning enabled Action
862 * 0 0 x Do nothing
863 * 1 x 0 Do nothing
864 * 1 x 1 Create node and scan child
865 * x 1 0 Do nothing
866 * x 1 1 Create node and scan child
867 */
868 if ((datap->aod_iflag & ACPIDEV_ODF_STATUS_VALID) == 0 ||
869 (flags & ACPIDEV_PROCESS_FLAG_SYNCSTATUS)) {
870 if (adip->Valid & ACPI_VALID_STA) {
871 datap->aod_status = adip->CurrentStatus;
872 } else {
873 datap->aod_status = acpidev_query_device_status(hdl);
874 }
875 datap->aod_iflag |= ACPIDEV_ODF_STATUS_VALID;
876 }
877 if (!acpidev_check_device_enabled(datap->aod_status)) {
878 ACPIDEV_DEBUG(CE_NOTE, "!acpidev: object %s doesn't exist.",
879 infop->awi_name);
880 /*
881 * Need to scan for hotplug-capable boards even if object
882 * doesn't exist or has been disabled during the first pass.
883 * So just disable creating device node and keep on scanning.
884 */
885 if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE) {
886 flags &= ~ACPIDEV_PROCESS_FLAG_CREATE;
887 } else {
888 return (AE_NOT_EXIST);
889 }
890 }
891
892 ASSERT(infop->awi_data != NULL);
893 ASSERT(infop->awi_parent != NULL);
894 ASSERT(infop->awi_parent->awi_data != NULL);
895 if (flags & ACPIDEV_PROCESS_FLAG_CREATE) {
896 mutex_enter(&(DEVI(pdip)->devi_lock));
897 /*
898 * Put the device into offline state if its parent is in
899 * offline state.
900 */
901 if (DEVI_IS_DEVICE_OFFLINE(pdip)) {
902 flags |= ACPIDEV_PROCESS_FLAG_OFFLINE;
903 }
904 mutex_exit(&(DEVI(pdip)->devi_lock));
905 }
906
907 /* Evaluate filtering rules and generate device name. */
908 devname = kmem_zalloc(ACPIDEV_MAX_NAMELEN + 1, KM_SLEEP);
909 (void) memcpy(devname, (char *)&adip->Name, sizeof (adip->Name));
910 if (flags & ACPIDEV_PROCESS_FLAG_CREATE) {
911 res = clsp->adc_filter(infop, devname, ACPIDEV_MAX_NAMELEN);
912 } else {
913 res = clsp->adc_filter(infop, NULL, 0);
914 }
915
916 /* Create device if requested. */
917 if ((flags & ACPIDEV_PROCESS_FLAG_CREATE) &&
918 !(infop->awi_flags & ACPIDEV_WI_DISABLE_CREATE) &&
919 !(infop->awi_flags & ACPIDEV_WI_DEVICE_CREATED) &&
920 (res == ACPIDEV_FILTER_DEFAULT || res == ACPIDEV_FILTER_CREATE)) {
921 int ret;
922
923 /*
924 * Allocate dip and set default properties.
925 * Properties can be overriden in class specific init routines.
926 */
927 ASSERT(infop->awi_dip == NULL);
928 ndi_devi_alloc_sleep(pdip, devname, (pnode_t)DEVI_SID_NODEID,
929 &dip);
930 infop->awi_dip = dip;
931 ret = ndi_prop_update_string(DDI_DEV_T_NONE, dip,
932 OBP_DEVICETYPE, clsp->adc_dev_type);
933 if (ret != NDI_SUCCESS) {
934 ACPIDEV_DEBUG(CE_WARN,
935 "!acpidev: failed to set device property for %s.",
936 infop->awi_name);
937 (void) ddi_remove_child(dip, 0);
938 infop->awi_dip = NULL;
939 kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
940 return (AE_ERROR);
941 }
942
943 /* Build cross reference between dip and ACPI object. */
944 if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0 &&
945 ACPI_FAILURE(acpica_tag_devinfo(dip, hdl))) {
946 cmn_err(CE_WARN,
947 "!acpidev: failed to tag object %s.",
948 infop->awi_name);
949 (void) ddi_remove_child(dip, 0);
950 infop->awi_dip = NULL;
951 kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
952 return (AE_ERROR);
953 }
954
955 /* Call class specific initialization callback. */
956 if (clsp->adc_init != NULL &&
957 ACPI_FAILURE(clsp->adc_init(infop))) {
958 ACPIDEV_DEBUG(CE_WARN,
959 "!acpidev: failed to initialize device %s.",
960 infop->awi_name);
961 if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0) {
962 (void) acpica_untag_devinfo(dip, hdl);
963 }
964 (void) ddi_remove_child(dip, 0);
965 infop->awi_dip = NULL;
966 kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
967 return (AE_ERROR);
968 }
969
970 /* Set device into offline state if requested. */
971 if (flags & ACPIDEV_PROCESS_FLAG_OFFLINE) {
972 mutex_enter(&(DEVI(dip)->devi_lock));
973 DEVI_SET_DEVICE_OFFLINE(dip);
974 mutex_exit(&(DEVI(dip)->devi_lock));
975 }
976
977 /* Mark status */
978 infop->awi_flags |= ACPIDEV_WI_DEVICE_CREATED;
979 datap->aod_iflag |= ACPIDEV_ODF_DEVINFO_CREATED;
980 datap->aod_dip = dip;
981 datap->aod_class = clsp;
982 /* Hold reference count on class driver. */
983 atomic_inc_32(&clsp->adc_refcnt);
984 if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0) {
985 datap->aod_iflag |= ACPIDEV_ODF_DEVINFO_TAGGED;
986 }
987
988 /* Bind device driver. */
989 if ((flags & ACPIDEV_PROCESS_FLAG_NOBIND) != 0) {
990 mutex_enter(&(DEVI(dip)->devi_lock));
991 DEVI(dip)->devi_flags |= DEVI_NO_BIND;
992 mutex_exit(&(DEVI(dip)->devi_lock));
993 } else {
994 (void) ndi_devi_bind_driver(dip, 0);
995 }
996
997 /* Hold reference on branch when hot-adding devices. */
998 if (flags & ACPIDEV_PROCESS_FLAG_HOLDBRANCH) {
999 e_ddi_branch_hold(dip);
1000 }
1001 }
1002
1003 /* Free resources */
1004 kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
1005 rc = AE_OK;
1006
1007 /* Recursively scan child objects if requested. */
1008 switch (res) {
1009 case ACPIDEV_FILTER_DEFAULT:
1010 /* FALLTHROUGH */
1011 case ACPIDEV_FILTER_SCAN:
1012 /* Check if we need to scan child. */
1013 if ((flags & ACPIDEV_PROCESS_FLAG_SCAN) &&
1014 !(infop->awi_flags & ACPIDEV_WI_DISABLE_SCAN) &&
1015 !(infop->awi_flags & ACPIDEV_WI_CHILD_SCANNED)) {
1016 /* probe child object. */
1017 rc = acpidev_probe_child(infop);
1018 if (ACPI_FAILURE(rc)) {
1019 ACPIDEV_DEBUG(CE_WARN,
1020 "!acpidev: failed to probe subtree of %s.",
1021 infop->awi_name);
1022 rc = AE_ERROR;
1023 }
1024 /* Mark object as scanned. */
1025 infop->awi_flags |= ACPIDEV_WI_CHILD_SCANNED;
1026 }
1027 break;
1028
1029 case ACPIDEV_FILTER_CREATE:
1030 /* FALLTHROUGH */
1031 case ACPIDEV_FILTER_CONTINUE:
1032 /* FALLTHROUGH */
1033 case ACPIDEV_FILTER_SKIP:
1034 break;
1035
1036 case ACPIDEV_FILTER_FAILED:
1037 ACPIDEV_DEBUG(CE_WARN,
1038 "!acpidev: failed to probe device for %s.",
1039 infop->awi_name);
1040 rc = AE_ERROR;
1041 break;
1042
1043 default:
1044 cmn_err(CE_WARN,
1045 "!acpidev: unknown filter result code %d.", res);
1046 rc = AE_ERROR;
1047 break;
1048 }
1049
1050 return (rc);
1051 }
1052
1053 acpidev_filter_result_t
1054 acpidev_filter_default(acpidev_walk_info_t *infop, ACPI_HANDLE hdl,
1055 acpidev_filter_rule_t *afrp, char *devname, int len)
1056 {
1057 _NOTE(ARGUNUSED(hdl));
1058
1059 ASSERT(afrp != NULL);
1060 ASSERT(devname == NULL || len >= ACPIDEV_MAX_NAMELEN);
1061 if (infop->awi_level < afrp->adf_minlvl ||
1062 infop->awi_level > afrp->adf_maxlvl) {
1063 return (ACPIDEV_FILTER_CONTINUE);
1064 } else if (afrp->adf_pattern != NULL &&
1065 strncmp(afrp->adf_pattern,
1066 (char *)&infop->awi_info->Name,
1067 sizeof (infop->awi_info->Name))) {
1068 return (ACPIDEV_FILTER_CONTINUE);
1069 }
1070 if (afrp->adf_replace != NULL && devname != NULL) {
1071 (void) strlcpy(devname, afrp->adf_replace, len);
1072 }
1073
1074 return (afrp->adf_retcode);
1075 }
1076
1077 acpidev_filter_result_t
1078 acpidev_filter_device(acpidev_walk_info_t *infop, ACPI_HANDLE hdl,
1079 acpidev_filter_rule_t *afrp, int entries, char *devname, int len)
1080 {
1081 acpidev_filter_result_t res;
1082
1083 /* Evaluate filtering rules. */
1084 for (; entries > 0; entries--, afrp++) {
1085 if (afrp->adf_filter_func != NULL) {
1086 res = afrp->adf_filter_func(infop, hdl, afrp,
1087 devname, len);
1088 } else {
1089 res = acpidev_filter_default(infop, hdl, afrp,
1090 devname, len);
1091 }
1092 if (res == ACPIDEV_FILTER_DEFAULT ||
1093 res == ACPIDEV_FILTER_SCAN) {
1094 infop->awi_class_list = afrp->adf_class_list;
1095 break;
1096 }
1097 }
1098
1099 return (res);
1100 }
1101
1102 dev_info_t *
1103 acpidev_root_node(void)
1104 {
1105 return (acpidev_root_dip);
1106 }
1107
1108 ACPI_STATUS
1109 acpidev_register_class(acpidev_class_list_t **listpp, acpidev_class_t *clsp,
1110 boolean_t tail)
1111 {
1112 ACPI_STATUS rc;
1113 acpidev_class_list_t *item;
1114 acpidev_class_list_t *temp;
1115
1116 ASSERT(clsp != NULL);
1117 ASSERT(listpp != NULL);
1118 if (listpp == NULL || clsp == NULL) {
1119 ACPIDEV_DEBUG(CE_WARN,
1120 "!acpidev: invalid parameter in acpidev_register_class().");
1121 return (AE_BAD_PARAMETER);
1122 } else if (clsp->adc_version != ACPIDEV_CLASS_REV) {
1123 cmn_err(CE_WARN,
1124 "!acpidev: class driver %s version mismatch.",
1125 clsp->adc_class_name);
1126 return (AE_BAD_DATA);
1127 }
1128
1129 rc = AE_OK;
1130 item = kmem_zalloc(sizeof (*item), KM_SLEEP);
1131 item->acl_class = clsp;
1132 rw_enter(&acpidev_class_lock, RW_WRITER);
1133 /* Check for duplicated item. */
1134 for (temp = *listpp; temp != NULL; temp = temp->acl_next) {
1135 if (temp->acl_class == clsp) {
1136 cmn_err(CE_WARN,
1137 "!acpidev: register duplicate class driver %s.",
1138 clsp->adc_class_name);
1139 rc = AE_ALREADY_EXISTS;
1140 break;
1141 }
1142 }
1143 if (ACPI_SUCCESS(rc)) {
1144 if (tail) {
1145 while (*listpp) {
1146 listpp = &(*listpp)->acl_next;
1147 }
1148 }
1149 item->acl_next = *listpp;
1150 *listpp = item;
1151 }
1152 rw_exit(&acpidev_class_lock);
1153 if (ACPI_FAILURE(rc)) {
1154 kmem_free(item, sizeof (*item));
1155 }
1156
1157 return (rc);
1158 }
1159
1160 ACPI_STATUS
1161 acpidev_unregister_class(acpidev_class_list_t **listpp,
1162 acpidev_class_t *clsp)
1163 {
1164 ACPI_STATUS rc = AE_NOT_FOUND;
1165 acpidev_class_list_t *temp;
1166
1167 ASSERT(clsp != NULL);
1168 ASSERT(listpp != NULL);
1169 if (listpp == NULL || clsp == NULL) {
1170 ACPIDEV_DEBUG(CE_WARN, "!acpidev: invalid parameter "
1171 "in acpidev_unregister_class().");
1172 return (AE_BAD_PARAMETER);
1173 }
1174
1175 rw_enter(&acpidev_class_lock, RW_WRITER);
1176 for (temp = NULL; *listpp; listpp = &(*listpp)->acl_next) {
1177 if ((*listpp)->acl_class == clsp) {
1178 temp = *listpp;
1179 *listpp = (*listpp)->acl_next;
1180 break;
1181 }
1182 }
1183 if (temp == NULL) {
1184 ACPIDEV_DEBUG(CE_WARN, "!acpidev: class %p(%s) doesn't exist "
1185 "in acpidev_unregister_class().",
1186 (void *)clsp, clsp->adc_class_name);
1187 rc = AE_NOT_FOUND;
1188 } else if (temp->acl_class->adc_refcnt != 0) {
1189 ACPIDEV_DEBUG(CE_WARN, "!acpidev: class %p(%s) is still in use "
1190 "in acpidev_unregister_class()..",
1191 (void *)clsp, clsp->adc_class_name);
1192 rc = AE_ERROR;
1193 } else {
1194 kmem_free(temp, sizeof (*temp));
1195 rc = AE_OK;
1196 }
1197 rw_exit(&acpidev_class_lock);
1198
1199 return (rc);
1200 }