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kernel - All lwkt thread now start out mpsafe part 1/2
[dragonfly.git] / sys / kern / subr_bus.c
CommitLineData
984263bc
MD		 1/*
2 * Copyright (c) 1997,1998 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $
71fc104f 27 * $DragonFly: src/sys/kern/subr_bus.c,v 1.46 2008/10/03 00:26:21 hasso Exp $
984263bc
MD		 28 */
29
30#include "opt_bus.h"
31
32#include <sys/param.h>
33#include <sys/queue.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
80eff43d 37#include <sys/kobj.h>
984263bc 38#include <sys/bus_private.h>
0010e23a 39#include <sys/sysctl.h>
984263bc 40#include <sys/systm.h>
1f7ab7c9 41#include <sys/bus.h>
984263bc 42#include <sys/rman.h>
71fc104f
HT		 43#include <sys/device.h>
44#include <sys/lock.h>
45#include <sys/conf.h>
71fc104f
HT		 46#include <sys/uio.h>
47#include <sys/filio.h>
4528830b 48#include <sys/event.h>
71fc104f 49#include <sys/signalvar.h>
1f7ab7c9 50
984263bc
MD		 51#include <machine/stdarg.h> /* for device_printf() */
52
dbcd0c9b 53#include <sys/thread2.h>
684a93c4 54#include <sys/mplock2.h>
dbcd0c9b 55
0010e23a
HT		 56SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL);
57
984263bc
MD		 58MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
59
60#ifdef BUS_DEBUG
6ea70f76 61#define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n"))
984263bc
MD		 62#define DEVICENAME(d) ((d)? device_get_name(d): "no device")
63#define DRIVERNAME(d) ((d)? d->name : "no driver")
64#define DEVCLANAME(d) ((d)? d->name : "no devclass")
65
66/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
67 * prevent syslog from deleting initial spaces
68 */
6ea70f76 69#define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0)
984263bc 70
0deb64bd
JS		 71static void print_device_short(device_t dev, int indent);
72static void print_device(device_t dev, int indent);
73void print_device_tree_short(device_t dev, int indent);
74void print_device_tree(device_t dev, int indent);
75static void print_driver_short(driver_t *driver, int indent);
76static void print_driver(driver_t *driver, int indent);
77static void print_driver_list(driver_list_t drivers, int indent);
78static void print_devclass_short(devclass_t dc, int indent);
79static void print_devclass(devclass_t dc, int indent);
80void print_devclass_list_short(void);
81void print_devclass_list(void);
984263bc
MD		 82
83#else
84/* Make the compiler ignore the function calls */
85#define PDEBUG(a) /* nop */
86#define DEVICENAME(d) /* nop */
87#define DRIVERNAME(d) /* nop */
88#define DEVCLANAME(d) /* nop */
89
984263bc
MD		 90#define print_device_short(d,i) /* nop */
91#define print_device(d,i) /* nop */
92#define print_device_tree_short(d,i) /* nop */
93#define print_device_tree(d,i) /* nop */
94#define print_driver_short(d,i) /* nop */
95#define print_driver(d,i) /* nop */
96#define print_driver_list(d,i) /* nop */
97#define print_devclass_short(d,i) /* nop */
98#define print_devclass(d,i) /* nop */
99#define print_devclass_list_short() /* nop */
100#define print_devclass_list() /* nop */
101#endif
102
dbcd0c9b
MD		 103static void device_attach_async(device_t dev);
104static void device_attach_thread(void *arg);
105static int device_doattach(device_t dev);
106
107static int do_async_attach = 0;
108static int numasyncthreads;
109TUNABLE_INT("kern.do_async_attach", &do_async_attach);
984263bc 110
71fc104f
HT		 111/*
112 * /dev/devctl implementation
113 */
114
115/*
116 * This design allows only one reader for /dev/devctl. This is not desirable
117 * in the long run, but will get a lot of hair out of this implementation.
118 * Maybe we should make this device a clonable device.
119 *
120 * Also note: we specifically do not attach a device to the device_t tree
121 * to avoid potential chicken and egg problems. One could argue that all
122 * of this belongs to the root node. One could also further argue that the
123 * sysctl interface that we have not might more properly be an ioctl
124 * interface, but at this stage of the game, I'm not inclined to rock that
125 * boat.
126 *
127 * I'm also not sure that the SIGIO support is done correctly or not, as
128 * I copied it from a driver that had SIGIO support that likely hasn't been
129 * tested since 3.4 or 2.2.8!
130 */
131
132static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS);
133static int devctl_disable = 0;
134TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable);
135SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0,
136 sysctl_devctl_disable, "I", "devctl disable");
137
138#define CDEV_MAJOR 188
139
140static d_open_t devopen;
141static d_close_t devclose;
142static d_read_t devread;
143static d_ioctl_t devioctl;
4528830b 144static d_kqfilter_t devkqfilter;
71fc104f
HT		 145
146static struct dev_ops devctl_ops = {
147 { "devctl", CDEV_MAJOR, 0 },
148 .d_open = devopen,
149 .d_close = devclose,
150 .d_read = devread,
151 .d_ioctl = devioctl,
4528830b 152 .d_kqfilter = devkqfilter
71fc104f
HT		 153};
154
155struct dev_event_info
156{
157 char *dei_data;
158 TAILQ_ENTRY(dev_event_info) dei_link;
159};
160
161TAILQ_HEAD(devq, dev_event_info);
162
163static struct dev_softc
164{
165 int inuse;
166 int nonblock;
167 struct lock lock;
5b22f1a7 168 struct kqinfo kq;
71fc104f
HT		 169 struct devq devq;
170 struct proc *async_proc;
171} devsoftc;
172
173static void
174devinit(void)
175{
71fc104f
HT		 176 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl");
177 lockinit(&devsoftc.lock, "dev mtx", 0, 0);
178 TAILQ_INIT(&devsoftc.devq);
179}
180
181static int
182devopen(struct dev_open_args *ap)
183{
184 if (devsoftc.inuse)
185 return (EBUSY);
186 /* move to init */
187 devsoftc.inuse = 1;
188 devsoftc.nonblock = 0;
189 devsoftc.async_proc = NULL;
190 return (0);
191}
192
193static int
194devclose(struct dev_close_args *ap)
195{
196 devsoftc.inuse = 0;
197 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
198 wakeup(&devsoftc);
199 lockmgr(&devsoftc.lock, LK_RELEASE);
200
201 return (0);
202}
203
204/*
205 * The read channel for this device is used to report changes to
206 * userland in realtime. We are required to free the data as well as
207 * the n1 object because we allocate them separately. Also note that
208 * we return one record at a time. If you try to read this device a
209 * character at a time, you will lose the rest of the data. Listening
210 * programs are expected to cope.
211 */
212static int
213devread(struct dev_read_args *ap)
214{
215 struct uio *uio = ap->a_uio;
216 struct dev_event_info *n1;
217 int rv;
218
219 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
220 while (TAILQ_EMPTY(&devsoftc.devq)) {
221 if (devsoftc.nonblock) {
222 lockmgr(&devsoftc.lock, LK_RELEASE);
223 return (EAGAIN);
224 }
ae8e83e6 225 tsleep_interlock(&devsoftc, PCATCH);
71fc104f 226 lockmgr(&devsoftc.lock, LK_RELEASE);
d9345d3a 227 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0);
71fc104f
HT		 228 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
229 if (rv) {
230 /*
231 * Need to translate ERESTART to EINTR here? -- jake
232 */
233 lockmgr(&devsoftc.lock, LK_RELEASE);
234 return (rv);
235 }
236 }
237 n1 = TAILQ_FIRST(&devsoftc.devq);
238 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
239 lockmgr(&devsoftc.lock, LK_RELEASE);
240 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio);
241 kfree(n1->dei_data, M_BUS);
242 kfree(n1, M_BUS);
243 return (rv);
244}
245
246static int
247devioctl(struct dev_ioctl_args *ap)
248{
249 switch (ap->a_cmd) {
250
251 case FIONBIO:
252 if (*(int*)ap->a_data)
253 devsoftc.nonblock = 1;
254 else
255 devsoftc.nonblock = 0;
256 return (0);
257 case FIOASYNC:
258 if (*(int*)ap->a_data)
259 devsoftc.async_proc = curproc;
260 else
261 devsoftc.async_proc = NULL;
262 return (0);
263
264 /* (un)Support for other fcntl() calls. */
265 case FIOCLEX:
266 case FIONCLEX:
267 case FIONREAD:
268 case FIOSETOWN:
269 case FIOGETOWN:
270 default:
271 break;
272 }
273 return (ENOTTY);
274}
275
4528830b
SG		 276static void dev_filter_detach(struct knote *);
277static int dev_filter_read(struct knote *, long);
278
279static struct filterops dev_filtops =
4c91dbc9 280 { FILTEROP_ISFD, NULL, dev_filter_detach, dev_filter_read };
4528830b
SG		 281
282static int
283devkqfilter(struct dev_kqfilter_args *ap)
284{
285 struct knote *kn = ap->a_kn;
286 struct klist *klist;
287
288 ap->a_result = 0;
289 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
290
291 switch (kn->kn_filter) {
292 case EVFILT_READ:
293 kn->kn_fop = &dev_filtops;
294 break;
295 default:
b287d649 296 ap->a_result = EOPNOTSUPP;
4528830b
SG		 297 lockmgr(&devsoftc.lock, LK_RELEASE);
298 return (0);
299 }
300
5b22f1a7
SG		 301 klist = &devsoftc.kq.ki_note;
302 knote_insert(klist, kn);
4528830b
SG		 303
304 lockmgr(&devsoftc.lock, LK_RELEASE);
305
306 return (0);
307}
308
309static void
310dev_filter_detach(struct knote *kn)
311{
312 struct klist *klist;
313
314 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
5b22f1a7
SG		 315 klist = &devsoftc.kq.ki_note;
316 knote_remove(klist, kn);
4528830b
SG		 317 lockmgr(&devsoftc.lock, LK_RELEASE);
318}
319
320static int
321dev_filter_read(struct knote *kn, long hint)
322{
323 int ready = 0;
324
325 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
326 if (!TAILQ_EMPTY(&devsoftc.devq))
327 ready = 1;
328 lockmgr(&devsoftc.lock, LK_RELEASE);
329
330 return (ready);
331}
332
333
71fc104f
HT		 334/**
335 * @brief Return whether the userland process is running
336 */
337boolean_t
338devctl_process_running(void)
339{
340 return (devsoftc.inuse == 1);
341}
342
343/**
344 * @brief Queue data to be read from the devctl device
345 *
346 * Generic interface to queue data to the devctl device. It is
347 * assumed that @p data is properly formatted. It is further assumed
348 * that @p data is allocated using the M_BUS malloc type.
349 */
350void
351devctl_queue_data(char *data)
352{
353 struct dev_event_info *n1 = NULL;
354 struct proc *p;
355
356 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT);
357 if (n1 == NULL)
358 return;
359 n1->dei_data = data;
360 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
361 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link);
362 wakeup(&devsoftc);
363 lockmgr(&devsoftc.lock, LK_RELEASE);
364 get_mplock(); /* XXX */
5b22f1a7 365 KNOTE(&devsoftc.kq.ki_note, 0);
71fc104f
HT		 366 rel_mplock(); /* XXX */
367 p = devsoftc.async_proc;
368 if (p != NULL)
369 ksignal(p, SIGIO);
370}
371
372/**
373 * @brief Send a 'notification' to userland, using standard ways
374 */
375void
376devctl_notify(const char *system, const char *subsystem, const char *type,
377 const char *data)
378{
379 int len = 0;
380 char *msg;
381
382 if (system == NULL)
383 return; /* BOGUS! Must specify system. */
384 if (subsystem == NULL)
385 return; /* BOGUS! Must specify subsystem. */
386 if (type == NULL)
387 return; /* BOGUS! Must specify type. */
388 len += strlen(" system=") + strlen(system);
389 len += strlen(" subsystem=") + strlen(subsystem);
390 len += strlen(" type=") + strlen(type);
391 /* add in the data message plus newline. */
392 if (data != NULL)
393 len += strlen(data);
394 len += 3; /* '!', '\n', and NUL */
395 msg = kmalloc(len, M_BUS, M_NOWAIT);
396 if (msg == NULL)
397 return; /* Drop it on the floor */
398 if (data != NULL)
399 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n",
400 system, subsystem, type, data);
401 else
402 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n",
403 system, subsystem, type);
404 devctl_queue_data(msg);
405}
406
407/*
408 * Common routine that tries to make sending messages as easy as possible.
409 * We allocate memory for the data, copy strings into that, but do not
410 * free it unless there's an error. The dequeue part of the driver should
411 * free the data. We don't send data when the device is disabled. We do
412 * send data, even when we have no listeners, because we wish to avoid
413 * races relating to startup and restart of listening applications.
414 *
415 * devaddq is designed to string together the type of event, with the
416 * object of that event, plus the plug and play info and location info
417 * for that event. This is likely most useful for devices, but less
418 * useful for other consumers of this interface. Those should use
419 * the devctl_queue_data() interface instead.
420 */
421static void
422devaddq(const char *type, const char *what, device_t dev)
423{
424 char *data = NULL;
425 char *loc = NULL;
426 char *pnp = NULL;
427 const char *parstr;
428
429 if (devctl_disable)
430 return;
431 data = kmalloc(1024, M_BUS, M_NOWAIT);
432 if (data == NULL)
433 goto bad;
434
435 /* get the bus specific location of this device */
436 loc = kmalloc(1024, M_BUS, M_NOWAIT);
437 if (loc == NULL)
438 goto bad;
439 *loc = '\0';
440 bus_child_location_str(dev, loc, 1024);
441
442 /* Get the bus specific pnp info of this device */
443 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
444 if (pnp == NULL)
445 goto bad;
446 *pnp = '\0';
447 bus_child_pnpinfo_str(dev, pnp, 1024);
448
449 /* Get the parent of this device, or / if high enough in the tree. */
450 if (device_get_parent(dev) == NULL)
451 parstr = "."; /* Or '/' ? */
452 else
453 parstr = device_get_nameunit(device_get_parent(dev));
454 /* String it all together. */
455 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp,
456 parstr);
457 kfree(loc, M_BUS);
458 kfree(pnp, M_BUS);
459 devctl_queue_data(data);
460 return;
461bad:
462 kfree(pnp, M_BUS);
463 kfree(loc, M_BUS);
464 kfree(data, M_BUS);
465 return;
466}
467
468/*
469 * A device was added to the tree. We are called just after it successfully
470 * attaches (that is, probe and attach success for this device). No call
471 * is made if a device is merely parented into the tree. See devnomatch
472 * if probe fails. If attach fails, no notification is sent (but maybe
473 * we should have a different message for this).
474 */
475static void
476devadded(device_t dev)
477{
478 char *pnp = NULL;
479 char *tmp = NULL;
480
481 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
482 if (pnp == NULL)
483 goto fail;
484 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
485 if (tmp == NULL)
486 goto fail;
487 *pnp = '\0';
488 bus_child_pnpinfo_str(dev, pnp, 1024);
489 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
490 devaddq("+", tmp, dev);
491fail:
492 if (pnp != NULL)
493 kfree(pnp, M_BUS);
494 if (tmp != NULL)
495 kfree(tmp, M_BUS);
496 return;
497}
498
499/*
500 * A device was removed from the tree. We are called just before this
501 * happens.
502 */
503static void
504devremoved(device_t dev)
505{
506 char *pnp = NULL;
507 char *tmp = NULL;
508
509 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
510 if (pnp == NULL)
511 goto fail;
512 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
513 if (tmp == NULL)
514 goto fail;
515 *pnp = '\0';
516 bus_child_pnpinfo_str(dev, pnp, 1024);
517 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
518 devaddq("-", tmp, dev);
519fail:
520 if (pnp != NULL)
521 kfree(pnp, M_BUS);
522 if (tmp != NULL)
523 kfree(tmp, M_BUS);
524 return;
525}
526
527/*
528 * Called when there's no match for this device. This is only called
529 * the first time that no match happens, so we don't keep getitng this
530 * message. Should that prove to be undesirable, we can change it.
531 * This is called when all drivers that can attach to a given bus
532 * decline to accept this device. Other errrors may not be detected.
533 */
534static void
535devnomatch(device_t dev)
536{
537 devaddq("?", "", dev);
538}
539
540static int
541sysctl_devctl_disable(SYSCTL_HANDLER_ARGS)
542{
543 struct dev_event_info *n1;
544 int dis, error;
545
546 dis = devctl_disable;
547 error = sysctl_handle_int(oidp, &dis, 0, req);
548 if (error || !req->newptr)
549 return (error);
550 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
551 devctl_disable = dis;
552 if (dis) {
553 while (!TAILQ_EMPTY(&devsoftc.devq)) {
554 n1 = TAILQ_FIRST(&devsoftc.devq);
555 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
556 kfree(n1->dei_data, M_BUS);
557 kfree(n1, M_BUS);
558 }
559 }
560 lockmgr(&devsoftc.lock, LK_RELEASE);
561 return (0);
562}
563
564/* End of /dev/devctl code */
565
0010e23a
HT		 566TAILQ_HEAD(,device) bus_data_devices;
567static int bus_data_generation = 1;
568
80eff43d 569kobj_method_t null_methods[] = {
0deb64bd 570 { 0, 0 }
984263bc
MD		 571};
572
80eff43d 573DEFINE_CLASS(null, null_methods, 0);
984263bc
MD		 574
575/*
576 * Devclass implementation
577 */
578
579static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
580
581static devclass_t
91a0c258
JS		 582devclass_find_internal(const char *classname, const char *parentname,
583 int create)
984263bc 584{
0deb64bd 585 devclass_t dc;
984263bc 586
0deb64bd
JS		 587 PDEBUG(("looking for %s", classname));
588 if (classname == NULL)
589 return(NULL);
590
591 TAILQ_FOREACH(dc, &devclasses, link)
592 if (!strcmp(dc->name, classname))
91a0c258 593 break;
0deb64bd 594
91a0c258
JS		 595 if (create && !dc) {
596 PDEBUG(("creating %s", classname));
77652cad 597 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1,
3b284c6a 598 M_BUS, M_INTWAIT | M_ZERO);
0deb64bd 599 if (!dc)
91a0c258
JS		 600 return(NULL);
601 dc->parent = NULL;
0deb64bd
JS		 602 dc->name = (char*) (dc + 1);
603 strcpy(dc->name, classname);
604 dc->devices = NULL;
605 dc->maxunit = 0;
606 TAILQ_INIT(&dc->drivers);
607 TAILQ_INSERT_TAIL(&devclasses, dc, link);
0010e23a
HT		 608
609 bus_data_generation_update();
610
0deb64bd 611 }
91a0c258
JS		 612 if (parentname && dc && !dc->parent)
613 dc->parent = devclass_find_internal(parentname, NULL, FALSE);
984263bc 614
0deb64bd 615 return(dc);
984263bc
MD		 616}
617
618devclass_t
619devclass_create(const char *classname)
620{
91a0c258 621 return(devclass_find_internal(classname, NULL, TRUE));
984263bc
MD		 622}
623
624devclass_t
625devclass_find(const char *classname)
626{
91a0c258 627 return(devclass_find_internal(classname, NULL, FALSE));
984263bc
MD		 628}
629
2581072f
MD		 630device_t
631devclass_find_unit(const char *classname, int unit)
632{
633 devclass_t dc;
634
635 if ((dc = devclass_find(classname)) != NULL)
636 return(devclass_get_device(dc, unit));
637 return (NULL);
638}
639
984263bc
MD		 640int
641devclass_add_driver(devclass_t dc, driver_t *driver)
642{
0deb64bd 643 driverlink_t dl;
39b5d600 644 device_t dev;
0deb64bd 645 int i;
984263bc 646
0deb64bd 647 PDEBUG(("%s", DRIVERNAME(driver)));
984263bc 648
efda3bd0 649 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
0deb64bd
JS		 650 if (!dl)
651 return(ENOMEM);
984263bc 652
0deb64bd
JS		 653 /*
654 * Compile the driver's methods. Also increase the reference count
655 * so that the class doesn't get freed when the last instance
656 * goes. This means we can safely use static methods and avoids a
657 * double-free in devclass_delete_driver.
658 */
b4f5425e 659 kobj_class_instantiate(driver);
984263bc 660
0deb64bd
JS		 661 /*
662 * Make sure the devclass which the driver is implementing exists.
663 */
91a0c258 664 devclass_find_internal(driver->name, NULL, TRUE);
984263bc 665
0deb64bd
JS		 666 dl->driver = driver;
667 TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
984263bc 668
0deb64bd 669 /*
39b5d600
MD		 670 * Call BUS_DRIVER_ADDED for any existing busses in this class,
671 * but only if the bus has already been attached (otherwise we
672 * might probe too early).
673 *
674 * This is what will cause a newly loaded module to be associated
675 * with hardware. bus_generic_driver_added() is typically what ends
676 * up being called.
0deb64bd 677 */
39b5d600
MD		 678 for (i = 0; i < dc->maxunit; i++) {
679 if ((dev = dc->devices[i]) != NULL) {
308ea088 680 if (dev->state >= DS_ATTACHED)
39b5d600
MD		 681 BUS_DRIVER_ADDED(dev, driver);
682 }
683 }
984263bc 684
0010e23a 685 bus_data_generation_update();
0deb64bd 686 return(0);
984263bc
MD		 687}
688
689int
690devclass_delete_driver(devclass_t busclass, driver_t *driver)
691{
0deb64bd
JS		 692 devclass_t dc = devclass_find(driver->name);
693 driverlink_t dl;
694 device_t dev;
695 int i;
696 int error;
984263bc 697
0deb64bd 698 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
984263bc 699
0deb64bd
JS		 700 if (!dc)
701 return(0);
984263bc 702
0deb64bd
JS		 703 /*
704 * Find the link structure in the bus' list of drivers.
705 */
706 TAILQ_FOREACH(dl, &busclass->drivers, link)
707 if (dl->driver == driver)
708 break;
709
710 if (!dl) {
711 PDEBUG(("%s not found in %s list", driver->name, busclass->name));
712 return(ENOENT);
984263bc 713 }
984263bc 714
0deb64bd
JS		 715 /*
716 * Disassociate from any devices. We iterate through all the
717 * devices in the devclass of the driver and detach any which are
718 * using the driver and which have a parent in the devclass which
719 * we are deleting from.
720 *
721 * Note that since a driver can be in multiple devclasses, we
722 * should not detach devices which are not children of devices in
723 * the affected devclass.
724 */
725 for (i = 0; i < dc->maxunit; i++)
726 if (dc->devices[i]) {
727 dev = dc->devices[i];
728 if (dev->driver == driver && dev->parent &&
729 dev->parent->devclass == busclass) {
730 if ((error = device_detach(dev)) != 0)
731 return(error);
732 device_set_driver(dev, NULL);
733 }
734 }
735
736 TAILQ_REMOVE(&busclass->drivers, dl, link);
efda3bd0 737 kfree(dl, M_BUS);
984263bc 738
b4f5425e 739 kobj_class_uninstantiate(driver);
984263bc 740
0010e23a 741 bus_data_generation_update();
0deb64bd 742 return(0);
984263bc
MD		 743}
744
745static driverlink_t
746devclass_find_driver_internal(devclass_t dc, const char *classname)
747{
0deb64bd 748 driverlink_t dl;
984263bc 749
0deb64bd 750 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
984263bc 751
0deb64bd
JS		 752 TAILQ_FOREACH(dl, &dc->drivers, link)
753 if (!strcmp(dl->driver->name, classname))
754 return(dl);
984263bc 755
0deb64bd
JS		 756 PDEBUG(("not found"));
757 return(NULL);
984263bc
MD		 758}
759
91a0c258 760kobj_class_t
984263bc
MD		 761devclass_find_driver(devclass_t dc, const char *classname)
762{
0deb64bd 763 driverlink_t dl;
984263bc 764
0deb64bd
JS		 765 dl = devclass_find_driver_internal(dc, classname);
766 if (dl)
767 return(dl->driver);
768 else
769 return(NULL);
984263bc
MD		 770}
771
772const char *
773devclass_get_name(devclass_t dc)
774{
0deb64bd 775 return(dc->name);
984263bc
MD		 776}
777
778device_t
779devclass_get_device(devclass_t dc, int unit)
780{
0deb64bd
JS		 781 if (dc == NULL || unit < 0 || unit >= dc->maxunit)
782 return(NULL);
783 return(dc->devices[unit]);
984263bc
MD		 784}
785
786void *
787devclass_get_softc(devclass_t dc, int unit)
788{
0deb64bd 789 device_t dev;
984263bc 790
0deb64bd
JS		 791 dev = devclass_get_device(dc, unit);
792 if (!dev)
793 return(NULL);
984263bc 794
0deb64bd 795 return(device_get_softc(dev));
984263bc
MD		 796}
797
798int
799devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
800{
0deb64bd
JS		 801 int i;
802 int count;
803 device_t *list;
984263bc 804
0deb64bd
JS		 805 count = 0;
806 for (i = 0; i < dc->maxunit; i++)
807 if (dc->devices[i])
808 count++;
809
efda3bd0 810 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
0deb64bd
JS		 811 if (list == NULL)
812 return(ENOMEM);
984263bc 813
0deb64bd
JS		 814 count = 0;
815 for (i = 0; i < dc->maxunit; i++)
816 if (dc->devices[i]) {
817 list[count] = dc->devices[i];
818 count++;
819 }
984263bc 820
0deb64bd
JS		 821 *devlistp = list;
822 *devcountp = count;
823
824 return(0);
984263bc
MD		 825}
826
5ebadb2c
HT		 827/**
828 * @brief Get a list of drivers in the devclass
829 *
830 * An array containing a list of pointers to all the drivers in the
831 * given devclass is allocated and returned in @p *listp. The number
832 * of drivers in the array is returned in @p *countp. The caller should
833 * free the array using @c free(p, M_TEMP).
834 *
835 * @param dc the devclass to examine
836 * @param listp gives location for array pointer return value
837 * @param countp gives location for number of array elements
838 * return value
839 *
840 * @retval 0 success
841 * @retval ENOMEM the array allocation failed
842 */
843int
844devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp)
845{
846 driverlink_t dl;
847 driver_t **list;
848 int count;
849
850 count = 0;
851 TAILQ_FOREACH(dl, &dc->drivers, link)
852 count++;
853 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT);
854 if (list == NULL)
855 return (ENOMEM);
856
857 count = 0;
858 TAILQ_FOREACH(dl, &dc->drivers, link) {
859 list[count] = dl->driver;
860 count++;
861 }
862 *listp = list;
863 *countp = count;
864
865 return (0);
866}
867
7d58d14b
HT		 868/**
869 * @brief Get the number of devices in a devclass
870 *
871 * @param dc the devclass to examine
872 */
873int
874devclass_get_count(devclass_t dc)
875{
876 int count, i;
877
878 count = 0;
879 for (i = 0; i < dc->maxunit; i++)
880 if (dc->devices[i])
881 count++;
882 return (count);
883}
884
984263bc
MD		 885int
886devclass_get_maxunit(devclass_t dc)
887{
0deb64bd 888 return(dc->maxunit);
984263bc
MD		 889}
890
91a0c258
JS		 891void
892devclass_set_parent(devclass_t dc, devclass_t pdc)
893{
894 dc->parent = pdc;
895}
896
897devclass_t
898devclass_get_parent(devclass_t dc)
899{
900 return(dc->parent);
901}
902
984263bc
MD		 903static int
904devclass_alloc_unit(devclass_t dc, int *unitp)
905{
0deb64bd 906 int unit = *unitp;
984263bc 907
0deb64bd 908 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
984263bc 909
0deb64bd
JS		 910 /* If we have been given a wired unit number, check for existing device */
911 if (unit != -1) {
912 if (unit >= 0 && unit < dc->maxunit &&
913 dc->devices[unit] != NULL) {
914 if (bootverbose)
6ea70f76 915 kprintf("%s-: %s%d exists, using next available unit number\n",
0deb64bd
JS		 916 dc->name, dc->name, unit);
917 /* find the next available slot */
918 while (++unit < dc->maxunit && dc->devices[unit] != NULL)
919 ;
920 }
921 } else {
922 /* Unwired device, find the next available slot for it */
923 unit = 0;
924 while (unit < dc->maxunit && dc->devices[unit] != NULL)
925 unit++;
984263bc 926 }
0deb64bd
JS		 927
928 /*
929 * We've selected a unit beyond the length of the table, so let's
930 * extend the table to make room for all units up to and including
931 * this one.
932 */
933 if (unit >= dc->maxunit) {
934 device_t *newlist;
935 int newsize;
936
937 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
efda3bd0 938 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS,
3b284c6a 939 M_INTWAIT | M_ZERO);
0deb64bd
JS		 940 if (newlist == NULL)
941 return(ENOMEM);
942 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
943 if (dc->devices)
efda3bd0 944 kfree(dc->devices, M_BUS);
0deb64bd
JS		 945 dc->devices = newlist;
946 dc->maxunit = newsize;
947 }
948 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
949
950 *unitp = unit;
951 return(0);
984263bc
MD		 952}
953
954static int
955devclass_add_device(devclass_t dc, device_t dev)
956{
0deb64bd 957 int buflen, error;
984263bc 958
0deb64bd 959 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
984263bc 960
0deb64bd 961 buflen = strlen(dc->name) + 5;
efda3bd0 962 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
0deb64bd
JS		 963 if (!dev->nameunit)
964 return(ENOMEM);
984263bc 965
0deb64bd 966 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
efda3bd0 967 kfree(dev->nameunit, M_BUS);
0deb64bd
JS		 968 dev->nameunit = NULL;
969 return(error);
970 }
971 dc->devices[dev->unit] = dev;
972 dev->devclass = dc;
f8c7a42d 973 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
984263bc 974
0deb64bd 975 return(0);
984263bc
MD		 976}
977
978static int
979devclass_delete_device(devclass_t dc, device_t dev)
980{
0deb64bd
JS		 981 if (!dc || !dev)
982 return(0);
984263bc 983
0deb64bd 984 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
984263bc 985
0deb64bd
JS		 986 if (dev->devclass != dc || dc->devices[dev->unit] != dev)
987 panic("devclass_delete_device: inconsistent device class");
988 dc->devices[dev->unit] = NULL;
989 if (dev->flags & DF_WILDCARD)
990 dev->unit = -1;
991 dev->devclass = NULL;
efda3bd0 992 kfree(dev->nameunit, M_BUS);
0deb64bd 993 dev->nameunit = NULL;
984263bc 994
0deb64bd 995 return(0);
984263bc
MD		 996}
997
998static device_t
999make_device(device_t parent, const char *name, int unit)
1000{
0deb64bd
JS		 1001 device_t dev;
1002 devclass_t dc;
984263bc 1003
0deb64bd 1004 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
984263bc 1005
0deb64bd 1006 if (name != NULL) {
91a0c258 1007 dc = devclass_find_internal(name, NULL, TRUE);
0deb64bd 1008 if (!dc) {
6ea70f76 1009 kprintf("make_device: can't find device class %s\n", name);
0deb64bd
JS		 1010 return(NULL);
1011 }
1012 } else
1013 dc = NULL;
984263bc 1014
efda3bd0 1015 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO);
0deb64bd
JS		 1016 if (!dev)
1017 return(0);
984263bc 1018
0deb64bd
JS		 1019 dev->parent = parent;
1020 TAILQ_INIT(&dev->children);
1021 kobj_init((kobj_t) dev, &null_class);
1022 dev->driver = NULL;
1023 dev->devclass = NULL;
1024 dev->unit = unit;
1025 dev->nameunit = NULL;
1026 dev->desc = NULL;
1027 dev->busy = 0;
1028 dev->devflags = 0;
1029 dev->flags = DF_ENABLED;
1030 dev->order = 0;
1031 if (unit == -1)
1032 dev->flags |= DF_WILDCARD;
1033 if (name) {
1034 dev->flags |= DF_FIXEDCLASS;
1035 if (devclass_add_device(dc, dev) != 0) {
1036 kobj_delete((kobj_t)dev, M_BUS);
1037 return(NULL);
1038 }
1039 }
1040 dev->ivars = NULL;
1041 dev->softc = NULL;
984263bc 1042
0deb64bd 1043 dev->state = DS_NOTPRESENT;
984263bc 1044
0010e23a
HT		 1045 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
1046 bus_data_generation_update();
1047
0deb64bd 1048 return(dev);
984263bc
MD		 1049}
1050
1051static int
1052device_print_child(device_t dev, device_t child)
1053{
0deb64bd 1054 int retval = 0;
984263bc 1055
0deb64bd
JS		 1056 if (device_is_alive(child))
1057 retval += BUS_PRINT_CHILD(dev, child);
1058 else
1059 retval += device_printf(child, " not found\n");
984263bc 1060
0deb64bd 1061 return(retval);
984263bc
MD		 1062}
1063
1064device_t
1065device_add_child(device_t dev, const char *name, int unit)
1066{
0deb64bd 1067 return device_add_child_ordered(dev, 0, name, unit);
984263bc
MD		 1068}
1069
1070device_t
1071device_add_child_ordered(device_t dev, int order, const char *name, int unit)
1072{
0deb64bd
JS		 1073 device_t child;
1074 device_t place;
984263bc 1075
0deb64bd
JS		 1076 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
1077 order, unit));
984263bc 1078
0deb64bd
JS		 1079 child = make_device(dev, name, unit);
1080 if (child == NULL)
1081 return child;
1082 child->order = order;
984263bc 1083
0deb64bd
JS		 1084 TAILQ_FOREACH(place, &dev->children, link)
1085 if (place->order > order)
1086 break;
984263bc 1087
0deb64bd
JS		 1088 if (place) {
1089 /*
1090 * The device 'place' is the first device whose order is
1091 * greater than the new child.
1092 */
1093 TAILQ_INSERT_BEFORE(place, child, link);
1094 } else {
1095 /*
1096 * The new child's order is greater or equal to the order of
1097 * any existing device. Add the child to the tail of the list.
1098 */
1099 TAILQ_INSERT_TAIL(&dev->children, child, link);
1100 }
984263bc 1101
0010e23a 1102 bus_data_generation_update();
0deb64bd 1103 return(child);
984263bc
MD		 1104}
1105
1106int
1107device_delete_child(device_t dev, device_t child)
1108{
0deb64bd
JS		 1109 int error;
1110 device_t grandchild;
984263bc 1111
0deb64bd 1112 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
984263bc 1113
0deb64bd
JS		 1114 /* remove children first */
1115 while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
1116 error = device_delete_child(child, grandchild);
1117 if (error)
1118 return(error);
1119 }
984263bc 1120
0deb64bd
JS		 1121 if ((error = device_detach(child)) != 0)
1122 return(error);
1123 if (child->devclass)
1124 devclass_delete_device(child->devclass, child);
1125 TAILQ_REMOVE(&dev->children, child, link);
0010e23a 1126 TAILQ_REMOVE(&bus_data_devices, child, devlink);
0deb64bd
JS		 1127 device_set_desc(child, NULL);
1128 kobj_delete((kobj_t)child, M_BUS);
984263bc 1129
0010e23a 1130 bus_data_generation_update();
0deb64bd 1131 return(0);
984263bc
MD		 1132}
1133
a2a274f4
HT		 1134/**
1135 * @brief Find a device given a unit number
1136 *
1137 * This is similar to devclass_get_devices() but only searches for
1138 * devices which have @p dev as a parent.
1139 *
1140 * @param dev the parent device to search
1141 * @param unit the unit number to search for. If the unit is -1,
1142 * return the first child of @p dev which has name
1143 * @p classname (that is, the one with the lowest unit.)
1144 *
1145 * @returns the device with the given unit number or @c
1146 * NULL if there is no such device
984263bc
MD		 1147 */
1148device_t
1149device_find_child(device_t dev, const char *classname, int unit)
1150{
0deb64bd
JS		 1151 devclass_t dc;
1152 device_t child;
984263bc 1153
0deb64bd
JS		 1154 dc = devclass_find(classname);
1155 if (!dc)
1156 return(NULL);
984263bc 1157
a2a274f4
HT		 1158 if (unit != -1) {
1159 child = devclass_get_device(dc, unit);
1160 if (child && child->parent == dev)
1161 return (child);
1162 } else {
1163 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) {
1164 child = devclass_get_device(dc, unit);
1165 if (child && child->parent == dev)
1166 return (child);
1167 }
1168 }
0deb64bd 1169 return(NULL);
984263bc
MD		 1170}
1171
1172static driverlink_t
1173first_matching_driver(devclass_t dc, device_t dev)
1174{
0deb64bd
JS		 1175 if (dev->devclass)
1176 return(devclass_find_driver_internal(dc, dev->devclass->name));
1177 else
1178 return(TAILQ_FIRST(&dc->drivers));
984263bc
MD		 1179}
1180
1181static driverlink_t
1182next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
1183{
0deb64bd
JS		 1184 if (dev->devclass) {
1185 driverlink_t dl;
1186 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
1187 if (!strcmp(dev->devclass->name, dl->driver->name))
1188 return(dl);
1189 return(NULL);
1190 } else
1191 return(TAILQ_NEXT(last, link));
984263bc
MD		 1192}
1193
1194static int
1195device_probe_child(device_t dev, device_t child)
1196{
0deb64bd
JS		 1197 devclass_t dc;
1198 driverlink_t best = 0;
1199 driverlink_t dl;
1200 int result, pri = 0;
1201 int hasclass = (child->devclass != 0);
1202
1203 dc = dev->devclass;
1204 if (!dc)
1205 panic("device_probe_child: parent device has no devclass");
984263bc 1206
0deb64bd
JS		 1207 if (child->state == DS_ALIVE)
1208 return(0);
984263bc 1209
91a0c258
JS		 1210 for (; dc; dc = dc->parent) {
1211 for (dl = first_matching_driver(dc, child); dl;
1212 dl = next_matching_driver(dc, child, dl)) {
1213 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1214 device_set_driver(child, dl->driver);
1215 if (!hasclass)
1216 device_set_devclass(child, dl->driver->name);
1217 result = DEVICE_PROBE(child);
1218 if (!hasclass)
1219 device_set_devclass(child, 0);
984263bc 1220
91a0c258
JS		 1221 /*
1222 * If the driver returns SUCCESS, there can be
1223 * no higher match for this device.
1224 */
1225 if (result == 0) {
1226 best = dl;
1227 pri = 0;
1228 break;
1229 }
984263bc 1230
91a0c258
JS		 1231 /*
1232 * The driver returned an error so it
1233 * certainly doesn't match.
1234 */
1235 if (result > 0) {
1236 device_set_driver(child, 0);
1237 continue;
1238 }
984263bc 1239
91a0c258
JS		 1240 /*
1241 * A priority lower than SUCCESS, remember the
1242 * best matching driver. Initialise the value
1243 * of pri for the first match.
1244 */
1245 if (best == 0 || result > pri) {
1246 best = dl;
1247 pri = result;
1248 continue;
1249 }
1250 }
0deb64bd 1251 /*
91a0c258
JS		 1252 * If we have unambiguous match in this devclass,
1253 * don't look in the parent.
1254 */
1255 if (best && pri == 0)
1256 break;
984263bc
MD		 1257 }
1258
1259 /*
0deb64bd 1260 * If we found a driver, change state and initialise the devclass.
984263bc 1261 */
0deb64bd
JS		 1262 if (best) {
1263 if (!child->devclass)
1264 device_set_devclass(child, best->driver->name);
1265 device_set_driver(child, best->driver);
1266 if (pri < 0) {
1267 /*
1268 * A bit bogus. Call the probe method again to make
1269 * sure that we have the right description.
1270 */
1271 DEVICE_PROBE(child);
1272 }
0010e23a
HT		 1273
1274 bus_data_generation_update();
0deb64bd
JS		 1275 child->state = DS_ALIVE;
1276 return(0);
984263bc 1277 }
984263bc 1278
0deb64bd 1279 return(ENXIO);
984263bc
MD		 1280}
1281
1282device_t
1283device_get_parent(device_t dev)
1284{
0deb64bd 1285 return dev->parent;
984263bc
MD		 1286}
1287
1288int
1289device_get_children(device_t dev, device_t **devlistp, int *devcountp)
1290{
0deb64bd
JS		 1291 int count;
1292 device_t child;
1293 device_t *list;
984263bc 1294
0deb64bd
JS		 1295 count = 0;
1296 TAILQ_FOREACH(child, &dev->children, link)
1297 count++;
984263bc 1298
efda3bd0 1299 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
0deb64bd
JS		 1300 if (!list)
1301 return(ENOMEM);
984263bc 1302
0deb64bd
JS		 1303 count = 0;
1304 TAILQ_FOREACH(child, &dev->children, link) {
1305 list[count] = child;
1306 count++;
1307 }
984263bc 1308
0deb64bd
JS		 1309 *devlistp = list;
1310 *devcountp = count;
984263bc 1311
0deb64bd 1312 return(0);
984263bc
MD		 1313}
1314
1315driver_t *
1316device_get_driver(device_t dev)
1317{
0deb64bd 1318 return(dev->driver);
984263bc
MD		 1319}
1320
1321devclass_t
1322device_get_devclass(device_t dev)
1323{
0deb64bd 1324 return(dev->devclass);
984263bc
MD		 1325}
1326
1327const char *
1328device_get_name(device_t dev)
1329{
0deb64bd
JS		 1330 if (dev->devclass)
1331 return devclass_get_name(dev->devclass);
1332 return(NULL);
984263bc
MD		 1333}
1334
1335const char *
1336device_get_nameunit(device_t dev)
1337{
0deb64bd 1338 return(dev->nameunit);
984263bc
MD		 1339}
1340
1341int
1342device_get_unit(device_t dev)
1343{
0deb64bd 1344 return(dev->unit);
984263bc
MD		 1345}
1346
1347const char *
1348device_get_desc(device_t dev)
1349{
0deb64bd 1350 return(dev->desc);
984263bc
MD		 1351}
1352
0deb64bd 1353uint32_t
984263bc
MD		 1354device_get_flags(device_t dev)
1355{
0deb64bd 1356 return(dev->devflags);
984263bc
MD		 1357}
1358
1359int
1360device_print_prettyname(device_t dev)
1361{
0deb64bd 1362 const char *name = device_get_name(dev);
984263bc 1363
0deb64bd 1364 if (name == 0)
6ea70f76 1365 return kprintf("unknown: ");
0deb64bd 1366 else
6ea70f76 1367 return kprintf("%s%d: ", name, device_get_unit(dev));
984263bc
MD		 1368}
1369
1370int
1371device_printf(device_t dev, const char * fmt, ...)
1372{
0deb64bd
JS		 1373 __va_list ap;
1374 int retval;
984263bc 1375
0deb64bd
JS		 1376 retval = device_print_prettyname(dev);
1377 __va_start(ap, fmt);
379210cb 1378 retval += kvprintf(fmt, ap);
0deb64bd
JS		 1379 __va_end(ap);
1380 return retval;
984263bc
MD		 1381}
1382
1383static void
1384device_set_desc_internal(device_t dev, const char* desc, int copy)
1385{
0deb64bd 1386 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
efda3bd0 1387 kfree(dev->desc, M_BUS);
0deb64bd
JS		 1388 dev->flags &= ~DF_DESCMALLOCED;
1389 dev->desc = NULL;
984263bc 1390 }
0deb64bd
JS		 1391
1392 if (copy && desc) {
efda3bd0 1393 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
0deb64bd
JS		 1394 if (dev->desc) {
1395 strcpy(dev->desc, desc);
1396 dev->flags |= DF_DESCMALLOCED;
1397 }
0010e23a 1398 } else {
0deb64bd
JS		 1399 /* Avoid a -Wcast-qual warning */
1400 dev->desc = (char *)(uintptr_t) desc;
0deb64bd 1401 }
0010e23a
HT		 1402
1403 bus_data_generation_update();
984263bc
MD		 1404}
1405
1406void
1407device_set_desc(device_t dev, const char* desc)
1408{
0deb64bd 1409 device_set_desc_internal(dev, desc, FALSE);
984263bc
MD		 1410}
1411
1412void
1413device_set_desc_copy(device_t dev, const char* desc)
1414{
0deb64bd 1415 device_set_desc_internal(dev, desc, TRUE);
984263bc
MD		 1416}
1417
1418void
0deb64bd 1419device_set_flags(device_t dev, uint32_t flags)
984263bc 1420{
0deb64bd 1421 dev->devflags = flags;
984263bc
MD		 1422}
1423
1424void *
1425device_get_softc(device_t dev)
1426{
0deb64bd 1427 return dev->softc;
984263bc
MD		 1428}
1429
1430void
1431device_set_softc(device_t dev, void *softc)
1432{
0deb64bd 1433 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
efda3bd0 1434 kfree(dev->softc, M_BUS);
0deb64bd
JS		 1435 dev->softc = softc;
1436 if (dev->softc)
1437 dev->flags |= DF_EXTERNALSOFTC;
1438 else
1439 dev->flags &= ~DF_EXTERNALSOFTC;
984263bc
MD		 1440}
1441
dbcd0c9b
MD		 1442void
1443device_set_async_attach(device_t dev, int enable)
1444{
1445 if (enable)
1446 dev->flags |= DF_ASYNCPROBE;
1447 else
1448 dev->flags &= ~DF_ASYNCPROBE;
1449}
1450
984263bc
MD		 1451void *
1452device_get_ivars(device_t dev)
1453{
0deb64bd 1454 return dev->ivars;
984263bc
MD		 1455}
1456
1457void
1458device_set_ivars(device_t dev, void * ivars)
1459{
0deb64bd
JS		 1460 if (!dev)
1461 return;
984263bc 1462
0deb64bd 1463 dev->ivars = ivars;
984263bc
MD		 1464}
1465
1466device_state_t
1467device_get_state(device_t dev)
1468{
0deb64bd 1469 return(dev->state);
984263bc
MD		 1470}
1471
1472void
1473device_enable(device_t dev)
1474{
0deb64bd 1475 dev->flags |= DF_ENABLED;
984263bc
MD		 1476}
1477
1478void
1479device_disable(device_t dev)
1480{
0deb64bd 1481 dev->flags &= ~DF_ENABLED;
984263bc
MD		 1482}
1483
8a8d5d85
MD		 1484/*
1485 * YYY cannot block
1486 */
984263bc
MD		 1487void
1488device_busy(device_t dev)
1489{
0deb64bd
JS		 1490 if (dev->state < DS_ATTACHED)
1491 panic("device_busy: called for unattached device");
1492 if (dev->busy == 0 && dev->parent)
1493 device_busy(dev->parent);
1494 dev->busy++;
1495 dev->state = DS_BUSY;
984263bc
MD		 1496}
1497
8a8d5d85
MD		 1498/*
1499 * YYY cannot block
1500 */
984263bc
MD		 1501void
1502device_unbusy(device_t dev)
1503{
0deb64bd
JS		 1504 if (dev->state != DS_BUSY)
1505 panic("device_unbusy: called for non-busy device");
1506 dev->busy--;
1507 if (dev->busy == 0) {
1508 if (dev->parent)
1509 device_unbusy(dev->parent);
1510 dev->state = DS_ATTACHED;
1511 }
984263bc
MD		 1512}
1513
1514void
1515device_quiet(device_t dev)
1516{
0deb64bd 1517 dev->flags |= DF_QUIET;
984263bc
MD		 1518}
1519
1520void
1521device_verbose(device_t dev)
1522{
0deb64bd 1523 dev->flags &= ~DF_QUIET;
984263bc
MD		 1524}
1525
1526int
1527device_is_quiet(device_t dev)
1528{
0deb64bd 1529 return((dev->flags & DF_QUIET) != 0);
984263bc
MD		 1530}
1531
1532int
1533device_is_enabled(device_t dev)
1534{
0deb64bd 1535 return((dev->flags & DF_ENABLED) != 0);
984263bc
MD		 1536}
1537
1538int
1539device_is_alive(device_t dev)
1540{
0deb64bd 1541 return(dev->state >= DS_ALIVE);
984263bc
MD		 1542}
1543
1544int
2140e77f
JS		 1545device_is_attached(device_t dev)
1546{
0deb64bd 1547 return(dev->state >= DS_ATTACHED);
2140e77f
JS		 1548}
1549
1550int
984263bc
MD		 1551device_set_devclass(device_t dev, const char *classname)
1552{
0deb64bd 1553 devclass_t dc;
0010e23a 1554 int error;
984263bc 1555
0deb64bd
JS		 1556 if (!classname) {
1557 if (dev->devclass)
1558 devclass_delete_device(dev->devclass, dev);
1559 return(0);
1560 }
984263bc 1561
0deb64bd 1562 if (dev->devclass) {
6ea70f76 1563 kprintf("device_set_devclass: device class already set\n");
0deb64bd
JS		 1564 return(EINVAL);
1565 }
984263bc 1566
91a0c258 1567 dc = devclass_find_internal(classname, NULL, TRUE);
0deb64bd
JS		 1568 if (!dc)
1569 return(ENOMEM);
984263bc 1570
0010e23a
HT		 1571 error = devclass_add_device(dc, dev);
1572
1573 bus_data_generation_update();
1574 return(error);
984263bc
MD		 1575}
1576
1577int
1578device_set_driver(device_t dev, driver_t *driver)
1579{
0deb64bd
JS		 1580 if (dev->state >= DS_ATTACHED)
1581 return(EBUSY);
984263bc 1582
0deb64bd
JS		 1583 if (dev->driver == driver)
1584 return(0);
984263bc 1585
0deb64bd 1586 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
efda3bd0 1587 kfree(dev->softc, M_BUS);
0deb64bd 1588 dev->softc = NULL;
20d25173 1589 }
0deb64bd
JS		 1590 kobj_delete((kobj_t) dev, 0);
1591 dev->driver = driver;
1592 if (driver) {
1593 kobj_init((kobj_t) dev, (kobj_class_t) driver);
1594 if (!(dev->flags & DF_EXTERNALSOFTC)) {
efda3bd0 1595 dev->softc = kmalloc(driver->size, M_BUS,
3b284c6a 1596 M_INTWAIT | M_ZERO);
0deb64bd
JS		 1597 if (!dev->softc) {
1598 kobj_delete((kobj_t)dev, 0);
1599 kobj_init((kobj_t) dev, &null_class);
1600 dev->driver = NULL;
1601 return(ENOMEM);
1602 }
1603 }
0010e23a 1604 } else {
0deb64bd 1605 kobj_init((kobj_t) dev, &null_class);
0010e23a
HT		 1606 }
1607
1608 bus_data_generation_update();
0deb64bd 1609 return(0);
984263bc
MD		 1610}
1611
1612int
1613device_probe_and_attach(device_t dev)
1614{
0deb64bd
JS		 1615 device_t bus = dev->parent;
1616 int error = 0;
984263bc 1617
0deb64bd
JS		 1618 if (dev->state >= DS_ALIVE)
1619 return(0);
1620
1621 if ((dev->flags & DF_ENABLED) == 0) {
1622 if (bootverbose) {
1623 device_print_prettyname(dev);
6ea70f76 1624 kprintf("not probed (disabled)\n");
0deb64bd
JS		 1625 }
1626 return(0);
1627 }
984263bc 1628
984263bc 1629 error = device_probe_child(bus, dev);
0deb64bd
JS		 1630 if (error) {
1631 if (!(dev->flags & DF_DONENOMATCH)) {
1632 BUS_PROBE_NOMATCH(bus, dev);
71fc104f 1633 devnomatch(dev);
0deb64bd
JS		 1634 dev->flags |= DF_DONENOMATCH;
1635 }
1636 return(error);
1637 }
1b20a98f
MD		 1638
1639 /*
1640 * Output the exact device chain prior to the attach in case the
1641 * system locks up during attach, and generate the full info after
1642 * the attach so correct irq and other information is displayed.
1643 */
1644 if (bootverbose && !device_is_quiet(dev)) {
1645 device_t tmp;
1646
6ea70f76 1647 kprintf("%s", device_get_nameunit(dev));
64f6c535 1648 for (tmp = dev->parent; tmp; tmp = tmp->parent)
6ea70f76
SW		 1649 kprintf(".%s", device_get_nameunit(tmp));
1650 kprintf("\n");
1b20a98f 1651 }
0deb64bd 1652 if (!device_is_quiet(dev))
984263bc 1653 device_print_child(bus, dev);
dbcd0c9b
MD		 1654 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
1655 kprintf("%s: probing asynchronously\n",
1656 device_get_nameunit(dev));
1657 dev->state = DS_INPROGRESS;
1658 device_attach_async(dev);
1659 error = 0;
1660 } else {
1661 error = device_doattach(dev);
1662 }
1663 return(error);
1664}
1665
1666/*
1667 * Device is known to be alive, do the attach asynchronously.
c9e9fb21 1668 * However, serialize the attaches with the mp lock.
dbcd0c9b
MD		 1669 */
1670static void
1671device_attach_async(device_t dev)
1672{
1673 thread_t td;
1674
1675 atomic_add_int(&numasyncthreads, 1);
1676 lwkt_create(device_attach_thread, dev, &td, NULL,
c9e9fb21
MD		 1677 TDF_MPSAFE, 0,
1678 (dev->desc ? dev->desc : "devattach"));
dbcd0c9b
MD		 1679}
1680
1681static void
1682device_attach_thread(void *arg)
1683{
1684 device_t dev = arg;
1685
c9e9fb21 1686 get_mplock(); /* XXX replace with devattach_token later */
dbcd0c9b
MD		 1687 (void)device_doattach(dev);
1688 atomic_subtract_int(&numasyncthreads, 1);
1689 wakeup(&numasyncthreads);
c9e9fb21 1690 rel_mplock(); /* XXX replace with devattach_token later */
dbcd0c9b
MD		 1691}
1692
1693/*
1694 * Device is known to be alive, do the attach (synchronous or asynchronous)
1695 */
1696static int
1697device_doattach(device_t dev)
1698{
1699 device_t bus = dev->parent;
1700 int hasclass = (dev->devclass != 0);
1701 int error;
1702
b99fcb0c 1703 error = DEVICE_ATTACH(dev);
1b20a98f 1704 if (error == 0) {
984263bc 1705 dev->state = DS_ATTACHED;
b99fcb0c
MD		 1706 if (bootverbose && !device_is_quiet(dev))
1707 device_print_child(bus, dev);
71fc104f 1708 devadded(dev);
1b20a98f 1709 } else {
6ea70f76 1710 kprintf("device_probe_and_attach: %s%d attach returned %d\n",
984263bc
MD		 1711 dev->driver->name, dev->unit, error);
1712 /* Unset the class that was set in device_probe_child */
1713 if (!hasclass)
0deb64bd 1714 device_set_devclass(dev, 0);
984263bc
MD		 1715 device_set_driver(dev, NULL);
1716 dev->state = DS_NOTPRESENT;
984263bc 1717 }
0deb64bd 1718 return(error);
984263bc
MD		 1719}
1720
1721int
1722device_detach(device_t dev)
1723{
0deb64bd 1724 int error;
984263bc 1725
0deb64bd
JS		 1726 PDEBUG(("%s", DEVICENAME(dev)));
1727 if (dev->state == DS_BUSY)
1728 return(EBUSY);
1729 if (dev->state != DS_ATTACHED)
1730 return(0);
984263bc 1731
0deb64bd
JS		 1732 if ((error = DEVICE_DETACH(dev)) != 0)
1733 return(error);
71fc104f 1734 devremoved(dev);
0deb64bd
JS		 1735 device_printf(dev, "detached\n");
1736 if (dev->parent)
1737 BUS_CHILD_DETACHED(dev->parent, dev);
984263bc 1738
0deb64bd
JS		 1739 if (!(dev->flags & DF_FIXEDCLASS))
1740 devclass_delete_device(dev->devclass, dev);
984263bc 1741
0deb64bd
JS		 1742 dev->state = DS_NOTPRESENT;
1743 device_set_driver(dev, NULL);
984263bc 1744
0deb64bd 1745 return(0);
984263bc
MD		 1746}
1747
1748int
1749device_shutdown(device_t dev)
1750{
0deb64bd
JS		 1751 if (dev->state < DS_ATTACHED)
1752 return 0;
bb088466 1753 PDEBUG(("%s", DEVICENAME(dev)));
0deb64bd 1754 return DEVICE_SHUTDOWN(dev);
984263bc
MD		 1755}
1756
1757int
1758device_set_unit(device_t dev, int unit)
1759{
0deb64bd
JS		 1760 devclass_t dc;
1761 int err;
984263bc 1762
0deb64bd
JS		 1763 dc = device_get_devclass(dev);
1764 if (unit < dc->maxunit && dc->devices[unit])
1765 return(EBUSY);
1766 err = devclass_delete_device(dc, dev);
1767 if (err)
1768 return(err);
1769 dev->unit = unit;
1770 err = devclass_add_device(dc, dev);
0010e23a
HT		 1771 if (err)
1772 return(err);
984263bc 1773
0010e23a
HT		 1774 bus_data_generation_update();
1775 return(0);
984263bc
MD		 1776}
1777
984263bc
MD		 1778/*======================================*/
1779/*
1780 * Access functions for device resources.
1781 */
1782
1783/* Supplied by config(8) in ioconf.c */
1784extern struct config_device config_devtab[];
1785extern int devtab_count;
1786
1787/* Runtime version */
1788struct config_device *devtab = config_devtab;
1789
1790static int
1791resource_new_name(const char *name, int unit)
1792{
1793 struct config_device *new;
1794
efda3bd0 1795 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP,
3b284c6a 1796 M_INTWAIT | M_ZERO);
984263bc 1797 if (new == NULL)
0deb64bd 1798 return(-1);
984263bc
MD		 1799 if (devtab && devtab_count > 0)
1800 bcopy(devtab, new, devtab_count * sizeof(*new));
efda3bd0 1801 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
984263bc 1802 if (new[devtab_count].name == NULL) {
efda3bd0 1803 kfree(new, M_TEMP);
0deb64bd 1804 return(-1);
984263bc
MD		 1805 }
1806 strcpy(new[devtab_count].name, name);
1807 new[devtab_count].unit = unit;
1808 new[devtab_count].resource_count = 0;
1809 new[devtab_count].resources = NULL;
b1954fd1 1810 if (devtab && devtab != config_devtab)
efda3bd0 1811 kfree(devtab, M_TEMP);
984263bc
MD		 1812 devtab = new;
1813 return devtab_count++;
1814}
1815
1816static int
1817resource_new_resname(int j, const char *resname, resource_type type)
1818{
1819 struct config_resource *new;
1820 int i;
1821
1822 i = devtab[j].resource_count;
efda3bd0 1823 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
984263bc 1824 if (new == NULL)
0deb64bd 1825 return(-1);
984263bc
MD		 1826 if (devtab[j].resources && i > 0)
1827 bcopy(devtab[j].resources, new, i * sizeof(*new));
efda3bd0 1828 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
984263bc 1829 if (new[i].name == NULL) {
efda3bd0 1830 kfree(new, M_TEMP);
0deb64bd 1831 return(-1);
984263bc
MD		 1832 }
1833 strcpy(new[i].name, resname);
1834 new[i].type = type;
1835 if (devtab[j].resources)
efda3bd0 1836 kfree(devtab[j].resources, M_TEMP);
984263bc
MD		 1837 devtab[j].resources = new;
1838 devtab[j].resource_count = i + 1;
0deb64bd 1839 return(i);
984263bc
MD		 1840}
1841
1842static int
1843resource_match_string(int i, const char *resname, const char *value)
1844{
1845 int j;
1846 struct config_resource *res;
1847
1848 for (j = 0, res = devtab[i].resources;
1849 j < devtab[i].resource_count; j++, res++)
1850 if (!strcmp(res->name, resname)
1851 && res->type == RES_STRING
1852 && !strcmp(res->u.stringval, value))
0deb64bd
JS		 1853 return(j);
1854 return(-1);
984263bc
MD		 1855}
1856
1857static int
1858resource_find(const char *name, int unit, const char *resname,
1859 struct config_resource **result)
1860{
1861 int i, j;
1862 struct config_resource *res;
1863
1864 /*
1865 * First check specific instances, then generic.
1866 */
1867 for (i = 0; i < devtab_count; i++) {
1868 if (devtab[i].unit < 0)
1869 continue;
1870 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1871 res = devtab[i].resources;
1872 for (j = 0; j < devtab[i].resource_count; j++, res++)
1873 if (!strcmp(res->name, resname)) {
1874 *result = res;
0deb64bd 1875 return(0);
984263bc
MD		 1876 }
1877 }
1878 }
1879 for (i = 0; i < devtab_count; i++) {
1880 if (devtab[i].unit >= 0)
1881 continue;
1882 /* XXX should this `&& devtab[i].unit == unit' be here? */
1883 /* XXX if so, then the generic match does nothing */
1884 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1885 res = devtab[i].resources;
1886 for (j = 0; j < devtab[i].resource_count; j++, res++)
1887 if (!strcmp(res->name, resname)) {
1888 *result = res;
0deb64bd 1889 return(0);
984263bc
MD		 1890 }
1891 }
1892 }
0deb64bd 1893 return(ENOENT);
984263bc
MD		 1894}
1895
1896int
1897resource_int_value(const char *name, int unit, const char *resname, int *result)
1898{
1899 int error;
1900 struct config_resource *res;
1901
1902 if ((error = resource_find(name, unit, resname, &res)) != 0)
0deb64bd 1903 return(error);
984263bc 1904 if (res->type != RES_INT)
0deb64bd 1905 return(EFTYPE);
984263bc 1906 *result = res->u.intval;
0deb64bd 1907 return(0);
984263bc
MD		 1908}
1909
1910int
1911resource_long_value(const char *name, int unit, const char *resname,
1912 long *result)
1913{
1914 int error;
1915 struct config_resource *res;
1916
1917 if ((error = resource_find(name, unit, resname, &res)) != 0)
0deb64bd 1918 return(error);
984263bc 1919 if (res->type != RES_LONG)
0deb64bd 1920 return(EFTYPE);
984263bc 1921 *result = res->u.longval;
0deb64bd 1922 return(0);
984263bc
MD		 1923}
1924
1925int
1926resource_string_value(const char *name, int unit, const char *resname,
1927 char **result)
1928{
1929 int error;
1930 struct config_resource *res;
1931
1932 if ((error = resource_find(name, unit, resname, &res)) != 0)
0deb64bd 1933 return(error);
984263bc 1934 if (res->type != RES_STRING)
0deb64bd 1935 return(EFTYPE);
984263bc 1936 *result = res->u.stringval;
0deb64bd 1937 return(0);
984263bc
MD		 1938}
1939
1940int
1941resource_query_string(int i, const char *resname, const char *value)
1942{
1943 if (i < 0)
1944 i = 0;
1945 else
1946 i = i + 1;
1947 for (; i < devtab_count; i++)
1948 if (resource_match_string(i, resname, value) >= 0)
0deb64bd
JS		 1949 return(i);
1950 return(-1);
984263bc
MD		 1951}
1952
1953int
1954resource_locate(int i, const char *resname)
1955{
1956 if (i < 0)
1957 i = 0;
1958 else
1959 i = i + 1;
1960 for (; i < devtab_count; i++)
1961 if (!strcmp(devtab[i].name, resname))
0deb64bd
JS		 1962 return(i);
1963 return(-1);
984263bc
MD		 1964}
1965
1966int
1967resource_count(void)
1968{
0deb64bd 1969 return(devtab_count);
984263bc
MD		 1970}
1971
1972char *
1973resource_query_name(int i)
1974{
0deb64bd 1975 return(devtab[i].name);
984263bc
MD		 1976}
1977
1978int
1979resource_query_unit(int i)
1980{
0deb64bd 1981 return(devtab[i].unit);
984263bc
MD		 1982}
1983
1984static int
1985resource_create(const char *name, int unit, const char *resname,
1986 resource_type type, struct config_resource **result)
1987{
1988 int i, j;
1989 struct config_resource *res = NULL;
1990
0deb64bd 1991 for (i = 0; i < devtab_count; i++)
984263bc
MD		 1992 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1993 res = devtab[i].resources;
1994 break;
1995 }
984263bc
MD		 1996 if (res == NULL) {
1997 i = resource_new_name(name, unit);
1998 if (i < 0)
0deb64bd 1999 return(ENOMEM);
984263bc
MD		 2000 res = devtab[i].resources;
2001 }
0deb64bd 2002 for (j = 0; j < devtab[i].resource_count; j++, res++)
984263bc
MD		 2003 if (!strcmp(res->name, resname)) {
2004 *result = res;
0deb64bd 2005 return(0);
984263bc 2006 }
984263bc
MD		 2007 j = resource_new_resname(i, resname, type);
2008 if (j < 0)
0deb64bd 2009 return(ENOMEM);
984263bc
MD		 2010 res = &devtab[i].resources[j];
2011 *result = res;
0deb64bd 2012 return(0);
984263bc
MD		 2013}
2014
2015int
2016resource_set_int(const char *name, int unit, const char *resname, int value)
2017{
2018 int error;
2019 struct config_resource *res;
2020
2021 error = resource_create(name, unit, resname, RES_INT, &res);
2022 if (error)
0deb64bd 2023 return(error);
984263bc 2024 if (res->type != RES_INT)
0deb64bd 2025 return(EFTYPE);
984263bc 2026 res->u.intval = value;
0deb64bd 2027 return(0);
984263bc
MD		 2028}
2029
2030int
2031resource_set_long(const char *name, int unit, const char *resname, long value)
2032{
2033 int error;
2034 struct config_resource *res;
2035
2036 error = resource_create(name, unit, resname, RES_LONG, &res);
2037 if (error)
0deb64bd 2038 return(error);
984263bc 2039 if (res->type != RES_LONG)
0deb64bd 2040 return(EFTYPE);
984263bc 2041 res->u.longval = value;
0deb64bd 2042 return(0);
984263bc
MD		 2043}
2044
2045int
2046resource_set_string(const char *name, int unit, const char *resname,
2047 const char *value)
2048{
2049 int error;
2050 struct config_resource *res;
2051
2052 error = resource_create(name, unit, resname, RES_STRING, &res);
2053 if (error)
0deb64bd 2054 return(error);
984263bc 2055 if (res->type != RES_STRING)
0deb64bd 2056 return(EFTYPE);
984263bc 2057 if (res->u.stringval)
efda3bd0
MD		 2058 kfree(res->u.stringval, M_TEMP);
2059 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
984263bc 2060 if (res->u.stringval == NULL)
0deb64bd 2061 return(ENOMEM);
984263bc 2062 strcpy(res->u.stringval, value);
0deb64bd 2063 return(0);
984263bc
MD		 2064}
2065
984263bc
MD		 2066static void
2067resource_cfgload(void *dummy __unused)
2068{
2069 struct config_resource *res, *cfgres;
2070 int i, j;
2071 int error;
2072 char *name, *resname;
2073 int unit;
2074 resource_type type;
2075 char *stringval;
2076 int config_devtab_count;
2077
2078 config_devtab_count = devtab_count;
2079 devtab = NULL;
2080 devtab_count = 0;
2081
2082 for (i = 0; i < config_devtab_count; i++) {
2083 name = config_devtab[i].name;
2084 unit = config_devtab[i].unit;
2085
2086 for (j = 0; j < config_devtab[i].resource_count; j++) {
2087 cfgres = config_devtab[i].resources;
2088 resname = cfgres[j].name;
2089 type = cfgres[j].type;
2090 error = resource_create(name, unit, resname, type,
2091 &res);
2092 if (error) {
6ea70f76 2093 kprintf("create resource %s%d: error %d\n",
984263bc
MD		 2094 name, unit, error);
2095 continue;
2096 }
2097 if (res->type != type) {
6ea70f76 2098 kprintf("type mismatch %s%d: %d != %d\n",
984263bc
MD		 2099 name, unit, res->type, type);
2100 continue;
2101 }
2102 switch (type) {
2103 case RES_INT:
2104 res->u.intval = cfgres[j].u.intval;
2105 break;
2106 case RES_LONG:
2107 res->u.longval = cfgres[j].u.longval;
2108 break;
2109 case RES_STRING:
2110 if (res->u.stringval)
efda3bd0 2111 kfree(res->u.stringval, M_TEMP);
984263bc 2112 stringval = cfgres[j].u.stringval;
77652cad 2113 res->u.stringval = kmalloc(strlen(stringval) + 1,
3b284c6a 2114 M_TEMP, M_INTWAIT);
984263bc
MD		 2115 if (res->u.stringval == NULL)
2116 break;
2117 strcpy(res->u.stringval, stringval);
2118 break;
2119 default:
fc92d4aa 2120 panic("unknown resource type %d", type);
984263bc
MD		 2121 }
2122 }
2123 }
2124}
ba39e2e0 2125SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0)
984263bc
MD		 2126
2127
2128/*======================================*/
2129/*
2130 * Some useful method implementations to make life easier for bus drivers.
2131 */
2132
2133void
2134resource_list_init(struct resource_list *rl)
2135{
2136 SLIST_INIT(rl);
2137}
2138
2139void
2140resource_list_free(struct resource_list *rl)
2141{
0deb64bd 2142 struct resource_list_entry *rle;
984263bc 2143
0deb64bd
JS		 2144 while ((rle = SLIST_FIRST(rl)) != NULL) {
2145 if (rle->res)
2146 panic("resource_list_free: resource entry is busy");
2147 SLIST_REMOVE_HEAD(rl, link);
efda3bd0 2148 kfree(rle, M_BUS);
0deb64bd 2149 }
984263bc
MD		 2150}
2151
2152void
2153resource_list_add(struct resource_list *rl,
2154 int type, int rid,
2155 u_long start, u_long end, u_long count)
2156{
0deb64bd 2157 struct resource_list_entry *rle;
984263bc 2158
0deb64bd
JS		 2159 rle = resource_list_find(rl, type, rid);
2160 if (rle == NULL) {
efda3bd0 2161 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS,
3b284c6a 2162 M_INTWAIT);
0deb64bd
JS		 2163 if (!rle)
2164 panic("resource_list_add: can't record entry");
2165 SLIST_INSERT_HEAD(rl, rle, link);
2166 rle->type = type;
2167 rle->rid = rid;
2168 rle->res = NULL;
2169 }
984263bc 2170
0deb64bd
JS		 2171 if (rle->res)
2172 panic("resource_list_add: resource entry is busy");
984263bc 2173
0deb64bd
JS		 2174 rle->start = start;
2175 rle->end = end;
2176 rle->count = count;
984263bc
MD		 2177}
2178
2179struct resource_list_entry*
2180resource_list_find(struct resource_list *rl,
2181 int type, int rid)
2182{
0deb64bd 2183 struct resource_list_entry *rle;
984263bc 2184
0deb64bd
JS		 2185 SLIST_FOREACH(rle, rl, link)
2186 if (rle->type == type && rle->rid == rid)
2187 return(rle);
2188 return(NULL);
984263bc
MD		 2189}
2190
2191void
2192resource_list_delete(struct resource_list *rl,
2193 int type, int rid)
2194{
0deb64bd 2195 struct resource_list_entry *rle = resource_list_find(rl, type, rid);
984263bc 2196
0deb64bd 2197 if (rle) {
0010e23a
HT		 2198 if (rle->res != NULL)
2199 panic("resource_list_delete: resource has not been released");
0deb64bd 2200 SLIST_REMOVE(rl, rle, resource_list_entry, link);
efda3bd0 2201 kfree(rle, M_BUS);
0deb64bd 2202 }
984263bc
MD		 2203}
2204
2205struct resource *
2206resource_list_alloc(struct resource_list *rl,
2207 device_t bus, device_t child,
2208 int type, int *rid,
2209 u_long start, u_long end,
2210 u_long count, u_int flags)
2211{
0deb64bd
JS		 2212 struct resource_list_entry *rle = 0;
2213 int passthrough = (device_get_parent(child) != bus);
2214 int isdefault = (start == 0UL && end == ~0UL);
984263bc 2215
0deb64bd
JS		 2216 if (passthrough) {
2217 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2218 type, rid,
2219 start, end, count, flags));
2220 }
984263bc 2221
0deb64bd 2222 rle = resource_list_find(rl, type, *rid);
984263bc 2223
0deb64bd
JS		 2224 if (!rle)
2225 return(0); /* no resource of that type/rid */
0010e23a 2226
0deb64bd
JS		 2227 if (rle->res)
2228 panic("resource_list_alloc: resource entry is busy");
984263bc 2229
0deb64bd
JS		 2230 if (isdefault) {
2231 start = rle->start;
2232 count = max(count, rle->count);
2233 end = max(rle->end, start + count - 1);
2234 }
984263bc 2235
0deb64bd
JS		 2236 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2237 type, rid, start, end, count, flags);
984263bc 2238
0deb64bd
JS		 2239 /*
2240 * Record the new range.
2241 */
2242 if (rle->res) {
2243 rle->start = rman_get_start(rle->res);
2244 rle->end = rman_get_end(rle->res);
2245 rle->count = count;
2246 }
984263bc 2247
0deb64bd 2248 return(rle->res);
984263bc
MD		 2249}
2250
2251int
2252resource_list_release(struct resource_list *rl,
2253 device_t bus, device_t child,
2254 int type, int rid, struct resource *res)
2255{
0deb64bd
JS		 2256 struct resource_list_entry *rle = 0;
2257 int passthrough = (device_get_parent(child) != bus);
2258 int error;
984263bc 2259
0deb64bd
JS		 2260 if (passthrough) {
2261 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2262 type, rid, res));
2263 }
984263bc 2264
0deb64bd 2265 rle = resource_list_find(rl, type, rid);
984263bc 2266
0deb64bd
JS		 2267 if (!rle)
2268 panic("resource_list_release: can't find resource");
2269 if (!rle->res)
2270 panic("resource_list_release: resource entry is not busy");
984263bc 2271
0deb64bd
JS		 2272 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2273 type, rid, res);
2274 if (error)
2275 return(error);
984263bc 2276
0deb64bd
JS		 2277 rle->res = NULL;
2278 return(0);
984263bc
MD		 2279}
2280
2281int
2282resource_list_print_type(struct resource_list *rl, const char *name, int type,
0deb64bd 2283 const char *format)
984263bc
MD		 2284{
2285 struct resource_list_entry *rle;
2286 int printed, retval;
2287
2288 printed = 0;
2289 retval = 0;
2290 /* Yes, this is kinda cheating */
2291 SLIST_FOREACH(rle, rl, link) {
2292 if (rle->type == type) {
2293 if (printed == 0)
6ea70f76 2294 retval += kprintf(" %s ", name);
984263bc 2295 else
6ea70f76 2296 retval += kprintf(",");
984263bc 2297 printed++;
6ea70f76 2298 retval += kprintf(format, rle->start);
984263bc 2299 if (rle->count > 1) {
6ea70f76
SW		 2300 retval += kprintf("-");
2301 retval += kprintf(format, rle->start +
984263bc
MD		 2302 rle->count - 1);
2303 }
2304 }
2305 }
0deb64bd 2306 return(retval);
984263bc
MD		 2307}
2308
2309/*
39b5d600
MD		 2310 * Generic driver/device identify functions. These will install a device
2311 * rendezvous point under the parent using the same name as the driver
2312 * name, which will at a later time be probed and attached.
2313 *
2314 * These functions are used when the parent does not 'scan' its bus for
2315 * matching devices, or for the particular devices using these functions,
2316 * or when the device is a pseudo or synthesized device (such as can be
2317 * found under firewire and ppbus).
2318 */
2319int
2320bus_generic_identify(driver_t *driver, device_t parent)
2321{
2322 if (parent->state == DS_ATTACHED)
2323 return (0);
2581072f 2324 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1);
39b5d600
MD		 2325 return (0);
2326}
2327
2328int
2329bus_generic_identify_sameunit(driver_t *driver, device_t parent)
2330{
2331 if (parent->state == DS_ATTACHED)
2332 return (0);
2581072f 2333 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent));
39b5d600
MD		 2334 return (0);
2335}
2336
2337/*
984263bc
MD		 2338 * Call DEVICE_IDENTIFY for each driver.
2339 */
2340int
2341bus_generic_probe(device_t dev)
2342{
0deb64bd
JS		 2343 devclass_t dc = dev->devclass;
2344 driverlink_t dl;
984263bc 2345
39b5d600 2346 TAILQ_FOREACH(dl, &dc->drivers, link) {
0deb64bd 2347 DEVICE_IDENTIFY(dl->driver, dev);
39b5d600 2348 }
984263bc 2349
0deb64bd 2350 return(0);
984263bc
MD		 2351}
2352
39b5d600
MD		 2353/*
2354 * This is an aweful hack due to the isa bus and autoconf code not
2355 * probing the ISA devices until after everything else has configured.
2356 * The ISA bus did a dummy attach long ago so we have to set it back
2357 * to an earlier state so the probe thinks its the initial probe and
2358 * not a bus rescan.
2359 *
2360 * XXX remove by properly defering the ISA bus scan.
2361 */
2362int
2363bus_generic_probe_hack(device_t dev)
2364{
2365 if (dev->state == DS_ATTACHED) {
2366 dev->state = DS_ALIVE;
2367 bus_generic_probe(dev);
2368 dev->state = DS_ATTACHED;
2369 }
2370 return (0);
2371}
2372
984263bc
MD		 2373int
2374bus_generic_attach(device_t dev)
2375{
0deb64bd 2376 device_t child;
984263bc 2377
39b5d600 2378 TAILQ_FOREACH(child, &dev->children, link) {
0deb64bd 2379 device_probe_and_attach(child);
39b5d600 2380 }
984263bc 2381
0deb64bd 2382 return(0);
984263bc
MD		 2383}
2384
2385int
2386bus_generic_detach(device_t dev)
2387{
0deb64bd
JS		 2388 device_t child;
2389 int error;
984263bc 2390
0deb64bd
JS		 2391 if (dev->state != DS_ATTACHED)
2392 return(EBUSY);
984263bc 2393
0deb64bd
JS		 2394 TAILQ_FOREACH(child, &dev->children, link)
2395 if ((error = device_detach(child)) != 0)
2396 return(error);
984263bc 2397
0deb64bd 2398 return 0;
984263bc
MD		 2399}
2400
2401int
2402bus_generic_shutdown(device_t dev)
2403{
0deb64bd 2404 device_t child;
984263bc 2405
0deb64bd
JS		 2406 TAILQ_FOREACH(child, &dev->children, link)
2407 device_shutdown(child);
984263bc 2408
0deb64bd 2409 return(0);
984263bc
MD		 2410}
2411
2412int
2413bus_generic_suspend(device_t dev)
2414{
0deb64bd
JS		 2415 int error;
2416 device_t child, child2;
984263bc 2417
8d0e5ff2 2418 TAILQ_FOREACH(child, &dev->children, link) {
984263bc
MD		 2419 error = DEVICE_SUSPEND(child);
2420 if (error) {
2421 for (child2 = TAILQ_FIRST(&dev->children);
2422 child2 && child2 != child;
2423 child2 = TAILQ_NEXT(child2, link))
2424 DEVICE_RESUME(child2);
0deb64bd 2425 return(error);
984263bc
MD		 2426 }
2427 }
0deb64bd 2428 return(0);
984263bc
MD		 2429}
2430
2431int
2432bus_generic_resume(device_t dev)
2433{
0deb64bd 2434 device_t child;
984263bc 2435
0deb64bd 2436 TAILQ_FOREACH(child, &dev->children, link)
984263bc
MD		 2437 DEVICE_RESUME(child);
2438 /* if resume fails, there's nothing we can usefully do... */
0deb64bd
JS		 2439
2440 return(0);
984263bc
MD		 2441}
2442
2443int
0deb64bd 2444bus_print_child_header(device_t dev, device_t child)
984263bc 2445{
0deb64bd 2446 int retval = 0;
984263bc 2447
0deb64bd
JS		 2448 if (device_get_desc(child))
2449 retval += device_printf(child, "<%s>", device_get_desc(child));
2450 else
6ea70f76 2451 retval += kprintf("%s", device_get_nameunit(child));
b99fcb0c
MD		 2452 if (bootverbose) {
2453 if (child->state != DS_ATTACHED)
6ea70f76 2454 kprintf(" [tentative]");
b99fcb0c 2455 else
6ea70f76 2456 kprintf(" [attached!]");
b99fcb0c 2457 }
0deb64bd 2458 return(retval);
984263bc
MD		 2459}
2460
2461int
0deb64bd 2462bus_print_child_footer(device_t dev, device_t child)
984263bc 2463{
6ea70f76 2464 return(kprintf(" on %s\n", device_get_nameunit(dev)));
984263bc
MD		 2465}
2466
2581072f
MD		 2467device_t
2468bus_generic_add_child(device_t dev, device_t child, int order,
2469 const char *name, int unit)
2470{
2471 if (dev->parent)
2472 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit);
2473 else
2474 dev = device_add_child_ordered(child, order, name, unit);
2475 return(dev);
2476
2477}
2478
984263bc
MD		 2479int
2480bus_generic_print_child(device_t dev, device_t child)
2481{
0deb64bd 2482 int retval = 0;
984263bc
MD		 2483
2484 retval += bus_print_child_header(dev, child);
2485 retval += bus_print_child_footer(dev, child);
2486
0deb64bd 2487 return(retval);
984263bc
MD		 2488}
2489
2490int
2491bus_generic_read_ivar(device_t dev, device_t child, int index,
2492 uintptr_t * result)
2493{
2581072f
MD		 2494 int error;
2495
2496 if (dev->parent)
2497 error = BUS_READ_IVAR(dev->parent, child, index, result);
2498 else
2499 error = ENOENT;
2500 return (error);
984263bc
MD		 2501}
2502
2503int
2504bus_generic_write_ivar(device_t dev, device_t child, int index,
2505 uintptr_t value)
2506{
2581072f
MD		 2507 int error;
2508
2509 if (dev->parent)
2510 error = BUS_WRITE_IVAR(dev->parent, child, index, value);
2511 else
2512 error = ENOENT;
2513 return (error);
984263bc
MD		 2514}
2515
04ddb925
MD		 2516/*
2517 * Resource list are used for iterations, do not recurse.
2518 */
e126caf1
MD		 2519struct resource_list *
2520bus_generic_get_resource_list(device_t dev, device_t child)
2521{
04ddb925 2522 return (NULL);
e126caf1
MD		 2523}
2524
984263bc
MD		 2525void
2526bus_generic_driver_added(device_t dev, driver_t *driver)
2527{
0deb64bd 2528 device_t child;
984263bc 2529
0deb64bd 2530 DEVICE_IDENTIFY(driver, dev);
39b5d600 2531 TAILQ_FOREACH(child, &dev->children, link) {
0deb64bd
JS		 2532 if (child->state == DS_NOTPRESENT)
2533 device_probe_and_attach(child);
39b5d600 2534 }
984263bc
MD		 2535}
2536
2537int
2538bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
2539 int flags, driver_intr_t *intr, void *arg,
e9cb6d99 2540 void **cookiep, lwkt_serialize_t serializer)
984263bc
MD		 2541{
2542 /* Propagate up the bus hierarchy until someone handles it. */
2543 if (dev->parent)
0deb64bd 2544 return(BUS_SETUP_INTR(dev->parent, child, irq, flags,
e9cb6d99 2545 intr, arg, cookiep, serializer));
984263bc 2546 else
0deb64bd 2547 return(EINVAL);
984263bc
MD		 2548}
2549
2550int
2551bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
2552 void *cookie)
2553{
2554 /* Propagate up the bus hierarchy until someone handles it. */
2555 if (dev->parent)
0deb64bd 2556 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
984263bc 2557 else
0deb64bd 2558 return(EINVAL);
984263bc
MD		 2559}
2560
e9cb6d99 2561int
67a2436e
MD		 2562bus_generic_disable_intr(device_t dev, device_t child, void *cookie)
2563{
2564 if (dev->parent)
e9cb6d99
MD		 2565 return(BUS_DISABLE_INTR(dev->parent, child, cookie));
2566 else
2567 return(0);
67a2436e
MD		 2568}
2569
2570void
2571bus_generic_enable_intr(device_t dev, device_t child, void *cookie)
2572{
2573 if (dev->parent)
2574 BUS_ENABLE_INTR(dev->parent, child, cookie);
2575}
2576
2581072f 2577int
05065648 2578bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
2581072f
MD		 2579 enum intr_polarity pol)
2580{
2581 /* Propagate up the bus hierarchy until someone handles it. */
2582 if (dev->parent)
05065648 2583 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol));
2581072f
MD		 2584 else
2585 return(EINVAL);
2586}
2587
984263bc
MD		 2588struct resource *
2589bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
2590 u_long start, u_long end, u_long count, u_int flags)
2591{
2592 /* Propagate up the bus hierarchy until someone handles it. */
2593 if (dev->parent)
0deb64bd 2594 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
984263bc
MD		 2595 start, end, count, flags));
2596 else
0deb64bd 2597 return(NULL);
984263bc
MD		 2598}
2599
2600int
2601bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
2602 struct resource *r)
2603{
2604 /* Propagate up the bus hierarchy until someone handles it. */
2605 if (dev->parent)
0deb64bd 2606 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
984263bc 2607 else
0deb64bd 2608 return(EINVAL);
984263bc
MD		 2609}
2610
2611int
2612bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
2613 struct resource *r)
2614{
2615 /* Propagate up the bus hierarchy until someone handles it. */
2616 if (dev->parent)
0deb64bd 2617 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
984263bc 2618 else
0deb64bd 2619 return(EINVAL);
984263bc
MD		 2620}
2621
2622int
2623bus_generic_deactivate_resource(device_t dev, device_t child, int type,
2624 int rid, struct resource *r)
2625{
2626 /* Propagate up the bus hierarchy until someone handles it. */
2627 if (dev->parent)
0deb64bd
JS		 2628 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
2629 r));
984263bc 2630 else
0deb64bd 2631 return(EINVAL);
984263bc
MD		 2632}
2633
e126caf1 2634int
2581072f
MD		 2635bus_generic_get_resource(device_t dev, device_t child, int type, int rid,
2636 u_long *startp, u_long *countp)
2637{
2638 int error;
2639
2640 error = ENOENT;
2641 if (dev->parent) {
2642 error = BUS_GET_RESOURCE(dev->parent, child, type, rid,
2643 startp, countp);
2644 }
2645 return (error);
2646}
2647
2648int
2649bus_generic_set_resource(device_t dev, device_t child, int type, int rid,
2650 u_long start, u_long count)
2651{
2652 int error;
2653
2654 error = EINVAL;
2655 if (dev->parent) {
2656 error = BUS_SET_RESOURCE(dev->parent, child, type, rid,
2657 start, count);
2658 }
2659 return (error);
2660}
2661
2662void
2663bus_generic_delete_resource(device_t dev, device_t child, int type, int rid)
e126caf1 2664{
e126caf1 2665 if (dev->parent)
2581072f 2666 BUS_DELETE_RESOURCE(dev, child, type, rid);
e126caf1
MD		 2667}
2668
2669int
2670bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
2671 u_long *startp, u_long *countp)
2672{
0deb64bd
JS		 2673 struct resource_list *rl = NULL;
2674 struct resource_list_entry *rle = NULL;
e126caf1
MD		 2675
2676 rl = BUS_GET_RESOURCE_LIST(dev, child);
2677 if (!rl)
0deb64bd 2678 return(EINVAL);
e126caf1
MD		 2679
2680 rle = resource_list_find(rl, type, rid);
2681 if (!rle)
0deb64bd 2682 return(ENOENT);
e126caf1
MD		 2683
2684 if (startp)
2685 *startp = rle->start;
2686 if (countp)
2687 *countp = rle->count;
2688
0deb64bd 2689 return(0);
e126caf1
MD		 2690}
2691
2692int
2693bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
2694 u_long start, u_long count)
2695{
0deb64bd 2696 struct resource_list *rl = NULL;
e126caf1
MD		 2697
2698 rl = BUS_GET_RESOURCE_LIST(dev, child);
2699 if (!rl)
0deb64bd 2700 return(EINVAL);
e126caf1
MD		 2701
2702 resource_list_add(rl, type, rid, start, (start + count - 1), count);
2703
0deb64bd 2704 return(0);
e126caf1
MD		 2705}
2706
2707void
2708bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
2709{
0deb64bd 2710 struct resource_list *rl = NULL;
e126caf1
MD		 2711
2712 rl = BUS_GET_RESOURCE_LIST(dev, child);
2713 if (!rl)
2714 return;
2715
2716 resource_list_delete(rl, type, rid);
e126caf1
MD		 2717}
2718
2719int
2720bus_generic_rl_release_resource(device_t dev, device_t child, int type,
2721 int rid, struct resource *r)
2722{
0deb64bd 2723 struct resource_list *rl = NULL;
e126caf1
MD		 2724
2725 rl = BUS_GET_RESOURCE_LIST(dev, child);
2726 if (!rl)
0deb64bd 2727 return(EINVAL);
e126caf1 2728
0deb64bd 2729 return(resource_list_release(rl, dev, child, type, rid, r));
e126caf1
MD		 2730}
2731
2732struct resource *
2733bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
2734 int *rid, u_long start, u_long end, u_long count, u_int flags)
2735{
0deb64bd 2736 struct resource_list *rl = NULL;
e126caf1
MD		 2737
2738 rl = BUS_GET_RESOURCE_LIST(dev, child);
2739 if (!rl)
0deb64bd 2740 return(NULL);
e126caf1 2741
0deb64bd 2742 return(resource_list_alloc(rl, dev, child, type, rid,
e126caf1
MD		 2743 start, end, count, flags));
2744}
2745
2746int
2747bus_generic_child_present(device_t bus, device_t child)
2748{
0deb64bd 2749 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
e126caf1
MD		 2750}
2751
2752
984263bc
MD		 2753/*
2754 * Some convenience functions to make it easier for drivers to use the
2755 * resource-management functions. All these really do is hide the
2756 * indirection through the parent's method table, making for slightly
2757 * less-wordy code. In the future, it might make sense for this code
2758 * to maintain some sort of a list of resources allocated by each device.
2759 */
43167546
HT		 2760int
2761bus_alloc_resources(device_t dev, struct resource_spec *rs,
2762 struct resource **res)
2763{
2764 int i;
2765
2766 for (i = 0; rs[i].type != -1; i++)
2767 res[i] = NULL;
2768 for (i = 0; rs[i].type != -1; i++) {
2769 res[i] = bus_alloc_resource_any(dev,
2770 rs[i].type, &rs[i].rid, rs[i].flags);
2771 if (res[i] == NULL) {
2772 bus_release_resources(dev, rs, res);
2773 return (ENXIO);
2774 }
2775 }
2776 return (0);
2777}
2778
2779void
2780bus_release_resources(device_t dev, const struct resource_spec *rs,
2781 struct resource **res)
2782{
2783 int i;
2784
2785 for (i = 0; rs[i].type != -1; i++)
2786 if (res[i] != NULL) {
2787 bus_release_resource(
2788 dev, rs[i].type, rs[i].rid, res[i]);
2789 res[i] = NULL;
2790 }
2791}
2792
984263bc
MD		 2793struct resource *
2794bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
2795 u_long count, u_int flags)
2796{
2797 if (dev->parent == 0)
0deb64bd
JS		 2798 return(0);
2799 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
2800 count, flags));
984263bc
MD		 2801}
2802
2803int
2804bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
2805{
2806 if (dev->parent == 0)
0deb64bd
JS		 2807 return(EINVAL);
2808 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
984263bc
MD		 2809}
2810
2811int
2812bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
2813{
2814 if (dev->parent == 0)
0deb64bd
JS		 2815 return(EINVAL);
2816 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
984263bc
MD		 2817}
2818
2819int
2820bus_release_resource(device_t dev, int type, int rid, struct resource *r)
2821{
2822 if (dev->parent == 0)
0deb64bd
JS		 2823 return(EINVAL);
2824 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
984263bc
MD		 2825}
2826
2827int
2828bus_setup_intr(device_t dev, struct resource *r, int flags,
e9cb6d99
MD		 2829 driver_intr_t handler, void *arg,
2830 void **cookiep, lwkt_serialize_t serializer)
984263bc
MD		 2831{
2832 if (dev->parent == 0)
0deb64bd
JS		 2833 return(EINVAL);
2834 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
e9cb6d99 2835 cookiep, serializer));
984263bc
MD		 2836}
2837
2838int
2839bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
2840{
2841 if (dev->parent == 0)
0deb64bd
JS		 2842 return(EINVAL);
2843 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
984263bc
MD		 2844}
2845
67a2436e
MD		 2846void
2847bus_enable_intr(device_t dev, void *cookie)
2848{
2849 if (dev->parent)
2850 BUS_ENABLE_INTR(dev->parent, dev, cookie);
2851}
2852
e9cb6d99 2853int
67a2436e
MD		 2854bus_disable_intr(device_t dev, void *cookie)
2855{
2856 if (dev->parent)
e9cb6d99
MD		 2857 return(BUS_DISABLE_INTR(dev->parent, dev, cookie));
2858 else
2859 return(0);
67a2436e
MD		 2860}
2861
984263bc
MD		 2862int
2863bus_set_resource(device_t dev, int type, int rid,
2864 u_long start, u_long count)
2865{
0deb64bd
JS		 2866 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
2867 start, count));
984263bc
MD		 2868}
2869
2870int
2871bus_get_resource(device_t dev, int type, int rid,
2872 u_long *startp, u_long *countp)
2873{
0deb64bd
JS		 2874 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2875 startp, countp));
984263bc
MD		 2876}
2877
2878u_long
2879bus_get_resource_start(device_t dev, int type, int rid)
2880{
2881 u_long start, count;
2882 int error;
2883
2884 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2885 &start, &count);
2886 if (error)
0deb64bd
JS		 2887 return(0);
2888 return(start);
984263bc
MD		 2889}
2890
2891u_long
2892bus_get_resource_count(device_t dev, int type, int rid)
2893{
2894 u_long start, count;
2895 int error;
2896
2897 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2898 &start, &count);
2899 if (error)
0deb64bd
JS		 2900 return(0);
2901 return(count);
984263bc
MD		 2902}
2903
2904void
2905bus_delete_resource(device_t dev, int type, int rid)
2906{
2907 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
2908}
2909
cac6f3da
JS		 2910int
2911bus_child_present(device_t child)
2912{
2913 return (BUS_CHILD_PRESENT(device_get_parent(child), child));
2914}
2915
2916int
2917bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
2918{
2919 device_t parent;
2920
2921 parent = device_get_parent(child);
2922 if (parent == NULL) {
2923 *buf = '\0';
2924 return (0);
2925 }
2926 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
2927}
2928
2929int
2930bus_child_location_str(device_t child, char *buf, size_t buflen)
2931{
2932 device_t parent;
2933
2934 parent = device_get_parent(child);
2935 if (parent == NULL) {
2936 *buf = '\0';
2937 return (0);
2938 }
2939 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
2940}
2941
984263bc
MD		 2942static int
2943root_print_child(device_t dev, device_t child)
2944{
0deb64bd 2945 return(0);
984263bc
MD		 2946}
2947
2948static int
2949root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
e9cb6d99 2950 void **cookiep, lwkt_serialize_t serializer)
984263bc
MD		 2951{
2952 /*
2953 * If an interrupt mapping gets to here something bad has happened.
2954 */
2955 panic("root_setup_intr");
2956}
2957
e126caf1
MD		 2958/*
2959 * If we get here, assume that the device is permanant and really is
2960 * present in the system. Removable bus drivers are expected to intercept
2961 * this call long before it gets here. We return -1 so that drivers that
2962 * really care can check vs -1 or some ERRNO returned higher in the food
2963 * chain.
2964 */
2965static int
2966root_child_present(device_t dev, device_t child)
2967{
0deb64bd 2968 return(-1);
e126caf1
MD		 2969}
2970
2971/*
2972 * XXX NOTE! other defaults may be set in bus_if.m
2973 */
80eff43d 2974static kobj_method_t root_methods[] = {
984263bc 2975 /* Device interface */
80eff43d
JR		 2976 KOBJMETHOD(device_shutdown, bus_generic_shutdown),
2977 KOBJMETHOD(device_suspend, bus_generic_suspend),
2978 KOBJMETHOD(device_resume, bus_generic_resume),
984263bc
MD		 2979
2980 /* Bus interface */
2581072f 2981 KOBJMETHOD(bus_add_child, bus_generic_add_child),
80eff43d
JR		 2982 KOBJMETHOD(bus_print_child, root_print_child),
2983 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
2984 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
2985 KOBJMETHOD(bus_setup_intr, root_setup_intr),
e126caf1 2986 KOBJMETHOD(bus_child_present, root_child_present),
984263bc
MD		 2987
2988 { 0, 0 }
2989};
2990
2991static driver_t root_driver = {
2992 "root",
2993 root_methods,
2994 1, /* no softc */
2995};
2996
2997device_t root_bus;
2998devclass_t root_devclass;
2999
3000static int
3001root_bus_module_handler(module_t mod, int what, void* arg)
3002{
0deb64bd
JS		 3003 switch (what) {
3004 case MOD_LOAD:
0010e23a 3005 TAILQ_INIT(&bus_data_devices);
0deb64bd
JS		 3006 root_bus = make_device(NULL, "root", 0);
3007 root_bus->desc = "System root bus";
3008 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
3009 root_bus->driver = &root_driver;
39b5d600 3010 root_bus->state = DS_ALIVE;
91a0c258 3011 root_devclass = devclass_find_internal("root", NULL, FALSE);
71fc104f 3012 devinit();
0deb64bd
JS		 3013 return(0);
3014
3015 case MOD_SHUTDOWN:
3016 device_shutdown(root_bus);
3017 return(0);
3018 default:
3019 return(0);
3020 }
984263bc
MD		 3021}
3022
3023static moduledata_t root_bus_mod = {
3024 "rootbus",
3025 root_bus_module_handler,
3026 0
3027};
3028DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
3029
3030void
3031root_bus_configure(void)
3032{
dbcd0c9b 3033 int warncount;
0deb64bd 3034 device_t dev;
984263bc 3035
0deb64bd 3036 PDEBUG(("."));
984263bc 3037
39b5d600
MD		 3038 /*
3039 * handle device_identify based device attachments to the root_bus
3040 * (typically nexus).
3041 */
3042 bus_generic_probe(root_bus);
3043
3044 /*
3045 * Probe and attach the devices under root_bus.
3046 */
3047 TAILQ_FOREACH(dev, &root_bus->children, link) {
0deb64bd 3048 device_probe_and_attach(dev);
39b5d600 3049 }
dbcd0c9b
MD		 3050
3051 /*
3052 * Wait for all asynchronous attaches to complete. If we don't
3053 * our legacy ISA bus scan could steal device unit numbers or
3054 * even I/O ports.
3055 */
3056 warncount = 10;
3057 if (numasyncthreads)
3058 kprintf("Waiting for async drivers to attach\n");
3059 while (numasyncthreads > 0) {
3060 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK)
3061 --warncount;
3062 if (warncount == 0) {
3063 kprintf("Warning: Still waiting for %d "
3064 "drivers to attach\n", numasyncthreads);
3065 } else if (warncount == -30) {
3066 kprintf("Giving up on %d drivers\n", numasyncthreads);
3067 break;
3068 }
3069 }
39b5d600 3070 root_bus->state = DS_ATTACHED;
984263bc
MD		 3071}
3072
3073int
3074driver_module_handler(module_t mod, int what, void *arg)
3075{
91a0c258 3076 int error;
984263bc
MD		 3077 struct driver_module_data *dmd;
3078 devclass_t bus_devclass;
91a0c258
JS		 3079 kobj_class_t driver;
3080 const char *parentname;
984263bc
MD		 3081
3082 dmd = (struct driver_module_data *)arg;
91a0c258 3083 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
984263bc
MD		 3084 error = 0;
3085
3086 switch (what) {
3087 case MOD_LOAD:
3088 if (dmd->dmd_chainevh)
3089 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3090
91a0c258
JS		 3091 driver = dmd->dmd_driver;
3092 PDEBUG(("Loading module: driver %s on bus %s",
3093 DRIVERNAME(driver), dmd->dmd_busname));
984263bc
MD		 3094
3095 /*
91a0c258
JS		 3096 * If the driver has any base classes, make the
3097 * devclass inherit from the devclass of the driver's
3098 * first base class. This will allow the system to
3099 * search for drivers in both devclasses for children
3100 * of a device using this driver.
984263bc 3101 */
91a0c258
JS		 3102 if (driver->baseclasses)
3103 parentname = driver->baseclasses[0]->name;
3104 else
3105 parentname = NULL;
0b9823be 3106 *dmd->dmd_devclass = devclass_find_internal(driver->name,
91a0c258 3107 parentname, TRUE);
0b9823be
SS		 3108
3109 error = devclass_add_driver(bus_devclass, driver);
3110 if (error)
3111 break;
984263bc
MD		 3112 break;
3113
3114 case MOD_UNLOAD:
91a0c258
JS		 3115 PDEBUG(("Unloading module: driver %s from bus %s",
3116 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
3117 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
984263bc
MD		 3118
3119 if (!error && dmd->dmd_chainevh)
3120 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3121 break;
3122 }
3123
3124 return (error);
3125}
3126
3127#ifdef BUS_DEBUG
3128
0deb64bd
JS		 3129/*
3130 * The _short versions avoid iteration by not calling anything that prints
984263bc
MD		 3131 * more than oneliners. I love oneliners.
3132 */
3133
3134static void
984263bc
MD		 3135print_device_short(device_t dev, int indent)
3136{
3137 if (!dev)
3138 return;
3139
3140 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
0deb64bd
JS		 3141 dev->unit, dev->desc,
3142 (dev->parent? "":"no "),
3143 (TAILQ_EMPTY(&dev->children)? "no ":""),
3144 (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
3145 (dev->flags&DF_FIXEDCLASS? "fixed,":""),
3146 (dev->flags&DF_WILDCARD? "wildcard,":""),
3147 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
3148 (dev->ivars? "":"no "),
3149 (dev->softc? "":"no "),
3150 dev->busy));
984263bc
MD		 3151}
3152
3153static void
3154print_device(device_t dev, int indent)
3155{
3156 if (!dev)
3157 return;
3158
3159 print_device_short(dev, indent);
3160
3161 indentprintf(("Parent:\n"));
3162 print_device_short(dev->parent, indent+1);
984263bc
MD		 3163 indentprintf(("Driver:\n"));
3164 print_driver_short(dev->driver, indent+1);
3165 indentprintf(("Devclass:\n"));
3166 print_devclass_short(dev->devclass, indent+1);
3167}
3168
0deb64bd
JS		 3169/*
3170 * Print the device and all its children (indented).
3171 */
984263bc
MD		 3172void
3173print_device_tree_short(device_t dev, int indent)
984263bc
MD		 3174{
3175 device_t child;
3176
3177 if (!dev)
3178 return;
3179
3180 print_device_short(dev, indent);
3181
0deb64bd 3182 TAILQ_FOREACH(child, &dev->children, link)
984263bc
MD		 3183 print_device_tree_short(child, indent+1);
3184}
3185
0deb64bd
JS		 3186/*
3187 * Print the device and all its children (indented).
3188 */
984263bc
MD		 3189void
3190print_device_tree(device_t dev, int indent)
984263bc
MD		 3191{
3192 device_t child;
3193
3194 if (!dev)
3195 return;
3196
3197 print_device(dev, indent);
3198
0deb64bd 3199 TAILQ_FOREACH(child, &dev->children, link)
984263bc
MD		 3200 print_device_tree(child, indent+1);
3201}
3202
3203static void
3204print_driver_short(driver_t *driver, int indent)
3205{
3206 if (!driver)
3207 return;
3208
1b0caf12 3209 indentprintf(("driver %s: softc size = %zu\n",
0deb64bd 3210 driver->name, driver->size));
984263bc
MD		 3211}
3212
3213static void
3214print_driver(driver_t *driver, int indent)
3215{
3216 if (!driver)
3217 return;
3218
3219 print_driver_short(driver, indent);
984263bc
MD		 3220}
3221
3222
3223static void
3224print_driver_list(driver_list_t drivers, int indent)
3225{
3226 driverlink_t driver;
3227
0deb64bd 3228 TAILQ_FOREACH(driver, &drivers, link)
984263bc
MD		 3229 print_driver(driver->driver, indent);
3230}
3231
3232static void
3233print_devclass_short(devclass_t dc, int indent)
3234{
0deb64bd 3235 if (!dc)
984263bc
MD		 3236 return;
3237
0deb64bd 3238 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
984263bc
MD		 3239}
3240
3241static void
3242print_devclass(devclass_t dc, int indent)
3243{
3244 int i;
3245
0deb64bd 3246 if (!dc)
984263bc
MD		 3247 return;
3248
3249 print_devclass_short(dc, indent);
3250 indentprintf(("Drivers:\n"));
3251 print_driver_list(dc->drivers, indent+1);
3252
3253 indentprintf(("Devices:\n"));
3254 for (i = 0; i < dc->maxunit; i++)
3255 if (dc->devices[i])
3256 print_device(dc->devices[i], indent+1);
3257}
3258
3259void
3260print_devclass_list_short(void)
3261{
3262 devclass_t dc;
3263
6ea70f76 3264 kprintf("Short listing of devclasses, drivers & devices:\n");
8d0e5ff2 3265 TAILQ_FOREACH(dc, &devclasses, link) {
984263bc 3266 print_devclass_short(dc, 0);
8d0e5ff2 3267 }
984263bc
MD		 3268}
3269
3270void
3271print_devclass_list(void)
3272{
3273 devclass_t dc;
3274
6ea70f76 3275 kprintf("Full listing of devclasses, drivers & devices:\n");
8d0e5ff2 3276 TAILQ_FOREACH(dc, &devclasses, link) {
984263bc 3277 print_devclass(dc, 0);
8d0e5ff2 3278 }
984263bc
MD		 3279}
3280
3281#endif
e126caf1
MD		 3282
3283/*
3284 * Check to see if a device is disabled via a disabled hint.
3285 */
3286int
3287resource_disabled(const char *name, int unit)
3288{
3289 int error, value;
3290
3291 error = resource_int_value(name, unit, "disabled", &value);
3292 if (error)
0deb64bd
JS		 3293 return(0);
3294 return(value);
e126caf1 3295}
0010e23a
HT		 3296
3297/*
3298 * User-space access to the device tree.
3299 *
3300 * We implement a small set of nodes:
3301 *
3302 * hw.bus Single integer read method to obtain the
3303 * current generation count.
3304 * hw.bus.devices Reads the entire device tree in flat space.
3305 * hw.bus.rman Resource manager interface
3306 *
3307 * We might like to add the ability to scan devclasses and/or drivers to
3308 * determine what else is currently loaded/available.
3309 */
3310
3311static int
3312sysctl_bus(SYSCTL_HANDLER_ARGS)
3313{
3314 struct u_businfo ubus;
3315
3316 ubus.ub_version = BUS_USER_VERSION;
3317 ubus.ub_generation = bus_data_generation;
3318
3319 return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
3320}
3321SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
3322 "bus-related data");
3323
3324static int
3325sysctl_devices(SYSCTL_HANDLER_ARGS)
3326{
3327 int *name = (int *)arg1;
3328 u_int namelen = arg2;
3329 int index;
3330 struct device *dev;
3331 struct u_device udev; /* XXX this is a bit big */
3332 int error;
3333
3334 if (namelen != 2)
3335 return (EINVAL);
3336
3337 if (bus_data_generation_check(name[0]))
3338 return (EINVAL);
3339
3340 index = name[1];
3341
3342 /*
3343 * Scan the list of devices, looking for the requested index.
3344 */
3345 TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
3346 if (index-- == 0)
3347 break;
3348 }
3349 if (dev == NULL)
3350 return (ENOENT);
3351
3352 /*
3353 * Populate the return array.
3354 */
3355 bzero(&udev, sizeof(udev));
3356 udev.dv_handle = (uintptr_t)dev;
3357 udev.dv_parent = (uintptr_t)dev->parent;
3358 if (dev->nameunit != NULL)
3359 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
3360 if (dev->desc != NULL)
3361 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
3362 if (dev->driver != NULL && dev->driver->name != NULL)
3363 strlcpy(udev.dv_drivername, dev->driver->name,
3364 sizeof(udev.dv_drivername));
3365 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
3366 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
3367 udev.dv_devflags = dev->devflags;
3368 udev.dv_flags = dev->flags;
3369 udev.dv_state = dev->state;
3370 error = SYSCTL_OUT(req, &udev, sizeof(udev));
3371 return (error);
3372}
3373
3374SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
3375 "system device tree");
3376
3377int
3378bus_data_generation_check(int generation)
3379{
3380 if (generation != bus_data_generation)
3381 return (1);
3382
3383 /* XXX generate optimised lists here? */
3384 return (0);
3385}
3386
3387void
3388bus_data_generation_update(void)
3389{
3390 bus_data_generation++;
3391}
DragonFly Project GIT Source repo