2 * Copyright (c) 1997,1998 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $
31 #include <sys/param.h>
32 #include <sys/queue.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
37 #include <sys/bus_private.h>
38 #include <sys/sysctl.h>
39 #include <sys/systm.h>
42 #include <sys/device.h>
46 #include <sys/filio.h>
47 #include <sys/event.h>
48 #include <sys/signalvar.h>
49 #include <sys/machintr.h>
51 #include <machine/stdarg.h> /* for device_printf() */
53 #include <sys/thread2.h>
54 #include <sys/mplock2.h>
56 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL);
58 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
61 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n"))
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")
66 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
67 * prevent syslog from deleting initial spaces
69 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0)
71 static void print_device_short(device_t dev, int indent);
72 static void print_device(device_t dev, int indent);
73 void print_device_tree_short(device_t dev, int indent);
74 void print_device_tree(device_t dev, int indent);
75 static void print_driver_short(driver_t *driver, int indent);
76 static void print_driver(driver_t *driver, int indent);
77 static void print_driver_list(driver_list_t drivers, int indent);
78 static void print_devclass_short(devclass_t dc, int indent);
79 static void print_devclass(devclass_t dc, int indent);
80 void print_devclass_list_short(void);
81 void print_devclass_list(void);
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 */
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 */
103 static void device_attach_async(device_t dev);
104 static void device_attach_thread(void *arg);
105 static int device_doattach(device_t dev);
107 static int do_async_attach = 0;
108 static int numasyncthreads;
109 TUNABLE_INT("kern.do_async_attach", &do_async_attach);
112 * /dev/devctl implementation
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.
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
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!
132 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS);
133 static int devctl_disable = 0;
134 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable);
135 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0,
136 sysctl_devctl_disable, "I", "devctl disable");
138 static d_open_t devopen;
139 static d_close_t devclose;
140 static d_read_t devread;
141 static d_ioctl_t devioctl;
142 static d_kqfilter_t devkqfilter;
144 static struct dev_ops devctl_ops = {
150 .d_kqfilter = devkqfilter
153 struct dev_event_info
156 TAILQ_ENTRY(dev_event_info) dei_link;
159 TAILQ_HEAD(devq, dev_event_info);
161 static struct dev_softc
168 struct proc *async_proc;
174 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl");
175 lockinit(&devsoftc.lock, "dev mtx", 0, 0);
176 TAILQ_INIT(&devsoftc.devq);
180 devopen(struct dev_open_args *ap)
186 devsoftc.nonblock = 0;
187 devsoftc.async_proc = NULL;
192 devclose(struct dev_close_args *ap)
195 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
197 lockmgr(&devsoftc.lock, LK_RELEASE);
203 * The read channel for this device is used to report changes to
204 * userland in realtime. We are required to free the data as well as
205 * the n1 object because we allocate them separately. Also note that
206 * we return one record at a time. If you try to read this device a
207 * character at a time, you will lose the rest of the data. Listening
208 * programs are expected to cope.
211 devread(struct dev_read_args *ap)
213 struct uio *uio = ap->a_uio;
214 struct dev_event_info *n1;
217 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
218 while (TAILQ_EMPTY(&devsoftc.devq)) {
219 if (devsoftc.nonblock) {
220 lockmgr(&devsoftc.lock, LK_RELEASE);
223 tsleep_interlock(&devsoftc, PCATCH);
224 lockmgr(&devsoftc.lock, LK_RELEASE);
225 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0);
226 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
229 * Need to translate ERESTART to EINTR here? -- jake
231 lockmgr(&devsoftc.lock, LK_RELEASE);
235 n1 = TAILQ_FIRST(&devsoftc.devq);
236 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
237 lockmgr(&devsoftc.lock, LK_RELEASE);
238 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio);
239 kfree(n1->dei_data, M_BUS);
245 devioctl(struct dev_ioctl_args *ap)
250 if (*(int*)ap->a_data)
251 devsoftc.nonblock = 1;
253 devsoftc.nonblock = 0;
256 if (*(int*)ap->a_data)
257 devsoftc.async_proc = curproc;
259 devsoftc.async_proc = NULL;
262 /* (un)Support for other fcntl() calls. */
274 static void dev_filter_detach(struct knote *);
275 static int dev_filter_read(struct knote *, long);
277 static struct filterops dev_filtops =
278 { FILTEROP_ISFD, NULL, dev_filter_detach, dev_filter_read };
281 devkqfilter(struct dev_kqfilter_args *ap)
283 struct knote *kn = ap->a_kn;
287 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
289 switch (kn->kn_filter) {
291 kn->kn_fop = &dev_filtops;
294 ap->a_result = EOPNOTSUPP;
295 lockmgr(&devsoftc.lock, LK_RELEASE);
299 klist = &devsoftc.kq.ki_note;
300 knote_insert(klist, kn);
302 lockmgr(&devsoftc.lock, LK_RELEASE);
308 dev_filter_detach(struct knote *kn)
312 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
313 klist = &devsoftc.kq.ki_note;
314 knote_remove(klist, kn);
315 lockmgr(&devsoftc.lock, LK_RELEASE);
319 dev_filter_read(struct knote *kn, long hint)
323 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
324 if (!TAILQ_EMPTY(&devsoftc.devq))
326 lockmgr(&devsoftc.lock, LK_RELEASE);
333 * @brief Return whether the userland process is running
336 devctl_process_running(void)
338 return (devsoftc.inuse == 1);
342 * @brief Queue data to be read from the devctl device
344 * Generic interface to queue data to the devctl device. It is
345 * assumed that @p data is properly formatted. It is further assumed
346 * that @p data is allocated using the M_BUS malloc type.
349 devctl_queue_data(char *data)
351 struct dev_event_info *n1 = NULL;
354 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT);
358 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
359 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link);
361 lockmgr(&devsoftc.lock, LK_RELEASE);
362 get_mplock(); /* XXX */
363 KNOTE(&devsoftc.kq.ki_note, 0);
364 rel_mplock(); /* XXX */
365 p = devsoftc.async_proc;
371 * @brief Send a 'notification' to userland, using standard ways
374 devctl_notify(const char *system, const char *subsystem, const char *type,
381 return; /* BOGUS! Must specify system. */
382 if (subsystem == NULL)
383 return; /* BOGUS! Must specify subsystem. */
385 return; /* BOGUS! Must specify type. */
386 len += strlen(" system=") + strlen(system);
387 len += strlen(" subsystem=") + strlen(subsystem);
388 len += strlen(" type=") + strlen(type);
389 /* add in the data message plus newline. */
392 len += 3; /* '!', '\n', and NUL */
393 msg = kmalloc(len, M_BUS, M_NOWAIT);
395 return; /* Drop it on the floor */
397 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n",
398 system, subsystem, type, data);
400 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n",
401 system, subsystem, type);
402 devctl_queue_data(msg);
406 * Common routine that tries to make sending messages as easy as possible.
407 * We allocate memory for the data, copy strings into that, but do not
408 * free it unless there's an error. The dequeue part of the driver should
409 * free the data. We don't send data when the device is disabled. We do
410 * send data, even when we have no listeners, because we wish to avoid
411 * races relating to startup and restart of listening applications.
413 * devaddq is designed to string together the type of event, with the
414 * object of that event, plus the plug and play info and location info
415 * for that event. This is likely most useful for devices, but less
416 * useful for other consumers of this interface. Those should use
417 * the devctl_queue_data() interface instead.
420 devaddq(const char *type, const char *what, device_t dev)
429 data = kmalloc(1024, M_BUS, M_NOWAIT);
433 /* get the bus specific location of this device */
434 loc = kmalloc(1024, M_BUS, M_NOWAIT);
438 bus_child_location_str(dev, loc, 1024);
440 /* Get the bus specific pnp info of this device */
441 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
445 bus_child_pnpinfo_str(dev, pnp, 1024);
447 /* Get the parent of this device, or / if high enough in the tree. */
448 if (device_get_parent(dev) == NULL)
449 parstr = "."; /* Or '/' ? */
451 parstr = device_get_nameunit(device_get_parent(dev));
452 /* String it all together. */
453 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp,
457 devctl_queue_data(data);
467 * A device was added to the tree. We are called just after it successfully
468 * attaches (that is, probe and attach success for this device). No call
469 * is made if a device is merely parented into the tree. See devnomatch
470 * if probe fails. If attach fails, no notification is sent (but maybe
471 * we should have a different message for this).
474 devadded(device_t dev)
479 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
482 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
486 bus_child_pnpinfo_str(dev, pnp, 1024);
487 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
488 devaddq("+", tmp, dev);
498 * A device was removed from the tree. We are called just before this
502 devremoved(device_t dev)
507 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
510 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
514 bus_child_pnpinfo_str(dev, pnp, 1024);
515 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
516 devaddq("-", tmp, dev);
526 * Called when there's no match for this device. This is only called
527 * the first time that no match happens, so we don't keep getitng this
528 * message. Should that prove to be undesirable, we can change it.
529 * This is called when all drivers that can attach to a given bus
530 * decline to accept this device. Other errrors may not be detected.
533 devnomatch(device_t dev)
535 devaddq("?", "", dev);
539 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS)
541 struct dev_event_info *n1;
544 dis = devctl_disable;
545 error = sysctl_handle_int(oidp, &dis, 0, req);
546 if (error || !req->newptr)
548 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
549 devctl_disable = dis;
551 while (!TAILQ_EMPTY(&devsoftc.devq)) {
552 n1 = TAILQ_FIRST(&devsoftc.devq);
553 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
554 kfree(n1->dei_data, M_BUS);
558 lockmgr(&devsoftc.lock, LK_RELEASE);
562 /* End of /dev/devctl code */
564 TAILQ_HEAD(,device) bus_data_devices;
565 static int bus_data_generation = 1;
567 kobj_method_t null_methods[] = {
571 DEFINE_CLASS(null, null_methods, 0);
574 * Devclass implementation
577 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
580 devclass_find_internal(const char *classname, const char *parentname,
585 PDEBUG(("looking for %s", classname));
586 if (classname == NULL)
589 TAILQ_FOREACH(dc, &devclasses, link)
590 if (!strcmp(dc->name, classname))
594 PDEBUG(("creating %s", classname));
595 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1,
596 M_BUS, M_INTWAIT | M_ZERO);
600 dc->name = (char*) (dc + 1);
601 strcpy(dc->name, classname);
604 TAILQ_INIT(&dc->drivers);
605 TAILQ_INSERT_TAIL(&devclasses, dc, link);
607 bus_data_generation_update();
612 * If a parent class is specified, then set that as our parent so
613 * that this devclass will support drivers for the parent class as
614 * well. If the parent class has the same name don't do this though
615 * as it creates a cycle that can trigger an infinite loop in
616 * device_probe_child() if a device exists for which there is no
619 if (parentname && dc && !dc->parent &&
620 strcmp(classname, parentname) != 0)
621 dc->parent = devclass_find_internal(parentname, NULL, FALSE);
627 devclass_create(const char *classname)
629 return(devclass_find_internal(classname, NULL, TRUE));
633 devclass_find(const char *classname)
635 return(devclass_find_internal(classname, NULL, FALSE));
639 devclass_find_unit(const char *classname, int unit)
643 if ((dc = devclass_find(classname)) != NULL)
644 return(devclass_get_device(dc, unit));
649 devclass_add_driver(devclass_t dc, driver_t *driver)
655 PDEBUG(("%s", DRIVERNAME(driver)));
657 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
662 * Compile the driver's methods. Also increase the reference count
663 * so that the class doesn't get freed when the last instance
664 * goes. This means we can safely use static methods and avoids a
665 * double-free in devclass_delete_driver.
667 kobj_class_instantiate(driver);
670 * Make sure the devclass which the driver is implementing exists.
672 devclass_find_internal(driver->name, NULL, TRUE);
675 TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
678 * Call BUS_DRIVER_ADDED for any existing busses in this class,
679 * but only if the bus has already been attached (otherwise we
680 * might probe too early).
682 * This is what will cause a newly loaded module to be associated
683 * with hardware. bus_generic_driver_added() is typically what ends
686 for (i = 0; i < dc->maxunit; i++) {
687 if ((dev = dc->devices[i]) != NULL) {
688 if (dev->state >= DS_ATTACHED)
689 BUS_DRIVER_ADDED(dev, driver);
693 bus_data_generation_update();
698 devclass_delete_driver(devclass_t busclass, driver_t *driver)
700 devclass_t dc = devclass_find(driver->name);
706 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
712 * Find the link structure in the bus' list of drivers.
714 TAILQ_FOREACH(dl, &busclass->drivers, link)
715 if (dl->driver == driver)
719 PDEBUG(("%s not found in %s list", driver->name, busclass->name));
724 * Disassociate from any devices. We iterate through all the
725 * devices in the devclass of the driver and detach any which are
726 * using the driver and which have a parent in the devclass which
727 * we are deleting from.
729 * Note that since a driver can be in multiple devclasses, we
730 * should not detach devices which are not children of devices in
731 * the affected devclass.
733 for (i = 0; i < dc->maxunit; i++)
734 if (dc->devices[i]) {
735 dev = dc->devices[i];
736 if (dev->driver == driver && dev->parent &&
737 dev->parent->devclass == busclass) {
738 if ((error = device_detach(dev)) != 0)
740 device_set_driver(dev, NULL);
744 TAILQ_REMOVE(&busclass->drivers, dl, link);
747 kobj_class_uninstantiate(driver);
749 bus_data_generation_update();
754 devclass_find_driver_internal(devclass_t dc, const char *classname)
758 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
760 TAILQ_FOREACH(dl, &dc->drivers, link)
761 if (!strcmp(dl->driver->name, classname))
764 PDEBUG(("not found"));
769 devclass_find_driver(devclass_t dc, const char *classname)
773 dl = devclass_find_driver_internal(dc, classname);
781 devclass_get_name(devclass_t dc)
787 devclass_get_device(devclass_t dc, int unit)
789 if (dc == NULL || unit < 0 || unit >= dc->maxunit)
791 return(dc->devices[unit]);
795 devclass_get_softc(devclass_t dc, int unit)
799 dev = devclass_get_device(dc, unit);
803 return(device_get_softc(dev));
807 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
814 for (i = 0; i < dc->maxunit; i++)
818 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
823 for (i = 0; i < dc->maxunit; i++)
824 if (dc->devices[i]) {
825 list[count] = dc->devices[i];
836 * @brief Get a list of drivers in the devclass
838 * An array containing a list of pointers to all the drivers in the
839 * given devclass is allocated and returned in @p *listp. The number
840 * of drivers in the array is returned in @p *countp. The caller should
841 * free the array using @c free(p, M_TEMP).
843 * @param dc the devclass to examine
844 * @param listp gives location for array pointer return value
845 * @param countp gives location for number of array elements
849 * @retval ENOMEM the array allocation failed
852 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp)
859 TAILQ_FOREACH(dl, &dc->drivers, link)
861 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT);
866 TAILQ_FOREACH(dl, &dc->drivers, link) {
867 list[count] = dl->driver;
877 * @brief Get the number of devices in a devclass
879 * @param dc the devclass to examine
882 devclass_get_count(devclass_t dc)
887 for (i = 0; i < dc->maxunit; i++)
894 devclass_get_maxunit(devclass_t dc)
900 devclass_set_parent(devclass_t dc, devclass_t pdc)
906 devclass_get_parent(devclass_t dc)
912 devclass_alloc_unit(devclass_t dc, int *unitp)
916 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
918 /* If we have been given a wired unit number, check for existing device */
920 if (unit >= 0 && unit < dc->maxunit &&
921 dc->devices[unit] != NULL) {
923 kprintf("%s-: %s%d exists, using next available unit number\n",
924 dc->name, dc->name, unit);
925 /* find the next available slot */
926 while (++unit < dc->maxunit && dc->devices[unit] != NULL)
930 /* Unwired device, find the next available slot for it */
932 while (unit < dc->maxunit && dc->devices[unit] != NULL)
937 * We've selected a unit beyond the length of the table, so let's
938 * extend the table to make room for all units up to and including
941 if (unit >= dc->maxunit) {
945 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
946 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS,
950 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
952 kfree(dc->devices, M_BUS);
953 dc->devices = newlist;
954 dc->maxunit = newsize;
956 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
963 devclass_add_device(devclass_t dc, device_t dev)
967 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
969 buflen = strlen(dc->name) + 5;
970 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
974 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
975 kfree(dev->nameunit, M_BUS);
976 dev->nameunit = NULL;
979 dc->devices[dev->unit] = dev;
981 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
987 devclass_delete_device(devclass_t dc, device_t dev)
992 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
994 if (dev->devclass != dc || dc->devices[dev->unit] != dev)
995 panic("devclass_delete_device: inconsistent device class");
996 dc->devices[dev->unit] = NULL;
997 if (dev->flags & DF_WILDCARD)
999 dev->devclass = NULL;
1000 kfree(dev->nameunit, M_BUS);
1001 dev->nameunit = NULL;
1007 make_device(device_t parent, const char *name, int unit)
1012 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
1015 dc = devclass_find_internal(name, NULL, TRUE);
1017 kprintf("make_device: can't find device class %s\n", name);
1023 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO);
1027 dev->parent = parent;
1028 TAILQ_INIT(&dev->children);
1029 kobj_init((kobj_t) dev, &null_class);
1031 dev->devclass = NULL;
1033 dev->nameunit = NULL;
1037 dev->flags = DF_ENABLED;
1040 dev->flags |= DF_WILDCARD;
1042 dev->flags |= DF_FIXEDCLASS;
1043 if (devclass_add_device(dc, dev) != 0) {
1044 kobj_delete((kobj_t)dev, M_BUS);
1051 dev->state = DS_NOTPRESENT;
1053 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
1054 bus_data_generation_update();
1060 device_print_child(device_t dev, device_t child)
1064 if (device_is_alive(child))
1065 retval += BUS_PRINT_CHILD(dev, child);
1067 retval += device_printf(child, " not found\n");
1073 device_add_child(device_t dev, const char *name, int unit)
1075 return device_add_child_ordered(dev, 0, name, unit);
1079 device_add_child_ordered(device_t dev, int order, const char *name, int unit)
1084 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
1087 child = make_device(dev, name, unit);
1090 child->order = order;
1092 TAILQ_FOREACH(place, &dev->children, link)
1093 if (place->order > order)
1098 * The device 'place' is the first device whose order is
1099 * greater than the new child.
1101 TAILQ_INSERT_BEFORE(place, child, link);
1104 * The new child's order is greater or equal to the order of
1105 * any existing device. Add the child to the tail of the list.
1107 TAILQ_INSERT_TAIL(&dev->children, child, link);
1110 bus_data_generation_update();
1115 device_delete_child(device_t dev, device_t child)
1118 device_t grandchild;
1120 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
1122 /* remove children first */
1123 while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
1124 error = device_delete_child(child, grandchild);
1129 if ((error = device_detach(child)) != 0)
1131 if (child->devclass)
1132 devclass_delete_device(child->devclass, child);
1133 TAILQ_REMOVE(&dev->children, child, link);
1134 TAILQ_REMOVE(&bus_data_devices, child, devlink);
1135 device_set_desc(child, NULL);
1136 kobj_delete((kobj_t)child, M_BUS);
1138 bus_data_generation_update();
1143 * @brief Find a device given a unit number
1145 * This is similar to devclass_get_devices() but only searches for
1146 * devices which have @p dev as a parent.
1148 * @param dev the parent device to search
1149 * @param unit the unit number to search for. If the unit is -1,
1150 * return the first child of @p dev which has name
1151 * @p classname (that is, the one with the lowest unit.)
1153 * @returns the device with the given unit number or @c
1154 * NULL if there is no such device
1157 device_find_child(device_t dev, const char *classname, int unit)
1162 dc = devclass_find(classname);
1167 child = devclass_get_device(dc, unit);
1168 if (child && child->parent == dev)
1171 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) {
1172 child = devclass_get_device(dc, unit);
1173 if (child && child->parent == dev)
1181 first_matching_driver(devclass_t dc, device_t dev)
1184 return(devclass_find_driver_internal(dc, dev->devclass->name));
1186 return(TAILQ_FIRST(&dc->drivers));
1190 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
1192 if (dev->devclass) {
1194 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
1195 if (!strcmp(dev->devclass->name, dl->driver->name))
1199 return(TAILQ_NEXT(last, link));
1203 device_probe_child(device_t dev, device_t child)
1206 driverlink_t best = 0;
1208 int result, pri = 0;
1209 int hasclass = (child->devclass != 0);
1213 panic("device_probe_child: parent device has no devclass");
1215 if (child->state == DS_ALIVE)
1218 for (; dc; dc = dc->parent) {
1219 for (dl = first_matching_driver(dc, child); dl;
1220 dl = next_matching_driver(dc, child, dl)) {
1221 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1222 device_set_driver(child, dl->driver);
1224 device_set_devclass(child, dl->driver->name);
1225 result = DEVICE_PROBE(child);
1227 device_set_devclass(child, 0);
1230 * If the driver returns SUCCESS, there can be
1231 * no higher match for this device.
1240 * The driver returned an error so it
1241 * certainly doesn't match.
1244 device_set_driver(child, 0);
1249 * A priority lower than SUCCESS, remember the
1250 * best matching driver. Initialise the value
1251 * of pri for the first match.
1253 if (best == 0 || result > pri) {
1260 * If we have unambiguous match in this devclass,
1261 * don't look in the parent.
1263 if (best && pri == 0)
1268 * If we found a driver, change state and initialise the devclass.
1271 if (!child->devclass)
1272 device_set_devclass(child, best->driver->name);
1273 device_set_driver(child, best->driver);
1276 * A bit bogus. Call the probe method again to make
1277 * sure that we have the right description.
1279 DEVICE_PROBE(child);
1282 bus_data_generation_update();
1283 child->state = DS_ALIVE;
1291 device_get_parent(device_t dev)
1297 device_get_children(device_t dev, device_t **devlistp, int *devcountp)
1304 TAILQ_FOREACH(child, &dev->children, link)
1307 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
1312 TAILQ_FOREACH(child, &dev->children, link) {
1313 list[count] = child;
1324 device_get_driver(device_t dev)
1326 return(dev->driver);
1330 device_get_devclass(device_t dev)
1332 return(dev->devclass);
1336 device_get_name(device_t dev)
1339 return devclass_get_name(dev->devclass);
1344 device_get_nameunit(device_t dev)
1346 return(dev->nameunit);
1350 device_get_unit(device_t dev)
1356 device_get_desc(device_t dev)
1362 device_get_flags(device_t dev)
1364 return(dev->devflags);
1368 device_print_prettyname(device_t dev)
1370 const char *name = device_get_name(dev);
1373 return kprintf("unknown: ");
1375 return kprintf("%s%d: ", name, device_get_unit(dev));
1379 device_printf(device_t dev, const char * fmt, ...)
1384 retval = device_print_prettyname(dev);
1385 __va_start(ap, fmt);
1386 retval += kvprintf(fmt, ap);
1392 device_set_desc_internal(device_t dev, const char* desc, int copy)
1394 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
1395 kfree(dev->desc, M_BUS);
1396 dev->flags &= ~DF_DESCMALLOCED;
1401 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
1403 strcpy(dev->desc, desc);
1404 dev->flags |= DF_DESCMALLOCED;
1407 /* Avoid a -Wcast-qual warning */
1408 dev->desc = (char *)(uintptr_t) desc;
1411 bus_data_generation_update();
1415 device_set_desc(device_t dev, const char* desc)
1417 device_set_desc_internal(dev, desc, FALSE);
1421 device_set_desc_copy(device_t dev, const char* desc)
1423 device_set_desc_internal(dev, desc, TRUE);
1427 device_set_flags(device_t dev, uint32_t flags)
1429 dev->devflags = flags;
1433 device_get_softc(device_t dev)
1439 device_set_softc(device_t dev, void *softc)
1441 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
1442 kfree(dev->softc, M_BUS);
1445 dev->flags |= DF_EXTERNALSOFTC;
1447 dev->flags &= ~DF_EXTERNALSOFTC;
1451 device_set_async_attach(device_t dev, int enable)
1454 dev->flags |= DF_ASYNCPROBE;
1456 dev->flags &= ~DF_ASYNCPROBE;
1460 device_get_ivars(device_t dev)
1466 device_set_ivars(device_t dev, void * ivars)
1475 device_get_state(device_t dev)
1481 device_enable(device_t dev)
1483 dev->flags |= DF_ENABLED;
1487 device_disable(device_t dev)
1489 dev->flags &= ~DF_ENABLED;
1496 device_busy(device_t dev)
1498 if (dev->state < DS_ATTACHED)
1499 panic("device_busy: called for unattached device");
1500 if (dev->busy == 0 && dev->parent)
1501 device_busy(dev->parent);
1503 dev->state = DS_BUSY;
1510 device_unbusy(device_t dev)
1512 if (dev->state != DS_BUSY)
1513 panic("device_unbusy: called for non-busy device");
1515 if (dev->busy == 0) {
1517 device_unbusy(dev->parent);
1518 dev->state = DS_ATTACHED;
1523 device_quiet(device_t dev)
1525 dev->flags |= DF_QUIET;
1529 device_verbose(device_t dev)
1531 dev->flags &= ~DF_QUIET;
1535 device_is_quiet(device_t dev)
1537 return((dev->flags & DF_QUIET) != 0);
1541 device_is_enabled(device_t dev)
1543 return((dev->flags & DF_ENABLED) != 0);
1547 device_is_alive(device_t dev)
1549 return(dev->state >= DS_ALIVE);
1553 device_is_attached(device_t dev)
1555 return(dev->state >= DS_ATTACHED);
1559 device_set_devclass(device_t dev, const char *classname)
1566 devclass_delete_device(dev->devclass, dev);
1570 if (dev->devclass) {
1571 kprintf("device_set_devclass: device class already set\n");
1575 dc = devclass_find_internal(classname, NULL, TRUE);
1579 error = devclass_add_device(dc, dev);
1581 bus_data_generation_update();
1586 device_set_driver(device_t dev, driver_t *driver)
1588 if (dev->state >= DS_ATTACHED)
1591 if (dev->driver == driver)
1594 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
1595 kfree(dev->softc, M_BUS);
1598 kobj_delete((kobj_t) dev, 0);
1599 dev->driver = driver;
1601 kobj_init((kobj_t) dev, (kobj_class_t) driver);
1602 if (!(dev->flags & DF_EXTERNALSOFTC)) {
1603 dev->softc = kmalloc(driver->size, M_BUS,
1604 M_INTWAIT | M_ZERO);
1606 kobj_delete((kobj_t)dev, 0);
1607 kobj_init((kobj_t) dev, &null_class);
1613 kobj_init((kobj_t) dev, &null_class);
1616 bus_data_generation_update();
1621 device_probe_and_attach(device_t dev)
1623 device_t bus = dev->parent;
1626 if (dev->state >= DS_ALIVE)
1629 if ((dev->flags & DF_ENABLED) == 0) {
1631 device_print_prettyname(dev);
1632 kprintf("not probed (disabled)\n");
1637 error = device_probe_child(bus, dev);
1639 if (!(dev->flags & DF_DONENOMATCH)) {
1640 BUS_PROBE_NOMATCH(bus, dev);
1642 dev->flags |= DF_DONENOMATCH;
1648 * Output the exact device chain prior to the attach in case the
1649 * system locks up during attach, and generate the full info after
1650 * the attach so correct irq and other information is displayed.
1652 if (bootverbose && !device_is_quiet(dev)) {
1655 kprintf("%s", device_get_nameunit(dev));
1656 for (tmp = dev->parent; tmp; tmp = tmp->parent)
1657 kprintf(".%s", device_get_nameunit(tmp));
1660 if (!device_is_quiet(dev))
1661 device_print_child(bus, dev);
1662 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
1663 kprintf("%s: probing asynchronously\n",
1664 device_get_nameunit(dev));
1665 dev->state = DS_INPROGRESS;
1666 device_attach_async(dev);
1669 error = device_doattach(dev);
1675 * Device is known to be alive, do the attach asynchronously.
1676 * However, serialize the attaches with the mp lock.
1679 device_attach_async(device_t dev)
1683 atomic_add_int(&numasyncthreads, 1);
1684 lwkt_create(device_attach_thread, dev, &td, NULL,
1685 0, 0, (dev->desc ? dev->desc : "devattach"));
1689 device_attach_thread(void *arg)
1693 get_mplock(); /* XXX replace with devattach_token later */
1694 (void)device_doattach(dev);
1695 atomic_subtract_int(&numasyncthreads, 1);
1696 wakeup(&numasyncthreads);
1697 rel_mplock(); /* XXX replace with devattach_token later */
1701 * Device is known to be alive, do the attach (synchronous or asynchronous)
1704 device_doattach(device_t dev)
1706 device_t bus = dev->parent;
1707 int hasclass = (dev->devclass != 0);
1710 error = DEVICE_ATTACH(dev);
1712 dev->state = DS_ATTACHED;
1713 if (bootverbose && !device_is_quiet(dev))
1714 device_print_child(bus, dev);
1717 kprintf("device_probe_and_attach: %s%d attach returned %d\n",
1718 dev->driver->name, dev->unit, error);
1719 /* Unset the class that was set in device_probe_child */
1721 device_set_devclass(dev, 0);
1722 device_set_driver(dev, NULL);
1723 dev->state = DS_NOTPRESENT;
1729 device_detach(device_t dev)
1733 PDEBUG(("%s", DEVICENAME(dev)));
1734 if (dev->state == DS_BUSY)
1736 if (dev->state != DS_ATTACHED)
1739 if ((error = DEVICE_DETACH(dev)) != 0)
1742 device_printf(dev, "detached\n");
1744 BUS_CHILD_DETACHED(dev->parent, dev);
1746 if (!(dev->flags & DF_FIXEDCLASS))
1747 devclass_delete_device(dev->devclass, dev);
1749 dev->state = DS_NOTPRESENT;
1750 device_set_driver(dev, NULL);
1756 device_shutdown(device_t dev)
1758 if (dev->state < DS_ATTACHED)
1760 PDEBUG(("%s", DEVICENAME(dev)));
1761 return DEVICE_SHUTDOWN(dev);
1765 device_set_unit(device_t dev, int unit)
1770 dc = device_get_devclass(dev);
1771 if (unit < dc->maxunit && dc->devices[unit])
1773 err = devclass_delete_device(dc, dev);
1777 err = devclass_add_device(dc, dev);
1781 bus_data_generation_update();
1785 /*======================================*/
1787 * Access functions for device resources.
1790 /* Supplied by config(8) in ioconf.c */
1791 extern struct config_device config_devtab[];
1792 extern int devtab_count;
1794 /* Runtime version */
1795 struct config_device *devtab = config_devtab;
1798 resource_new_name(const char *name, int unit)
1800 struct config_device *new;
1802 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP,
1803 M_INTWAIT | M_ZERO);
1806 if (devtab && devtab_count > 0)
1807 bcopy(devtab, new, devtab_count * sizeof(*new));
1808 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
1809 if (new[devtab_count].name == NULL) {
1813 strcpy(new[devtab_count].name, name);
1814 new[devtab_count].unit = unit;
1815 new[devtab_count].resource_count = 0;
1816 new[devtab_count].resources = NULL;
1817 if (devtab && devtab != config_devtab)
1818 kfree(devtab, M_TEMP);
1820 return devtab_count++;
1824 resource_new_resname(int j, const char *resname, resource_type type)
1826 struct config_resource *new;
1829 i = devtab[j].resource_count;
1830 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
1833 if (devtab[j].resources && i > 0)
1834 bcopy(devtab[j].resources, new, i * sizeof(*new));
1835 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
1836 if (new[i].name == NULL) {
1840 strcpy(new[i].name, resname);
1842 if (devtab[j].resources)
1843 kfree(devtab[j].resources, M_TEMP);
1844 devtab[j].resources = new;
1845 devtab[j].resource_count = i + 1;
1850 resource_match_string(int i, const char *resname, const char *value)
1853 struct config_resource *res;
1855 for (j = 0, res = devtab[i].resources;
1856 j < devtab[i].resource_count; j++, res++)
1857 if (!strcmp(res->name, resname)
1858 && res->type == RES_STRING
1859 && !strcmp(res->u.stringval, value))
1865 resource_find(const char *name, int unit, const char *resname,
1866 struct config_resource **result)
1869 struct config_resource *res;
1872 * First check specific instances, then generic.
1874 for (i = 0; i < devtab_count; i++) {
1875 if (devtab[i].unit < 0)
1877 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1878 res = devtab[i].resources;
1879 for (j = 0; j < devtab[i].resource_count; j++, res++)
1880 if (!strcmp(res->name, resname)) {
1886 for (i = 0; i < devtab_count; i++) {
1887 if (devtab[i].unit >= 0)
1889 /* XXX should this `&& devtab[i].unit == unit' be here? */
1890 /* XXX if so, then the generic match does nothing */
1891 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1892 res = devtab[i].resources;
1893 for (j = 0; j < devtab[i].resource_count; j++, res++)
1894 if (!strcmp(res->name, resname)) {
1904 resource_int_value(const char *name, int unit, const char *resname, int *result)
1907 struct config_resource *res;
1909 if ((error = resource_find(name, unit, resname, &res)) != 0)
1911 if (res->type != RES_INT)
1913 *result = res->u.intval;
1918 resource_long_value(const char *name, int unit, const char *resname,
1922 struct config_resource *res;
1924 if ((error = resource_find(name, unit, resname, &res)) != 0)
1926 if (res->type != RES_LONG)
1928 *result = res->u.longval;
1933 resource_string_value(const char *name, int unit, const char *resname,
1937 struct config_resource *res;
1939 if ((error = resource_find(name, unit, resname, &res)) != 0)
1941 if (res->type != RES_STRING)
1943 *result = res->u.stringval;
1948 resource_query_string(int i, const char *resname, const char *value)
1954 for (; i < devtab_count; i++)
1955 if (resource_match_string(i, resname, value) >= 0)
1961 resource_locate(int i, const char *resname)
1967 for (; i < devtab_count; i++)
1968 if (!strcmp(devtab[i].name, resname))
1974 resource_count(void)
1976 return(devtab_count);
1980 resource_query_name(int i)
1982 return(devtab[i].name);
1986 resource_query_unit(int i)
1988 return(devtab[i].unit);
1992 resource_create(const char *name, int unit, const char *resname,
1993 resource_type type, struct config_resource **result)
1996 struct config_resource *res = NULL;
1998 for (i = 0; i < devtab_count; i++)
1999 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2000 res = devtab[i].resources;
2004 i = resource_new_name(name, unit);
2007 res = devtab[i].resources;
2009 for (j = 0; j < devtab[i].resource_count; j++, res++)
2010 if (!strcmp(res->name, resname)) {
2014 j = resource_new_resname(i, resname, type);
2017 res = &devtab[i].resources[j];
2023 resource_set_int(const char *name, int unit, const char *resname, int value)
2026 struct config_resource *res;
2028 error = resource_create(name, unit, resname, RES_INT, &res);
2031 if (res->type != RES_INT)
2033 res->u.intval = value;
2038 resource_set_long(const char *name, int unit, const char *resname, long value)
2041 struct config_resource *res;
2043 error = resource_create(name, unit, resname, RES_LONG, &res);
2046 if (res->type != RES_LONG)
2048 res->u.longval = value;
2053 resource_set_string(const char *name, int unit, const char *resname,
2057 struct config_resource *res;
2059 error = resource_create(name, unit, resname, RES_STRING, &res);
2062 if (res->type != RES_STRING)
2064 if (res->u.stringval)
2065 kfree(res->u.stringval, M_TEMP);
2066 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
2067 if (res->u.stringval == NULL)
2069 strcpy(res->u.stringval, value);
2074 resource_cfgload(void *dummy __unused)
2076 struct config_resource *res, *cfgres;
2079 char *name, *resname;
2083 int config_devtab_count;
2085 config_devtab_count = devtab_count;
2089 for (i = 0; i < config_devtab_count; i++) {
2090 name = config_devtab[i].name;
2091 unit = config_devtab[i].unit;
2093 for (j = 0; j < config_devtab[i].resource_count; j++) {
2094 cfgres = config_devtab[i].resources;
2095 resname = cfgres[j].name;
2096 type = cfgres[j].type;
2097 error = resource_create(name, unit, resname, type,
2100 kprintf("create resource %s%d: error %d\n",
2104 if (res->type != type) {
2105 kprintf("type mismatch %s%d: %d != %d\n",
2106 name, unit, res->type, type);
2111 res->u.intval = cfgres[j].u.intval;
2114 res->u.longval = cfgres[j].u.longval;
2117 if (res->u.stringval)
2118 kfree(res->u.stringval, M_TEMP);
2119 stringval = cfgres[j].u.stringval;
2120 res->u.stringval = kmalloc(strlen(stringval) + 1,
2122 if (res->u.stringval == NULL)
2124 strcpy(res->u.stringval, stringval);
2127 panic("unknown resource type %d", type);
2132 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0)
2135 /*======================================*/
2137 * Some useful method implementations to make life easier for bus drivers.
2141 resource_list_init(struct resource_list *rl)
2147 resource_list_free(struct resource_list *rl)
2149 struct resource_list_entry *rle;
2151 while ((rle = SLIST_FIRST(rl)) != NULL) {
2153 panic("resource_list_free: resource entry is busy");
2154 SLIST_REMOVE_HEAD(rl, link);
2160 resource_list_add(struct resource_list *rl, int type, int rid,
2161 u_long start, u_long end, u_long count, int cpuid)
2163 struct resource_list_entry *rle;
2165 rle = resource_list_find(rl, type, rid);
2167 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS,
2170 panic("resource_list_add: can't record entry");
2171 SLIST_INSERT_HEAD(rl, rle, link);
2179 panic("resource_list_add: resource entry is busy");
2186 if (rle->cpuid != -1 && rle->cpuid != cpuid) {
2187 panic("resource_list_add: moving from cpu%d -> cpu%d\n",
2194 struct resource_list_entry*
2195 resource_list_find(struct resource_list *rl,
2198 struct resource_list_entry *rle;
2200 SLIST_FOREACH(rle, rl, link)
2201 if (rle->type == type && rle->rid == rid)
2207 resource_list_delete(struct resource_list *rl,
2210 struct resource_list_entry *rle = resource_list_find(rl, type, rid);
2213 if (rle->res != NULL)
2214 panic("resource_list_delete: resource has not been released");
2215 SLIST_REMOVE(rl, rle, resource_list_entry, link);
2221 resource_list_alloc(struct resource_list *rl,
2222 device_t bus, device_t child,
2224 u_long start, u_long end,
2225 u_long count, u_int flags, int cpuid)
2227 struct resource_list_entry *rle = 0;
2228 int passthrough = (device_get_parent(child) != bus);
2229 int isdefault = (start == 0UL && end == ~0UL);
2232 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2234 start, end, count, flags, cpuid));
2237 rle = resource_list_find(rl, type, *rid);
2240 return(0); /* no resource of that type/rid */
2243 panic("resource_list_alloc: resource entry is busy");
2247 count = max(count, rle->count);
2248 end = max(rle->end, start + count - 1);
2252 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2253 type, rid, start, end, count,
2257 * Record the new range.
2260 rle->start = rman_get_start(rle->res);
2261 rle->end = rman_get_end(rle->res);
2269 resource_list_release(struct resource_list *rl,
2270 device_t bus, device_t child,
2271 int type, int rid, struct resource *res)
2273 struct resource_list_entry *rle = 0;
2274 int passthrough = (device_get_parent(child) != bus);
2278 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2282 rle = resource_list_find(rl, type, rid);
2285 panic("resource_list_release: can't find resource");
2287 panic("resource_list_release: resource entry is not busy");
2289 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2299 resource_list_print_type(struct resource_list *rl, const char *name, int type,
2302 struct resource_list_entry *rle;
2303 int printed, retval;
2307 /* Yes, this is kinda cheating */
2308 SLIST_FOREACH(rle, rl, link) {
2309 if (rle->type == type) {
2311 retval += kprintf(" %s ", name);
2313 retval += kprintf(",");
2315 retval += kprintf(format, rle->start);
2316 if (rle->count > 1) {
2317 retval += kprintf("-");
2318 retval += kprintf(format, rle->start +
2327 * Generic driver/device identify functions. These will install a device
2328 * rendezvous point under the parent using the same name as the driver
2329 * name, which will at a later time be probed and attached.
2331 * These functions are used when the parent does not 'scan' its bus for
2332 * matching devices, or for the particular devices using these functions,
2333 * or when the device is a pseudo or synthesized device (such as can be
2334 * found under firewire and ppbus).
2337 bus_generic_identify(driver_t *driver, device_t parent)
2339 if (parent->state == DS_ATTACHED)
2341 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1);
2346 bus_generic_identify_sameunit(driver_t *driver, device_t parent)
2348 if (parent->state == DS_ATTACHED)
2350 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent));
2355 * Call DEVICE_IDENTIFY for each driver.
2358 bus_generic_probe(device_t dev)
2360 devclass_t dc = dev->devclass;
2363 TAILQ_FOREACH(dl, &dc->drivers, link) {
2364 DEVICE_IDENTIFY(dl->driver, dev);
2371 * This is an aweful hack due to the isa bus and autoconf code not
2372 * probing the ISA devices until after everything else has configured.
2373 * The ISA bus did a dummy attach long ago so we have to set it back
2374 * to an earlier state so the probe thinks its the initial probe and
2377 * XXX remove by properly defering the ISA bus scan.
2380 bus_generic_probe_hack(device_t dev)
2382 if (dev->state == DS_ATTACHED) {
2383 dev->state = DS_ALIVE;
2384 bus_generic_probe(dev);
2385 dev->state = DS_ATTACHED;
2391 bus_generic_attach(device_t dev)
2395 TAILQ_FOREACH(child, &dev->children, link) {
2396 device_probe_and_attach(child);
2403 bus_generic_detach(device_t dev)
2408 if (dev->state != DS_ATTACHED)
2411 TAILQ_FOREACH(child, &dev->children, link)
2412 if ((error = device_detach(child)) != 0)
2419 bus_generic_shutdown(device_t dev)
2423 TAILQ_FOREACH(child, &dev->children, link)
2424 device_shutdown(child);
2430 bus_generic_suspend(device_t dev)
2433 device_t child, child2;
2435 TAILQ_FOREACH(child, &dev->children, link) {
2436 error = DEVICE_SUSPEND(child);
2438 for (child2 = TAILQ_FIRST(&dev->children);
2439 child2 && child2 != child;
2440 child2 = TAILQ_NEXT(child2, link))
2441 DEVICE_RESUME(child2);
2449 bus_generic_resume(device_t dev)
2453 TAILQ_FOREACH(child, &dev->children, link)
2454 DEVICE_RESUME(child);
2455 /* if resume fails, there's nothing we can usefully do... */
2461 bus_print_child_header(device_t dev, device_t child)
2465 if (device_get_desc(child))
2466 retval += device_printf(child, "<%s>", device_get_desc(child));
2468 retval += kprintf("%s", device_get_nameunit(child));
2470 if (child->state != DS_ATTACHED)
2471 kprintf(" [tentative]");
2473 kprintf(" [attached!]");
2479 bus_print_child_footer(device_t dev, device_t child)
2481 return(kprintf(" on %s\n", device_get_nameunit(dev)));
2485 bus_generic_add_child(device_t dev, device_t child, int order,
2486 const char *name, int unit)
2489 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit);
2491 dev = device_add_child_ordered(child, order, name, unit);
2497 bus_generic_print_child(device_t dev, device_t child)
2501 retval += bus_print_child_header(dev, child);
2502 retval += bus_print_child_footer(dev, child);
2508 bus_generic_read_ivar(device_t dev, device_t child, int index,
2514 error = BUS_READ_IVAR(dev->parent, child, index, result);
2521 bus_generic_write_ivar(device_t dev, device_t child, int index,
2527 error = BUS_WRITE_IVAR(dev->parent, child, index, value);
2534 * Resource list are used for iterations, do not recurse.
2536 struct resource_list *
2537 bus_generic_get_resource_list(device_t dev, device_t child)
2543 bus_generic_driver_added(device_t dev, driver_t *driver)
2547 DEVICE_IDENTIFY(driver, dev);
2548 TAILQ_FOREACH(child, &dev->children, link) {
2549 if (child->state == DS_NOTPRESENT)
2550 device_probe_and_attach(child);
2555 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
2556 int flags, driver_intr_t *intr, void *arg,
2557 void **cookiep, lwkt_serialize_t serializer)
2559 /* Propagate up the bus hierarchy until someone handles it. */
2561 return(BUS_SETUP_INTR(dev->parent, child, irq, flags,
2562 intr, arg, cookiep, serializer));
2568 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
2571 /* Propagate up the bus hierarchy until someone handles it. */
2573 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
2579 bus_generic_disable_intr(device_t dev, device_t child, void *cookie)
2582 return(BUS_DISABLE_INTR(dev->parent, child, cookie));
2588 bus_generic_enable_intr(device_t dev, device_t child, void *cookie)
2591 BUS_ENABLE_INTR(dev->parent, child, cookie);
2595 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
2596 enum intr_polarity pol)
2598 /* Propagate up the bus hierarchy until someone handles it. */
2600 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol));
2606 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
2607 u_long start, u_long end, u_long count, u_int flags, int cpuid)
2609 /* Propagate up the bus hierarchy until someone handles it. */
2611 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
2612 start, end, count, flags, cpuid));
2618 bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
2621 /* Propagate up the bus hierarchy until someone handles it. */
2623 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
2629 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
2632 /* Propagate up the bus hierarchy until someone handles it. */
2634 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
2640 bus_generic_deactivate_resource(device_t dev, device_t child, int type,
2641 int rid, struct resource *r)
2643 /* Propagate up the bus hierarchy until someone handles it. */
2645 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
2652 bus_generic_get_resource(device_t dev, device_t child, int type, int rid,
2653 u_long *startp, u_long *countp)
2659 error = BUS_GET_RESOURCE(dev->parent, child, type, rid,
2666 bus_generic_set_resource(device_t dev, device_t child, int type, int rid,
2667 u_long start, u_long count, int cpuid)
2673 error = BUS_SET_RESOURCE(dev->parent, child, type, rid,
2674 start, count, cpuid);
2680 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid)
2683 BUS_DELETE_RESOURCE(dev, child, type, rid);
2687 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
2688 u_long *startp, u_long *countp)
2690 struct resource_list *rl = NULL;
2691 struct resource_list_entry *rle = NULL;
2693 rl = BUS_GET_RESOURCE_LIST(dev, child);
2697 rle = resource_list_find(rl, type, rid);
2702 *startp = rle->start;
2704 *countp = rle->count;
2710 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
2711 u_long start, u_long count, int cpuid)
2713 struct resource_list *rl = NULL;
2715 rl = BUS_GET_RESOURCE_LIST(dev, child);
2719 resource_list_add(rl, type, rid, start, (start + count - 1), count,
2726 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
2728 struct resource_list *rl = NULL;
2730 rl = BUS_GET_RESOURCE_LIST(dev, child);
2734 resource_list_delete(rl, type, rid);
2738 bus_generic_rl_release_resource(device_t dev, device_t child, int type,
2739 int rid, struct resource *r)
2741 struct resource_list *rl = NULL;
2743 rl = BUS_GET_RESOURCE_LIST(dev, child);
2747 return(resource_list_release(rl, dev, child, type, rid, r));
2751 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
2752 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid)
2754 struct resource_list *rl = NULL;
2756 rl = BUS_GET_RESOURCE_LIST(dev, child);
2760 return(resource_list_alloc(rl, dev, child, type, rid,
2761 start, end, count, flags, cpuid));
2765 bus_generic_child_present(device_t bus, device_t child)
2767 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
2772 * Some convenience functions to make it easier for drivers to use the
2773 * resource-management functions. All these really do is hide the
2774 * indirection through the parent's method table, making for slightly
2775 * less-wordy code. In the future, it might make sense for this code
2776 * to maintain some sort of a list of resources allocated by each device.
2779 bus_alloc_resources(device_t dev, struct resource_spec *rs,
2780 struct resource **res)
2784 for (i = 0; rs[i].type != -1; i++)
2786 for (i = 0; rs[i].type != -1; i++) {
2787 res[i] = bus_alloc_resource_any(dev,
2788 rs[i].type, &rs[i].rid, rs[i].flags);
2789 if (res[i] == NULL) {
2790 bus_release_resources(dev, rs, res);
2798 bus_release_resources(device_t dev, const struct resource_spec *rs,
2799 struct resource **res)
2803 for (i = 0; rs[i].type != -1; i++)
2804 if (res[i] != NULL) {
2805 bus_release_resource(
2806 dev, rs[i].type, rs[i].rid, res[i]);
2812 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
2813 u_long count, u_int flags)
2815 if (dev->parent == 0)
2817 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
2822 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags)
2824 if (dev->parent == 0)
2826 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid,
2827 irq, irq, 1, flags, machintr_intr_cpuid(irq));
2831 bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
2833 if (dev->parent == 0)
2835 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2839 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
2841 if (dev->parent == 0)
2843 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2847 bus_release_resource(device_t dev, int type, int rid, struct resource *r)
2849 if (dev->parent == 0)
2851 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
2855 bus_setup_intr(device_t dev, struct resource *r, int flags,
2856 driver_intr_t handler, void *arg,
2857 void **cookiep, lwkt_serialize_t serializer)
2859 if (dev->parent == 0)
2861 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
2862 cookiep, serializer));
2866 bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
2868 if (dev->parent == 0)
2870 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
2874 bus_enable_intr(device_t dev, void *cookie)
2877 BUS_ENABLE_INTR(dev->parent, dev, cookie);
2881 bus_disable_intr(device_t dev, void *cookie)
2884 return(BUS_DISABLE_INTR(dev->parent, dev, cookie));
2890 bus_set_resource(device_t dev, int type, int rid,
2891 u_long start, u_long count, int cpuid)
2893 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
2894 start, count, cpuid));
2898 bus_get_resource(device_t dev, int type, int rid,
2899 u_long *startp, u_long *countp)
2901 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2906 bus_get_resource_start(device_t dev, int type, int rid)
2908 u_long start, count;
2911 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2919 bus_get_resource_count(device_t dev, int type, int rid)
2921 u_long start, count;
2924 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2932 bus_delete_resource(device_t dev, int type, int rid)
2934 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
2938 bus_child_present(device_t child)
2940 return (BUS_CHILD_PRESENT(device_get_parent(child), child));
2944 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
2948 parent = device_get_parent(child);
2949 if (parent == NULL) {
2953 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
2957 bus_child_location_str(device_t child, char *buf, size_t buflen)
2961 parent = device_get_parent(child);
2962 if (parent == NULL) {
2966 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
2970 root_print_child(device_t dev, device_t child)
2976 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
2977 void **cookiep, lwkt_serialize_t serializer)
2980 * If an interrupt mapping gets to here something bad has happened.
2982 panic("root_setup_intr");
2986 * If we get here, assume that the device is permanant and really is
2987 * present in the system. Removable bus drivers are expected to intercept
2988 * this call long before it gets here. We return -1 so that drivers that
2989 * really care can check vs -1 or some ERRNO returned higher in the food
2993 root_child_present(device_t dev, device_t child)
2999 * XXX NOTE! other defaults may be set in bus_if.m
3001 static kobj_method_t root_methods[] = {
3002 /* Device interface */
3003 KOBJMETHOD(device_shutdown, bus_generic_shutdown),
3004 KOBJMETHOD(device_suspend, bus_generic_suspend),
3005 KOBJMETHOD(device_resume, bus_generic_resume),
3008 KOBJMETHOD(bus_add_child, bus_generic_add_child),
3009 KOBJMETHOD(bus_print_child, root_print_child),
3010 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
3011 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
3012 KOBJMETHOD(bus_setup_intr, root_setup_intr),
3013 KOBJMETHOD(bus_child_present, root_child_present),
3018 static driver_t root_driver = {
3025 devclass_t root_devclass;
3028 root_bus_module_handler(module_t mod, int what, void* arg)
3032 TAILQ_INIT(&bus_data_devices);
3033 root_bus = make_device(NULL, "root", 0);
3034 root_bus->desc = "System root bus";
3035 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
3036 root_bus->driver = &root_driver;
3037 root_bus->state = DS_ALIVE;
3038 root_devclass = devclass_find_internal("root", NULL, FALSE);
3043 device_shutdown(root_bus);
3050 static moduledata_t root_bus_mod = {
3052 root_bus_module_handler,
3055 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
3058 root_bus_configure(void)
3066 * handle device_identify based device attachments to the root_bus
3067 * (typically nexus).
3069 bus_generic_probe(root_bus);
3072 * Probe and attach the devices under root_bus.
3074 TAILQ_FOREACH(dev, &root_bus->children, link) {
3075 device_probe_and_attach(dev);
3079 * Wait for all asynchronous attaches to complete. If we don't
3080 * our legacy ISA bus scan could steal device unit numbers or
3084 if (numasyncthreads)
3085 kprintf("Waiting for async drivers to attach\n");
3086 while (numasyncthreads > 0) {
3087 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK)
3089 if (warncount == 0) {
3090 kprintf("Warning: Still waiting for %d "
3091 "drivers to attach\n", numasyncthreads);
3092 } else if (warncount == -30) {
3093 kprintf("Giving up on %d drivers\n", numasyncthreads);
3097 root_bus->state = DS_ATTACHED;
3101 driver_module_handler(module_t mod, int what, void *arg)
3104 struct driver_module_data *dmd;
3105 devclass_t bus_devclass;
3106 kobj_class_t driver;
3107 const char *parentname;
3109 dmd = (struct driver_module_data *)arg;
3110 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
3115 if (dmd->dmd_chainevh)
3116 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3118 driver = dmd->dmd_driver;
3119 PDEBUG(("Loading module: driver %s on bus %s",
3120 DRIVERNAME(driver), dmd->dmd_busname));
3123 * If the driver has any base classes, make the
3124 * devclass inherit from the devclass of the driver's
3125 * first base class. This will allow the system to
3126 * search for drivers in both devclasses for children
3127 * of a device using this driver.
3129 if (driver->baseclasses)
3130 parentname = driver->baseclasses[0]->name;
3133 *dmd->dmd_devclass = devclass_find_internal(driver->name,
3136 error = devclass_add_driver(bus_devclass, driver);
3142 PDEBUG(("Unloading module: driver %s from bus %s",
3143 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
3144 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
3146 if (!error && dmd->dmd_chainevh)
3147 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3157 * The _short versions avoid iteration by not calling anything that prints
3158 * more than oneliners. I love oneliners.
3162 print_device_short(device_t dev, int indent)
3167 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
3168 dev->unit, dev->desc,
3169 (dev->parent? "":"no "),
3170 (TAILQ_EMPTY(&dev->children)? "no ":""),
3171 (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
3172 (dev->flags&DF_FIXEDCLASS? "fixed,":""),
3173 (dev->flags&DF_WILDCARD? "wildcard,":""),
3174 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
3175 (dev->ivars? "":"no "),
3176 (dev->softc? "":"no "),
3181 print_device(device_t dev, int indent)
3186 print_device_short(dev, indent);
3188 indentprintf(("Parent:\n"));
3189 print_device_short(dev->parent, indent+1);
3190 indentprintf(("Driver:\n"));
3191 print_driver_short(dev->driver, indent+1);
3192 indentprintf(("Devclass:\n"));
3193 print_devclass_short(dev->devclass, indent+1);
3197 * Print the device and all its children (indented).
3200 print_device_tree_short(device_t dev, int indent)
3207 print_device_short(dev, indent);
3209 TAILQ_FOREACH(child, &dev->children, link)
3210 print_device_tree_short(child, indent+1);
3214 * Print the device and all its children (indented).
3217 print_device_tree(device_t dev, int indent)
3224 print_device(dev, indent);
3226 TAILQ_FOREACH(child, &dev->children, link)
3227 print_device_tree(child, indent+1);
3231 print_driver_short(driver_t *driver, int indent)
3236 indentprintf(("driver %s: softc size = %zu\n",
3237 driver->name, driver->size));
3241 print_driver(driver_t *driver, int indent)
3246 print_driver_short(driver, indent);
3251 print_driver_list(driver_list_t drivers, int indent)
3253 driverlink_t driver;
3255 TAILQ_FOREACH(driver, &drivers, link)
3256 print_driver(driver->driver, indent);
3260 print_devclass_short(devclass_t dc, int indent)
3265 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
3269 print_devclass(devclass_t dc, int indent)
3276 print_devclass_short(dc, indent);
3277 indentprintf(("Drivers:\n"));
3278 print_driver_list(dc->drivers, indent+1);
3280 indentprintf(("Devices:\n"));
3281 for (i = 0; i < dc->maxunit; i++)
3283 print_device(dc->devices[i], indent+1);
3287 print_devclass_list_short(void)
3291 kprintf("Short listing of devclasses, drivers & devices:\n");
3292 TAILQ_FOREACH(dc, &devclasses, link) {
3293 print_devclass_short(dc, 0);
3298 print_devclass_list(void)
3302 kprintf("Full listing of devclasses, drivers & devices:\n");
3303 TAILQ_FOREACH(dc, &devclasses, link) {
3304 print_devclass(dc, 0);
3311 * Check to see if a device is disabled via a disabled hint.
3314 resource_disabled(const char *name, int unit)
3318 error = resource_int_value(name, unit, "disabled", &value);
3325 * User-space access to the device tree.
3327 * We implement a small set of nodes:
3329 * hw.bus Single integer read method to obtain the
3330 * current generation count.
3331 * hw.bus.devices Reads the entire device tree in flat space.
3332 * hw.bus.rman Resource manager interface
3334 * We might like to add the ability to scan devclasses and/or drivers to
3335 * determine what else is currently loaded/available.
3339 sysctl_bus(SYSCTL_HANDLER_ARGS)
3341 struct u_businfo ubus;
3343 ubus.ub_version = BUS_USER_VERSION;
3344 ubus.ub_generation = bus_data_generation;
3346 return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
3348 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
3349 "bus-related data");
3352 sysctl_devices(SYSCTL_HANDLER_ARGS)
3354 int *name = (int *)arg1;
3355 u_int namelen = arg2;
3358 struct u_device udev; /* XXX this is a bit big */
3364 if (bus_data_generation_check(name[0]))
3370 * Scan the list of devices, looking for the requested index.
3372 TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
3380 * Populate the return array.
3382 bzero(&udev, sizeof(udev));
3383 udev.dv_handle = (uintptr_t)dev;
3384 udev.dv_parent = (uintptr_t)dev->parent;
3385 if (dev->nameunit != NULL)
3386 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
3387 if (dev->desc != NULL)
3388 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
3389 if (dev->driver != NULL && dev->driver->name != NULL)
3390 strlcpy(udev.dv_drivername, dev->driver->name,
3391 sizeof(udev.dv_drivername));
3392 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
3393 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
3394 udev.dv_devflags = dev->devflags;
3395 udev.dv_flags = dev->flags;
3396 udev.dv_state = dev->state;
3397 error = SYSCTL_OUT(req, &udev, sizeof(udev));
3401 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
3402 "system device tree");
3405 bus_data_generation_check(int generation)
3407 if (generation != bus_data_generation)
3410 /* XXX generate optimised lists here? */
3415 bus_data_generation_update(void)
3417 bus_data_generation++;
3421 intr_str_polarity(enum intr_polarity pola)
3424 case INTR_POLARITY_LOW:
3427 case INTR_POLARITY_HIGH:
3430 case INTR_POLARITY_CONFORM:
3437 intr_str_trigger(enum intr_trigger trig)
3440 case INTR_TRIGGER_EDGE:
3443 case INTR_TRIGGER_LEVEL:
3446 case INTR_TRIGGER_CONFORM: