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 Delete all children devices of the given device, if any.
1145 * This function deletes all children devices of the given device, if
1146 * any, using the device_delete_child() function for each device it
1147 * finds. If a child device cannot be deleted, this function will
1148 * return an error code.
1150 * @param dev the parent device
1153 * @retval non-zero a device would not detach
1156 device_delete_children(device_t dev)
1161 PDEBUG(("Deleting all children of %s", DEVICENAME(dev)));
1165 while ((child = TAILQ_FIRST(&dev->children)) != NULL) {
1166 error = device_delete_child(dev, child);
1168 PDEBUG(("Failed deleting %s", DEVICENAME(child)));
1176 * @brief Find a device given a unit number
1178 * This is similar to devclass_get_devices() but only searches for
1179 * devices which have @p dev as a parent.
1181 * @param dev the parent device to search
1182 * @param unit the unit number to search for. If the unit is -1,
1183 * return the first child of @p dev which has name
1184 * @p classname (that is, the one with the lowest unit.)
1186 * @returns the device with the given unit number or @c
1187 * NULL if there is no such device
1190 device_find_child(device_t dev, const char *classname, int unit)
1195 dc = devclass_find(classname);
1200 child = devclass_get_device(dc, unit);
1201 if (child && child->parent == dev)
1204 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) {
1205 child = devclass_get_device(dc, unit);
1206 if (child && child->parent == dev)
1214 first_matching_driver(devclass_t dc, device_t dev)
1217 return(devclass_find_driver_internal(dc, dev->devclass->name));
1219 return(TAILQ_FIRST(&dc->drivers));
1223 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
1225 if (dev->devclass) {
1227 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
1228 if (!strcmp(dev->devclass->name, dl->driver->name))
1232 return(TAILQ_NEXT(last, link));
1236 device_probe_child(device_t dev, device_t child)
1239 driverlink_t best = NULL;
1241 int result, pri = 0;
1242 int hasclass = (child->devclass != NULL);
1246 panic("device_probe_child: parent device has no devclass");
1248 if (child->state == DS_ALIVE)
1251 for (; dc; dc = dc->parent) {
1252 for (dl = first_matching_driver(dc, child); dl;
1253 dl = next_matching_driver(dc, child, dl)) {
1254 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1255 device_set_driver(child, dl->driver);
1257 device_set_devclass(child, dl->driver->name);
1258 result = DEVICE_PROBE(child);
1260 device_set_devclass(child, 0);
1263 * If the driver returns SUCCESS, there can be
1264 * no higher match for this device.
1273 * The driver returned an error so it
1274 * certainly doesn't match.
1277 device_set_driver(child, 0);
1282 * A priority lower than SUCCESS, remember the
1283 * best matching driver. Initialise the value
1284 * of pri for the first match.
1286 if (best == NULL || result > pri) {
1293 * If we have unambiguous match in this devclass,
1294 * don't look in the parent.
1296 if (best && pri == 0)
1301 * If we found a driver, change state and initialise the devclass.
1304 if (!child->devclass)
1305 device_set_devclass(child, best->driver->name);
1306 device_set_driver(child, best->driver);
1309 * A bit bogus. Call the probe method again to make
1310 * sure that we have the right description.
1312 DEVICE_PROBE(child);
1315 bus_data_generation_update();
1316 child->state = DS_ALIVE;
1324 device_get_parent(device_t dev)
1330 device_get_children(device_t dev, device_t **devlistp, int *devcountp)
1337 TAILQ_FOREACH(child, &dev->children, link)
1340 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
1345 TAILQ_FOREACH(child, &dev->children, link) {
1346 list[count] = child;
1357 device_get_driver(device_t dev)
1359 return(dev->driver);
1363 device_get_devclass(device_t dev)
1365 return(dev->devclass);
1369 device_get_name(device_t dev)
1372 return devclass_get_name(dev->devclass);
1377 device_get_nameunit(device_t dev)
1379 return(dev->nameunit);
1383 device_get_unit(device_t dev)
1389 device_get_desc(device_t dev)
1395 device_get_flags(device_t dev)
1397 return(dev->devflags);
1401 device_print_prettyname(device_t dev)
1403 const char *name = device_get_name(dev);
1406 return kprintf("unknown: ");
1408 return kprintf("%s%d: ", name, device_get_unit(dev));
1412 device_printf(device_t dev, const char * fmt, ...)
1417 retval = device_print_prettyname(dev);
1418 __va_start(ap, fmt);
1419 retval += kvprintf(fmt, ap);
1425 device_set_desc_internal(device_t dev, const char* desc, int copy)
1427 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
1428 kfree(dev->desc, M_BUS);
1429 dev->flags &= ~DF_DESCMALLOCED;
1434 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
1436 strcpy(dev->desc, desc);
1437 dev->flags |= DF_DESCMALLOCED;
1440 /* Avoid a -Wcast-qual warning */
1441 dev->desc = (char *)(uintptr_t) desc;
1444 bus_data_generation_update();
1448 device_set_desc(device_t dev, const char* desc)
1450 device_set_desc_internal(dev, desc, FALSE);
1454 device_set_desc_copy(device_t dev, const char* desc)
1456 device_set_desc_internal(dev, desc, TRUE);
1460 device_set_flags(device_t dev, uint32_t flags)
1462 dev->devflags = flags;
1466 device_get_softc(device_t dev)
1472 device_set_softc(device_t dev, void *softc)
1474 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
1475 kfree(dev->softc, M_BUS);
1478 dev->flags |= DF_EXTERNALSOFTC;
1480 dev->flags &= ~DF_EXTERNALSOFTC;
1484 device_set_async_attach(device_t dev, int enable)
1487 dev->flags |= DF_ASYNCPROBE;
1489 dev->flags &= ~DF_ASYNCPROBE;
1493 device_get_ivars(device_t dev)
1499 device_set_ivars(device_t dev, void * ivars)
1508 device_get_state(device_t dev)
1514 device_enable(device_t dev)
1516 dev->flags |= DF_ENABLED;
1520 device_disable(device_t dev)
1522 dev->flags &= ~DF_ENABLED;
1529 device_busy(device_t dev)
1531 if (dev->state < DS_ATTACHED)
1532 panic("device_busy: called for unattached device");
1533 if (dev->busy == 0 && dev->parent)
1534 device_busy(dev->parent);
1536 dev->state = DS_BUSY;
1543 device_unbusy(device_t dev)
1545 if (dev->state != DS_BUSY)
1546 panic("device_unbusy: called for non-busy device");
1548 if (dev->busy == 0) {
1550 device_unbusy(dev->parent);
1551 dev->state = DS_ATTACHED;
1556 device_quiet(device_t dev)
1558 dev->flags |= DF_QUIET;
1562 device_verbose(device_t dev)
1564 dev->flags &= ~DF_QUIET;
1568 device_is_quiet(device_t dev)
1570 return((dev->flags & DF_QUIET) != 0);
1574 device_is_enabled(device_t dev)
1576 return((dev->flags & DF_ENABLED) != 0);
1580 device_is_alive(device_t dev)
1582 return(dev->state >= DS_ALIVE);
1586 device_is_attached(device_t dev)
1588 return(dev->state >= DS_ATTACHED);
1592 device_set_devclass(device_t dev, const char *classname)
1599 devclass_delete_device(dev->devclass, dev);
1603 if (dev->devclass) {
1604 kprintf("device_set_devclass: device class already set\n");
1608 dc = devclass_find_internal(classname, NULL, TRUE);
1612 error = devclass_add_device(dc, dev);
1614 bus_data_generation_update();
1619 device_set_driver(device_t dev, driver_t *driver)
1621 if (dev->state >= DS_ATTACHED)
1624 if (dev->driver == driver)
1627 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
1628 kfree(dev->softc, M_BUS);
1631 kobj_delete((kobj_t) dev, 0);
1632 dev->driver = driver;
1634 kobj_init((kobj_t) dev, (kobj_class_t) driver);
1635 if (!(dev->flags & DF_EXTERNALSOFTC)) {
1636 dev->softc = kmalloc(driver->size, M_BUS,
1637 M_INTWAIT | M_ZERO);
1639 kobj_delete((kobj_t)dev, 0);
1640 kobj_init((kobj_t) dev, &null_class);
1646 kobj_init((kobj_t) dev, &null_class);
1649 bus_data_generation_update();
1654 device_probe_and_attach(device_t dev)
1656 device_t bus = dev->parent;
1659 if (dev->state >= DS_ALIVE)
1662 if ((dev->flags & DF_ENABLED) == 0) {
1664 device_print_prettyname(dev);
1665 kprintf("not probed (disabled)\n");
1670 error = device_probe_child(bus, dev);
1672 if (!(dev->flags & DF_DONENOMATCH)) {
1673 BUS_PROBE_NOMATCH(bus, dev);
1675 dev->flags |= DF_DONENOMATCH;
1681 * Output the exact device chain prior to the attach in case the
1682 * system locks up during attach, and generate the full info after
1683 * the attach so correct irq and other information is displayed.
1685 if (bootverbose && !device_is_quiet(dev)) {
1688 kprintf("%s", device_get_nameunit(dev));
1689 for (tmp = dev->parent; tmp; tmp = tmp->parent)
1690 kprintf(".%s", device_get_nameunit(tmp));
1693 if (!device_is_quiet(dev))
1694 device_print_child(bus, dev);
1695 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
1696 kprintf("%s: probing asynchronously\n",
1697 device_get_nameunit(dev));
1698 dev->state = DS_INPROGRESS;
1699 device_attach_async(dev);
1702 error = device_doattach(dev);
1708 * Device is known to be alive, do the attach asynchronously.
1709 * However, serialize the attaches with the mp lock.
1712 device_attach_async(device_t dev)
1716 atomic_add_int(&numasyncthreads, 1);
1717 lwkt_create(device_attach_thread, dev, &td, NULL,
1718 0, 0, "%s", (dev->desc ? dev->desc : "devattach"));
1722 device_attach_thread(void *arg)
1726 get_mplock(); /* XXX replace with devattach_token later */
1727 (void)device_doattach(dev);
1728 atomic_subtract_int(&numasyncthreads, 1);
1729 wakeup(&numasyncthreads);
1730 rel_mplock(); /* XXX replace with devattach_token later */
1734 * Device is known to be alive, do the attach (synchronous or asynchronous)
1737 device_doattach(device_t dev)
1739 device_t bus = dev->parent;
1740 int hasclass = (dev->devclass != NULL);
1743 error = DEVICE_ATTACH(dev);
1745 dev->state = DS_ATTACHED;
1746 if (bootverbose && !device_is_quiet(dev))
1747 device_print_child(bus, dev);
1750 kprintf("device_probe_and_attach: %s%d attach returned %d\n",
1751 dev->driver->name, dev->unit, error);
1752 /* Unset the class that was set in device_probe_child */
1754 device_set_devclass(dev, 0);
1755 device_set_driver(dev, NULL);
1756 dev->state = DS_NOTPRESENT;
1762 device_detach(device_t dev)
1766 PDEBUG(("%s", DEVICENAME(dev)));
1767 if (dev->state == DS_BUSY)
1769 if (dev->state != DS_ATTACHED)
1772 if ((error = DEVICE_DETACH(dev)) != 0)
1775 device_printf(dev, "detached\n");
1777 BUS_CHILD_DETACHED(dev->parent, dev);
1779 if (!(dev->flags & DF_FIXEDCLASS))
1780 devclass_delete_device(dev->devclass, dev);
1782 dev->state = DS_NOTPRESENT;
1783 device_set_driver(dev, NULL);
1789 device_shutdown(device_t dev)
1791 if (dev->state < DS_ATTACHED)
1793 PDEBUG(("%s", DEVICENAME(dev)));
1794 return DEVICE_SHUTDOWN(dev);
1798 device_set_unit(device_t dev, int unit)
1803 dc = device_get_devclass(dev);
1804 if (unit < dc->maxunit && dc->devices[unit])
1806 err = devclass_delete_device(dc, dev);
1810 err = devclass_add_device(dc, dev);
1814 bus_data_generation_update();
1818 /*======================================*/
1820 * Access functions for device resources.
1823 /* Supplied by config(8) in ioconf.c */
1824 extern struct config_device config_devtab[];
1825 extern int devtab_count;
1827 /* Runtime version */
1828 struct config_device *devtab = config_devtab;
1831 resource_new_name(const char *name, int unit)
1833 struct config_device *new;
1835 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP,
1836 M_INTWAIT | M_ZERO);
1839 if (devtab && devtab_count > 0)
1840 bcopy(devtab, new, devtab_count * sizeof(*new));
1841 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
1842 if (new[devtab_count].name == NULL) {
1846 strcpy(new[devtab_count].name, name);
1847 new[devtab_count].unit = unit;
1848 new[devtab_count].resource_count = 0;
1849 new[devtab_count].resources = NULL;
1850 if (devtab && devtab != config_devtab)
1851 kfree(devtab, M_TEMP);
1853 return devtab_count++;
1857 resource_new_resname(int j, const char *resname, resource_type type)
1859 struct config_resource *new;
1862 i = devtab[j].resource_count;
1863 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
1866 if (devtab[j].resources && i > 0)
1867 bcopy(devtab[j].resources, new, i * sizeof(*new));
1868 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
1869 if (new[i].name == NULL) {
1873 strcpy(new[i].name, resname);
1875 if (devtab[j].resources)
1876 kfree(devtab[j].resources, M_TEMP);
1877 devtab[j].resources = new;
1878 devtab[j].resource_count = i + 1;
1883 resource_match_string(int i, const char *resname, const char *value)
1886 struct config_resource *res;
1888 for (j = 0, res = devtab[i].resources;
1889 j < devtab[i].resource_count; j++, res++)
1890 if (!strcmp(res->name, resname)
1891 && res->type == RES_STRING
1892 && !strcmp(res->u.stringval, value))
1898 resource_find(const char *name, int unit, const char *resname,
1899 struct config_resource **result)
1902 struct config_resource *res;
1905 * First check specific instances, then generic.
1907 for (i = 0; i < devtab_count; i++) {
1908 if (devtab[i].unit < 0)
1910 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1911 res = devtab[i].resources;
1912 for (j = 0; j < devtab[i].resource_count; j++, res++)
1913 if (!strcmp(res->name, resname)) {
1919 for (i = 0; i < devtab_count; i++) {
1920 if (devtab[i].unit >= 0)
1922 /* XXX should this `&& devtab[i].unit == unit' be here? */
1923 /* XXX if so, then the generic match does nothing */
1924 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1925 res = devtab[i].resources;
1926 for (j = 0; j < devtab[i].resource_count; j++, res++)
1927 if (!strcmp(res->name, resname)) {
1937 resource_kenv(const char *name, int unit, const char *resname, long *result)
1942 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname);
1943 if ((env = kgetenv(buf)) != NULL) {
1944 *result = strtol(env, NULL, 0);
1951 resource_int_value(const char *name, int unit, const char *resname, int *result)
1953 struct config_resource *res;
1957 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
1958 *result = (int)kvalue;
1961 if ((error = resource_find(name, unit, resname, &res)) != 0)
1963 if (res->type != RES_INT)
1965 *result = res->u.intval;
1970 resource_long_value(const char *name, int unit, const char *resname,
1973 struct config_resource *res;
1977 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
1981 if ((error = resource_find(name, unit, resname, &res)) != 0)
1983 if (res->type != RES_LONG)
1985 *result = res->u.longval;
1990 resource_string_value(const char *name, int unit, const char *resname,
1994 struct config_resource *res;
1996 if ((error = resource_find(name, unit, resname, &res)) != 0)
1998 if (res->type != RES_STRING)
2000 *result = res->u.stringval;
2005 resource_query_string(int i, const char *resname, const char *value)
2011 for (; i < devtab_count; i++)
2012 if (resource_match_string(i, resname, value) >= 0)
2018 resource_locate(int i, const char *resname)
2024 for (; i < devtab_count; i++)
2025 if (!strcmp(devtab[i].name, resname))
2031 resource_count(void)
2033 return(devtab_count);
2037 resource_query_name(int i)
2039 return(devtab[i].name);
2043 resource_query_unit(int i)
2045 return(devtab[i].unit);
2049 resource_create(const char *name, int unit, const char *resname,
2050 resource_type type, struct config_resource **result)
2053 struct config_resource *res = NULL;
2055 for (i = 0; i < devtab_count; i++)
2056 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2057 res = devtab[i].resources;
2061 i = resource_new_name(name, unit);
2064 res = devtab[i].resources;
2066 for (j = 0; j < devtab[i].resource_count; j++, res++)
2067 if (!strcmp(res->name, resname)) {
2071 j = resource_new_resname(i, resname, type);
2074 res = &devtab[i].resources[j];
2080 resource_set_int(const char *name, int unit, const char *resname, int value)
2083 struct config_resource *res;
2085 error = resource_create(name, unit, resname, RES_INT, &res);
2088 if (res->type != RES_INT)
2090 res->u.intval = value;
2095 resource_set_long(const char *name, int unit, const char *resname, long value)
2098 struct config_resource *res;
2100 error = resource_create(name, unit, resname, RES_LONG, &res);
2103 if (res->type != RES_LONG)
2105 res->u.longval = value;
2110 resource_set_string(const char *name, int unit, const char *resname,
2114 struct config_resource *res;
2116 error = resource_create(name, unit, resname, RES_STRING, &res);
2119 if (res->type != RES_STRING)
2121 if (res->u.stringval)
2122 kfree(res->u.stringval, M_TEMP);
2123 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
2124 if (res->u.stringval == NULL)
2126 strcpy(res->u.stringval, value);
2131 resource_cfgload(void *dummy __unused)
2133 struct config_resource *res, *cfgres;
2136 char *name, *resname;
2140 int config_devtab_count;
2142 config_devtab_count = devtab_count;
2146 for (i = 0; i < config_devtab_count; i++) {
2147 name = config_devtab[i].name;
2148 unit = config_devtab[i].unit;
2150 for (j = 0; j < config_devtab[i].resource_count; j++) {
2151 cfgres = config_devtab[i].resources;
2152 resname = cfgres[j].name;
2153 type = cfgres[j].type;
2154 error = resource_create(name, unit, resname, type,
2157 kprintf("create resource %s%d: error %d\n",
2161 if (res->type != type) {
2162 kprintf("type mismatch %s%d: %d != %d\n",
2163 name, unit, res->type, type);
2168 res->u.intval = cfgres[j].u.intval;
2171 res->u.longval = cfgres[j].u.longval;
2174 if (res->u.stringval)
2175 kfree(res->u.stringval, M_TEMP);
2176 stringval = cfgres[j].u.stringval;
2177 res->u.stringval = kmalloc(strlen(stringval) + 1,
2179 if (res->u.stringval == NULL)
2181 strcpy(res->u.stringval, stringval);
2184 panic("unknown resource type %d", type);
2189 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0)
2192 /*======================================*/
2194 * Some useful method implementations to make life easier for bus drivers.
2198 resource_list_init(struct resource_list *rl)
2204 resource_list_free(struct resource_list *rl)
2206 struct resource_list_entry *rle;
2208 while ((rle = SLIST_FIRST(rl)) != NULL) {
2210 panic("resource_list_free: resource entry is busy");
2211 SLIST_REMOVE_HEAD(rl, link);
2217 resource_list_add(struct resource_list *rl, int type, int rid,
2218 u_long start, u_long end, u_long count, int cpuid)
2220 struct resource_list_entry *rle;
2222 rle = resource_list_find(rl, type, rid);
2224 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS,
2227 panic("resource_list_add: can't record entry");
2228 SLIST_INSERT_HEAD(rl, rle, link);
2236 panic("resource_list_add: resource entry is busy");
2243 if (rle->cpuid != -1 && rle->cpuid != cpuid) {
2244 panic("resource_list_add: moving from cpu%d -> cpu%d",
2251 struct resource_list_entry*
2252 resource_list_find(struct resource_list *rl,
2255 struct resource_list_entry *rle;
2257 SLIST_FOREACH(rle, rl, link)
2258 if (rle->type == type && rle->rid == rid)
2264 resource_list_delete(struct resource_list *rl,
2267 struct resource_list_entry *rle = resource_list_find(rl, type, rid);
2270 if (rle->res != NULL)
2271 panic("resource_list_delete: resource has not been released");
2272 SLIST_REMOVE(rl, rle, resource_list_entry, link);
2278 resource_list_alloc(struct resource_list *rl,
2279 device_t bus, device_t child,
2281 u_long start, u_long end,
2282 u_long count, u_int flags, int cpuid)
2284 struct resource_list_entry *rle = NULL;
2285 int passthrough = (device_get_parent(child) != bus);
2286 int isdefault = (start == 0UL && end == ~0UL);
2289 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2291 start, end, count, flags, cpuid));
2294 rle = resource_list_find(rl, type, *rid);
2297 return(0); /* no resource of that type/rid */
2300 panic("resource_list_alloc: resource entry is busy");
2304 count = max(count, rle->count);
2305 end = max(rle->end, start + count - 1);
2309 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2310 type, rid, start, end, count,
2314 * Record the new range.
2317 rle->start = rman_get_start(rle->res);
2318 rle->end = rman_get_end(rle->res);
2326 resource_list_release(struct resource_list *rl,
2327 device_t bus, device_t child,
2328 int type, int rid, struct resource *res)
2330 struct resource_list_entry *rle = NULL;
2331 int passthrough = (device_get_parent(child) != bus);
2335 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2339 rle = resource_list_find(rl, type, rid);
2342 panic("resource_list_release: can't find resource");
2344 panic("resource_list_release: resource entry is not busy");
2346 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2356 resource_list_print_type(struct resource_list *rl, const char *name, int type,
2359 struct resource_list_entry *rle;
2360 int printed, retval;
2364 /* Yes, this is kinda cheating */
2365 SLIST_FOREACH(rle, rl, link) {
2366 if (rle->type == type) {
2368 retval += kprintf(" %s ", name);
2370 retval += kprintf(",");
2372 retval += kprintf(format, rle->start);
2373 if (rle->count > 1) {
2374 retval += kprintf("-");
2375 retval += kprintf(format, rle->start +
2384 * Generic driver/device identify functions. These will install a device
2385 * rendezvous point under the parent using the same name as the driver
2386 * name, which will at a later time be probed and attached.
2388 * These functions are used when the parent does not 'scan' its bus for
2389 * matching devices, or for the particular devices using these functions,
2390 * or when the device is a pseudo or synthesized device (such as can be
2391 * found under firewire and ppbus).
2394 bus_generic_identify(driver_t *driver, device_t parent)
2396 if (parent->state == DS_ATTACHED)
2398 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1);
2403 bus_generic_identify_sameunit(driver_t *driver, device_t parent)
2405 if (parent->state == DS_ATTACHED)
2407 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent));
2412 * Call DEVICE_IDENTIFY for each driver.
2415 bus_generic_probe(device_t dev)
2417 devclass_t dc = dev->devclass;
2420 TAILQ_FOREACH(dl, &dc->drivers, link) {
2421 DEVICE_IDENTIFY(dl->driver, dev);
2428 * This is an aweful hack due to the isa bus and autoconf code not
2429 * probing the ISA devices until after everything else has configured.
2430 * The ISA bus did a dummy attach long ago so we have to set it back
2431 * to an earlier state so the probe thinks its the initial probe and
2434 * XXX remove by properly defering the ISA bus scan.
2437 bus_generic_probe_hack(device_t dev)
2439 if (dev->state == DS_ATTACHED) {
2440 dev->state = DS_ALIVE;
2441 bus_generic_probe(dev);
2442 dev->state = DS_ATTACHED;
2448 bus_generic_attach(device_t dev)
2452 TAILQ_FOREACH(child, &dev->children, link) {
2453 device_probe_and_attach(child);
2460 bus_generic_detach(device_t dev)
2465 if (dev->state != DS_ATTACHED)
2468 TAILQ_FOREACH(child, &dev->children, link)
2469 if ((error = device_detach(child)) != 0)
2476 bus_generic_shutdown(device_t dev)
2480 TAILQ_FOREACH(child, &dev->children, link)
2481 device_shutdown(child);
2487 bus_generic_suspend(device_t dev)
2490 device_t child, child2;
2492 TAILQ_FOREACH(child, &dev->children, link) {
2493 error = DEVICE_SUSPEND(child);
2495 for (child2 = TAILQ_FIRST(&dev->children);
2496 child2 && child2 != child;
2497 child2 = TAILQ_NEXT(child2, link))
2498 DEVICE_RESUME(child2);
2506 bus_generic_resume(device_t dev)
2510 TAILQ_FOREACH(child, &dev->children, link)
2511 DEVICE_RESUME(child);
2512 /* if resume fails, there's nothing we can usefully do... */
2518 bus_print_child_header(device_t dev, device_t child)
2522 if (device_get_desc(child))
2523 retval += device_printf(child, "<%s>", device_get_desc(child));
2525 retval += kprintf("%s", device_get_nameunit(child));
2527 if (child->state != DS_ATTACHED)
2528 kprintf(" [tentative]");
2530 kprintf(" [attached!]");
2536 bus_print_child_footer(device_t dev, device_t child)
2538 return(kprintf(" on %s\n", device_get_nameunit(dev)));
2542 bus_generic_add_child(device_t dev, device_t child, int order,
2543 const char *name, int unit)
2546 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit);
2548 dev = device_add_child_ordered(child, order, name, unit);
2554 bus_generic_print_child(device_t dev, device_t child)
2558 retval += bus_print_child_header(dev, child);
2559 retval += bus_print_child_footer(dev, child);
2565 bus_generic_read_ivar(device_t dev, device_t child, int index,
2571 error = BUS_READ_IVAR(dev->parent, child, index, result);
2578 bus_generic_write_ivar(device_t dev, device_t child, int index,
2584 error = BUS_WRITE_IVAR(dev->parent, child, index, value);
2591 * Resource list are used for iterations, do not recurse.
2593 struct resource_list *
2594 bus_generic_get_resource_list(device_t dev, device_t child)
2600 bus_generic_driver_added(device_t dev, driver_t *driver)
2604 DEVICE_IDENTIFY(driver, dev);
2605 TAILQ_FOREACH(child, &dev->children, link) {
2606 if (child->state == DS_NOTPRESENT)
2607 device_probe_and_attach(child);
2612 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
2613 int flags, driver_intr_t *intr, void *arg, void **cookiep,
2614 lwkt_serialize_t serializer, const char *desc)
2616 /* Propagate up the bus hierarchy until someone handles it. */
2618 return BUS_SETUP_INTR(dev->parent, child, irq, flags,
2619 intr, arg, cookiep, serializer, desc);
2626 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
2629 /* Propagate up the bus hierarchy until someone handles it. */
2631 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
2637 bus_generic_disable_intr(device_t dev, device_t child, void *cookie)
2640 return(BUS_DISABLE_INTR(dev->parent, child, cookie));
2646 bus_generic_enable_intr(device_t dev, device_t child, void *cookie)
2649 BUS_ENABLE_INTR(dev->parent, child, cookie);
2653 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
2654 enum intr_polarity pol)
2656 /* Propagate up the bus hierarchy until someone handles it. */
2658 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol));
2664 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
2665 u_long start, u_long end, u_long count, u_int flags, int cpuid)
2667 /* Propagate up the bus hierarchy until someone handles it. */
2669 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
2670 start, end, count, flags, cpuid));
2676 bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
2679 /* Propagate up the bus hierarchy until someone handles it. */
2681 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
2687 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
2690 /* Propagate up the bus hierarchy until someone handles it. */
2692 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
2698 bus_generic_deactivate_resource(device_t dev, device_t child, int type,
2699 int rid, struct resource *r)
2701 /* Propagate up the bus hierarchy until someone handles it. */
2703 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
2710 bus_generic_get_resource(device_t dev, device_t child, int type, int rid,
2711 u_long *startp, u_long *countp)
2717 error = BUS_GET_RESOURCE(dev->parent, child, type, rid,
2724 bus_generic_set_resource(device_t dev, device_t child, int type, int rid,
2725 u_long start, u_long count, int cpuid)
2731 error = BUS_SET_RESOURCE(dev->parent, child, type, rid,
2732 start, count, cpuid);
2738 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid)
2741 BUS_DELETE_RESOURCE(dev, child, type, rid);
2745 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
2746 u_long *startp, u_long *countp)
2748 struct resource_list *rl = NULL;
2749 struct resource_list_entry *rle = NULL;
2751 rl = BUS_GET_RESOURCE_LIST(dev, child);
2755 rle = resource_list_find(rl, type, rid);
2760 *startp = rle->start;
2762 *countp = rle->count;
2768 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
2769 u_long start, u_long count, int cpuid)
2771 struct resource_list *rl = NULL;
2773 rl = BUS_GET_RESOURCE_LIST(dev, child);
2777 resource_list_add(rl, type, rid, start, (start + count - 1), count,
2784 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
2786 struct resource_list *rl = NULL;
2788 rl = BUS_GET_RESOURCE_LIST(dev, child);
2792 resource_list_delete(rl, type, rid);
2796 bus_generic_rl_release_resource(device_t dev, device_t child, int type,
2797 int rid, struct resource *r)
2799 struct resource_list *rl = NULL;
2801 rl = BUS_GET_RESOURCE_LIST(dev, child);
2805 return(resource_list_release(rl, dev, child, type, rid, r));
2809 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
2810 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid)
2812 struct resource_list *rl = NULL;
2814 rl = BUS_GET_RESOURCE_LIST(dev, child);
2818 return(resource_list_alloc(rl, dev, child, type, rid,
2819 start, end, count, flags, cpuid));
2823 bus_generic_child_present(device_t bus, device_t child)
2825 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
2830 * Some convenience functions to make it easier for drivers to use the
2831 * resource-management functions. All these really do is hide the
2832 * indirection through the parent's method table, making for slightly
2833 * less-wordy code. In the future, it might make sense for this code
2834 * to maintain some sort of a list of resources allocated by each device.
2837 bus_alloc_resources(device_t dev, struct resource_spec *rs,
2838 struct resource **res)
2842 for (i = 0; rs[i].type != -1; i++)
2844 for (i = 0; rs[i].type != -1; i++) {
2845 res[i] = bus_alloc_resource_any(dev,
2846 rs[i].type, &rs[i].rid, rs[i].flags);
2847 if (res[i] == NULL) {
2848 bus_release_resources(dev, rs, res);
2856 bus_release_resources(device_t dev, const struct resource_spec *rs,
2857 struct resource **res)
2861 for (i = 0; rs[i].type != -1; i++)
2862 if (res[i] != NULL) {
2863 bus_release_resource(
2864 dev, rs[i].type, rs[i].rid, res[i]);
2870 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
2871 u_long count, u_int flags)
2873 if (dev->parent == NULL)
2875 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
2880 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags)
2882 if (dev->parent == NULL)
2884 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid,
2885 irq, irq, 1, flags, machintr_legacy_intr_cpuid(irq));
2889 bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
2891 if (dev->parent == NULL)
2893 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2897 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
2899 if (dev->parent == NULL)
2901 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2905 bus_release_resource(device_t dev, int type, int rid, struct resource *r)
2907 if (dev->parent == NULL)
2909 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
2913 bus_setup_intr_descr(device_t dev, struct resource *r, int flags,
2914 driver_intr_t handler, void *arg, void **cookiep,
2915 lwkt_serialize_t serializer, const char *desc)
2917 if (dev->parent == NULL)
2919 return BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
2920 cookiep, serializer, desc);
2924 bus_setup_intr(device_t dev, struct resource *r, int flags,
2925 driver_intr_t handler, void *arg, void **cookiep,
2926 lwkt_serialize_t serializer)
2928 return bus_setup_intr_descr(dev, r, flags, handler, arg, cookiep,
2933 bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
2935 if (dev->parent == NULL)
2937 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
2941 bus_enable_intr(device_t dev, void *cookie)
2944 BUS_ENABLE_INTR(dev->parent, dev, cookie);
2948 bus_disable_intr(device_t dev, void *cookie)
2951 return(BUS_DISABLE_INTR(dev->parent, dev, cookie));
2957 bus_set_resource(device_t dev, int type, int rid,
2958 u_long start, u_long count, int cpuid)
2960 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
2961 start, count, cpuid));
2965 bus_get_resource(device_t dev, int type, int rid,
2966 u_long *startp, u_long *countp)
2968 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2973 bus_get_resource_start(device_t dev, int type, int rid)
2975 u_long start, count;
2978 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2986 bus_get_resource_count(device_t dev, int type, int rid)
2988 u_long start, count;
2991 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2999 bus_delete_resource(device_t dev, int type, int rid)
3001 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
3005 bus_child_present(device_t child)
3007 return (BUS_CHILD_PRESENT(device_get_parent(child), child));
3011 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
3015 parent = device_get_parent(child);
3016 if (parent == NULL) {
3020 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
3024 bus_child_location_str(device_t child, char *buf, size_t buflen)
3028 parent = device_get_parent(child);
3029 if (parent == NULL) {
3033 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
3037 root_print_child(device_t dev, device_t child)
3043 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
3044 void **cookiep, lwkt_serialize_t serializer, const char *desc)
3047 * If an interrupt mapping gets to here something bad has happened.
3049 panic("root_setup_intr");
3053 * If we get here, assume that the device is permanant and really is
3054 * present in the system. Removable bus drivers are expected to intercept
3055 * this call long before it gets here. We return -1 so that drivers that
3056 * really care can check vs -1 or some ERRNO returned higher in the food
3060 root_child_present(device_t dev, device_t child)
3066 * XXX NOTE! other defaults may be set in bus_if.m
3068 static kobj_method_t root_methods[] = {
3069 /* Device interface */
3070 KOBJMETHOD(device_shutdown, bus_generic_shutdown),
3071 KOBJMETHOD(device_suspend, bus_generic_suspend),
3072 KOBJMETHOD(device_resume, bus_generic_resume),
3075 KOBJMETHOD(bus_add_child, bus_generic_add_child),
3076 KOBJMETHOD(bus_print_child, root_print_child),
3077 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
3078 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
3079 KOBJMETHOD(bus_setup_intr, root_setup_intr),
3080 KOBJMETHOD(bus_child_present, root_child_present),
3085 static driver_t root_driver = {
3092 devclass_t root_devclass;
3095 root_bus_module_handler(module_t mod, int what, void* arg)
3099 TAILQ_INIT(&bus_data_devices);
3100 root_bus = make_device(NULL, "root", 0);
3101 root_bus->desc = "System root bus";
3102 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
3103 root_bus->driver = &root_driver;
3104 root_bus->state = DS_ALIVE;
3105 root_devclass = devclass_find_internal("root", NULL, FALSE);
3110 device_shutdown(root_bus);
3117 static moduledata_t root_bus_mod = {
3119 root_bus_module_handler,
3122 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
3125 root_bus_configure(void)
3133 * handle device_identify based device attachments to the root_bus
3134 * (typically nexus).
3136 bus_generic_probe(root_bus);
3139 * Probe and attach the devices under root_bus.
3141 TAILQ_FOREACH(dev, &root_bus->children, link) {
3142 device_probe_and_attach(dev);
3146 * Wait for all asynchronous attaches to complete. If we don't
3147 * our legacy ISA bus scan could steal device unit numbers or
3151 if (numasyncthreads)
3152 kprintf("Waiting for async drivers to attach\n");
3153 while (numasyncthreads > 0) {
3154 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK)
3156 if (warncount == 0) {
3157 kprintf("Warning: Still waiting for %d "
3158 "drivers to attach\n", numasyncthreads);
3159 } else if (warncount == -30) {
3160 kprintf("Giving up on %d drivers\n", numasyncthreads);
3164 root_bus->state = DS_ATTACHED;
3168 driver_module_handler(module_t mod, int what, void *arg)
3171 struct driver_module_data *dmd;
3172 devclass_t bus_devclass;
3173 kobj_class_t driver;
3174 const char *parentname;
3176 dmd = (struct driver_module_data *)arg;
3177 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
3182 if (dmd->dmd_chainevh)
3183 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3185 driver = dmd->dmd_driver;
3186 PDEBUG(("Loading module: driver %s on bus %s",
3187 DRIVERNAME(driver), dmd->dmd_busname));
3190 * If the driver has any base classes, make the
3191 * devclass inherit from the devclass of the driver's
3192 * first base class. This will allow the system to
3193 * search for drivers in both devclasses for children
3194 * of a device using this driver.
3196 if (driver->baseclasses)
3197 parentname = driver->baseclasses[0]->name;
3200 *dmd->dmd_devclass = devclass_find_internal(driver->name,
3203 error = devclass_add_driver(bus_devclass, driver);
3209 PDEBUG(("Unloading module: driver %s from bus %s",
3210 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
3211 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
3213 if (!error && dmd->dmd_chainevh)
3214 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3224 * The _short versions avoid iteration by not calling anything that prints
3225 * more than oneliners. I love oneliners.
3229 print_device_short(device_t dev, int indent)
3234 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
3235 dev->unit, dev->desc,
3236 (dev->parent? "":"no "),
3237 (TAILQ_EMPTY(&dev->children)? "no ":""),
3238 (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
3239 (dev->flags&DF_FIXEDCLASS? "fixed,":""),
3240 (dev->flags&DF_WILDCARD? "wildcard,":""),
3241 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
3242 (dev->ivars? "":"no "),
3243 (dev->softc? "":"no "),
3248 print_device(device_t dev, int indent)
3253 print_device_short(dev, indent);
3255 indentprintf(("Parent:\n"));
3256 print_device_short(dev->parent, indent+1);
3257 indentprintf(("Driver:\n"));
3258 print_driver_short(dev->driver, indent+1);
3259 indentprintf(("Devclass:\n"));
3260 print_devclass_short(dev->devclass, indent+1);
3264 * Print the device and all its children (indented).
3267 print_device_tree_short(device_t dev, int indent)
3274 print_device_short(dev, indent);
3276 TAILQ_FOREACH(child, &dev->children, link)
3277 print_device_tree_short(child, indent+1);
3281 * Print the device and all its children (indented).
3284 print_device_tree(device_t dev, int indent)
3291 print_device(dev, indent);
3293 TAILQ_FOREACH(child, &dev->children, link)
3294 print_device_tree(child, indent+1);
3298 print_driver_short(driver_t *driver, int indent)
3303 indentprintf(("driver %s: softc size = %zu\n",
3304 driver->name, driver->size));
3308 print_driver(driver_t *driver, int indent)
3313 print_driver_short(driver, indent);
3318 print_driver_list(driver_list_t drivers, int indent)
3320 driverlink_t driver;
3322 TAILQ_FOREACH(driver, &drivers, link)
3323 print_driver(driver->driver, indent);
3327 print_devclass_short(devclass_t dc, int indent)
3332 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
3336 print_devclass(devclass_t dc, int indent)
3343 print_devclass_short(dc, indent);
3344 indentprintf(("Drivers:\n"));
3345 print_driver_list(dc->drivers, indent+1);
3347 indentprintf(("Devices:\n"));
3348 for (i = 0; i < dc->maxunit; i++)
3350 print_device(dc->devices[i], indent+1);
3354 print_devclass_list_short(void)
3358 kprintf("Short listing of devclasses, drivers & devices:\n");
3359 TAILQ_FOREACH(dc, &devclasses, link) {
3360 print_devclass_short(dc, 0);
3365 print_devclass_list(void)
3369 kprintf("Full listing of devclasses, drivers & devices:\n");
3370 TAILQ_FOREACH(dc, &devclasses, link) {
3371 print_devclass(dc, 0);
3378 * Check to see if a device is disabled via a disabled hint.
3381 resource_disabled(const char *name, int unit)
3385 error = resource_int_value(name, unit, "disabled", &value);
3392 * User-space access to the device tree.
3394 * We implement a small set of nodes:
3396 * hw.bus Single integer read method to obtain the
3397 * current generation count.
3398 * hw.bus.devices Reads the entire device tree in flat space.
3399 * hw.bus.rman Resource manager interface
3401 * We might like to add the ability to scan devclasses and/or drivers to
3402 * determine what else is currently loaded/available.
3406 sysctl_bus(SYSCTL_HANDLER_ARGS)
3408 struct u_businfo ubus;
3410 ubus.ub_version = BUS_USER_VERSION;
3411 ubus.ub_generation = bus_data_generation;
3413 return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
3415 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
3416 "bus-related data");
3419 sysctl_devices(SYSCTL_HANDLER_ARGS)
3421 int *name = (int *)arg1;
3422 u_int namelen = arg2;
3425 struct u_device udev; /* XXX this is a bit big */
3431 if (bus_data_generation_check(name[0]))
3437 * Scan the list of devices, looking for the requested index.
3439 TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
3447 * Populate the return array.
3449 bzero(&udev, sizeof(udev));
3450 udev.dv_handle = (uintptr_t)dev;
3451 udev.dv_parent = (uintptr_t)dev->parent;
3452 if (dev->nameunit != NULL)
3453 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
3454 if (dev->desc != NULL)
3455 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
3456 if (dev->driver != NULL && dev->driver->name != NULL)
3457 strlcpy(udev.dv_drivername, dev->driver->name,
3458 sizeof(udev.dv_drivername));
3459 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
3460 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
3461 udev.dv_devflags = dev->devflags;
3462 udev.dv_flags = dev->flags;
3463 udev.dv_state = dev->state;
3464 error = SYSCTL_OUT(req, &udev, sizeof(udev));
3468 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
3469 "system device tree");
3472 bus_data_generation_check(int generation)
3474 if (generation != bus_data_generation)
3477 /* XXX generate optimised lists here? */
3482 bus_data_generation_update(void)
3484 bus_data_generation++;
3488 intr_str_polarity(enum intr_polarity pola)
3491 case INTR_POLARITY_LOW:
3494 case INTR_POLARITY_HIGH:
3497 case INTR_POLARITY_CONFORM:
3504 intr_str_trigger(enum intr_trigger trig)
3507 case INTR_TRIGGER_EDGE:
3510 case INTR_TRIGGER_LEVEL:
3513 case INTR_TRIGGER_CONFORM:
3520 device_getenv_int(device_t dev, const char *knob, int def)
3524 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob);
3525 kgetenv_int(env, &def);