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 KNOTE(&devsoftc.kq.ki_note, 0);
363 p = devsoftc.async_proc;
369 * @brief Send a 'notification' to userland, using standard ways
372 devctl_notify(const char *system, const char *subsystem, const char *type,
379 return; /* BOGUS! Must specify system. */
380 if (subsystem == NULL)
381 return; /* BOGUS! Must specify subsystem. */
383 return; /* BOGUS! Must specify type. */
384 len += strlen(" system=") + strlen(system);
385 len += strlen(" subsystem=") + strlen(subsystem);
386 len += strlen(" type=") + strlen(type);
387 /* add in the data message plus newline. */
390 len += 3; /* '!', '\n', and NUL */
391 msg = kmalloc(len, M_BUS, M_NOWAIT);
393 return; /* Drop it on the floor */
395 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n",
396 system, subsystem, type, data);
398 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n",
399 system, subsystem, type);
400 devctl_queue_data(msg);
404 * Common routine that tries to make sending messages as easy as possible.
405 * We allocate memory for the data, copy strings into that, but do not
406 * free it unless there's an error. The dequeue part of the driver should
407 * free the data. We don't send data when the device is disabled. We do
408 * send data, even when we have no listeners, because we wish to avoid
409 * races relating to startup and restart of listening applications.
411 * devaddq is designed to string together the type of event, with the
412 * object of that event, plus the plug and play info and location info
413 * for that event. This is likely most useful for devices, but less
414 * useful for other consumers of this interface. Those should use
415 * the devctl_queue_data() interface instead.
418 devaddq(const char *type, const char *what, device_t dev)
427 data = kmalloc(1024, M_BUS, M_NOWAIT);
431 /* get the bus specific location of this device */
432 loc = kmalloc(1024, M_BUS, M_NOWAIT);
436 bus_child_location_str(dev, loc, 1024);
438 /* Get the bus specific pnp info of this device */
439 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
443 bus_child_pnpinfo_str(dev, pnp, 1024);
445 /* Get the parent of this device, or / if high enough in the tree. */
446 if (device_get_parent(dev) == NULL)
447 parstr = "."; /* Or '/' ? */
449 parstr = device_get_nameunit(device_get_parent(dev));
450 /* String it all together. */
451 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp,
455 devctl_queue_data(data);
465 * A device was added to the tree. We are called just after it successfully
466 * attaches (that is, probe and attach success for this device). No call
467 * is made if a device is merely parented into the tree. See devnomatch
468 * if probe fails. If attach fails, no notification is sent (but maybe
469 * we should have a different message for this).
472 devadded(device_t dev)
477 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
480 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
484 bus_child_pnpinfo_str(dev, pnp, 1024);
485 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
486 devaddq("+", tmp, dev);
496 * A device was removed from the tree. We are called just before this
500 devremoved(device_t dev)
505 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
508 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
512 bus_child_pnpinfo_str(dev, pnp, 1024);
513 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
514 devaddq("-", tmp, dev);
524 * Called when there's no match for this device. This is only called
525 * the first time that no match happens, so we don't keep getitng this
526 * message. Should that prove to be undesirable, we can change it.
527 * This is called when all drivers that can attach to a given bus
528 * decline to accept this device. Other errrors may not be detected.
531 devnomatch(device_t dev)
533 devaddq("?", "", dev);
537 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS)
539 struct dev_event_info *n1;
542 dis = devctl_disable;
543 error = sysctl_handle_int(oidp, &dis, 0, req);
544 if (error || !req->newptr)
546 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
547 devctl_disable = dis;
549 while (!TAILQ_EMPTY(&devsoftc.devq)) {
550 n1 = TAILQ_FIRST(&devsoftc.devq);
551 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
552 kfree(n1->dei_data, M_BUS);
556 lockmgr(&devsoftc.lock, LK_RELEASE);
560 /* End of /dev/devctl code */
562 TAILQ_HEAD(,device) bus_data_devices;
563 static int bus_data_generation = 1;
565 kobj_method_t null_methods[] = {
569 DEFINE_CLASS(null, null_methods, 0);
572 * Devclass implementation
575 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
578 devclass_find_internal(const char *classname, const char *parentname,
583 PDEBUG(("looking for %s", classname));
584 if (classname == NULL)
587 TAILQ_FOREACH(dc, &devclasses, link)
588 if (!strcmp(dc->name, classname))
592 PDEBUG(("creating %s", classname));
593 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1,
594 M_BUS, M_INTWAIT | M_ZERO);
596 dc->name = (char*) (dc + 1);
597 strcpy(dc->name, classname);
600 TAILQ_INIT(&dc->drivers);
601 TAILQ_INSERT_TAIL(&devclasses, dc, link);
603 bus_data_generation_update();
608 * If a parent class is specified, then set that as our parent so
609 * that this devclass will support drivers for the parent class as
610 * well. If the parent class has the same name don't do this though
611 * as it creates a cycle that can trigger an infinite loop in
612 * device_probe_child() if a device exists for which there is no
615 if (parentname && dc && !dc->parent &&
616 strcmp(classname, parentname) != 0)
617 dc->parent = devclass_find_internal(parentname, NULL, FALSE);
623 devclass_create(const char *classname)
625 return(devclass_find_internal(classname, NULL, TRUE));
629 devclass_find(const char *classname)
631 return(devclass_find_internal(classname, NULL, FALSE));
635 devclass_find_unit(const char *classname, int unit)
639 if ((dc = devclass_find(classname)) != NULL)
640 return(devclass_get_device(dc, unit));
645 devclass_add_driver(devclass_t dc, driver_t *driver)
651 PDEBUG(("%s", DRIVERNAME(driver)));
653 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
656 * Compile the driver's methods. Also increase the reference count
657 * so that the class doesn't get freed when the last instance
658 * goes. This means we can safely use static methods and avoids a
659 * double-free in devclass_delete_driver.
661 kobj_class_instantiate(driver);
664 * Make sure the devclass which the driver is implementing exists.
666 devclass_find_internal(driver->name, NULL, TRUE);
669 TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
672 * Call BUS_DRIVER_ADDED for any existing busses in this class,
673 * but only if the bus has already been attached (otherwise we
674 * might probe too early).
676 * This is what will cause a newly loaded module to be associated
677 * with hardware. bus_generic_driver_added() is typically what ends
680 for (i = 0; i < dc->maxunit; i++) {
681 if ((dev = dc->devices[i]) != NULL) {
682 if (dev->state >= DS_ATTACHED)
683 BUS_DRIVER_ADDED(dev, driver);
687 bus_data_generation_update();
692 devclass_delete_driver(devclass_t busclass, driver_t *driver)
694 devclass_t dc = devclass_find(driver->name);
700 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
706 * Find the link structure in the bus' list of drivers.
708 TAILQ_FOREACH(dl, &busclass->drivers, link)
709 if (dl->driver == driver)
713 PDEBUG(("%s not found in %s list", driver->name, busclass->name));
718 * Disassociate from any devices. We iterate through all the
719 * devices in the devclass of the driver and detach any which are
720 * using the driver and which have a parent in the devclass which
721 * we are deleting from.
723 * Note that since a driver can be in multiple devclasses, we
724 * should not detach devices which are not children of devices in
725 * the affected devclass.
727 for (i = 0; i < dc->maxunit; i++)
728 if (dc->devices[i]) {
729 dev = dc->devices[i];
730 if (dev->driver == driver && dev->parent &&
731 dev->parent->devclass == busclass) {
732 if ((error = device_detach(dev)) != 0)
734 device_set_driver(dev, NULL);
738 TAILQ_REMOVE(&busclass->drivers, dl, link);
741 kobj_class_uninstantiate(driver);
743 bus_data_generation_update();
748 devclass_find_driver_internal(devclass_t dc, const char *classname)
752 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
754 TAILQ_FOREACH(dl, &dc->drivers, link)
755 if (!strcmp(dl->driver->name, classname))
758 PDEBUG(("not found"));
763 devclass_find_driver(devclass_t dc, const char *classname)
767 dl = devclass_find_driver_internal(dc, classname);
775 devclass_get_name(devclass_t dc)
781 devclass_get_device(devclass_t dc, int unit)
783 if (dc == NULL || unit < 0 || unit >= dc->maxunit)
785 return(dc->devices[unit]);
789 devclass_get_softc(devclass_t dc, int unit)
793 dev = devclass_get_device(dc, unit);
797 return(device_get_softc(dev));
801 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
808 for (i = 0; i < dc->maxunit; i++)
812 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
815 for (i = 0; i < dc->maxunit; i++)
816 if (dc->devices[i]) {
817 list[count] = dc->devices[i];
828 * @brief Get a list of drivers in the devclass
830 * An array containing a list of pointers to all the drivers in the
831 * given devclass is allocated and returned in @p *listp. The number
832 * of drivers in the array is returned in @p *countp. The caller should
833 * free the array using @c free(p, M_TEMP).
835 * @param dc the devclass to examine
836 * @param listp gives location for array pointer return value
837 * @param countp gives location for number of array elements
841 * @retval ENOMEM the array allocation failed
844 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp)
851 TAILQ_FOREACH(dl, &dc->drivers, link)
853 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT);
858 TAILQ_FOREACH(dl, &dc->drivers, link) {
859 list[count] = dl->driver;
869 * @brief Get the number of devices in a devclass
871 * @param dc the devclass to examine
874 devclass_get_count(devclass_t dc)
879 for (i = 0; i < dc->maxunit; i++)
886 devclass_get_maxunit(devclass_t dc)
892 devclass_set_parent(devclass_t dc, devclass_t pdc)
898 devclass_get_parent(devclass_t dc)
904 devclass_alloc_unit(devclass_t dc, int *unitp)
908 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
910 /* If we have been given a wired unit number, check for existing device */
912 if (unit >= 0 && unit < dc->maxunit &&
913 dc->devices[unit] != NULL) {
915 kprintf("%s-: %s%d exists, using next available unit number\n",
916 dc->name, dc->name, unit);
917 /* find the next available slot */
918 while (++unit < dc->maxunit && dc->devices[unit] != NULL)
922 /* Unwired device, find the next available slot for it */
924 while (unit < dc->maxunit && dc->devices[unit] != NULL)
929 * We've selected a unit beyond the length of the table, so let's
930 * extend the table to make room for all units up to and including
933 if (unit >= dc->maxunit) {
937 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
938 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS,
942 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
944 kfree(dc->devices, M_BUS);
945 dc->devices = newlist;
946 dc->maxunit = newsize;
948 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
955 devclass_add_device(devclass_t dc, device_t dev)
959 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
961 buflen = strlen(dc->name) + 5;
962 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
966 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
967 kfree(dev->nameunit, M_BUS);
968 dev->nameunit = NULL;
971 dc->devices[dev->unit] = dev;
973 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
979 devclass_delete_device(devclass_t dc, device_t dev)
984 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
986 if (dev->devclass != dc || dc->devices[dev->unit] != dev)
987 panic("devclass_delete_device: inconsistent device class");
988 dc->devices[dev->unit] = NULL;
989 if (dev->flags & DF_WILDCARD)
991 dev->devclass = NULL;
992 kfree(dev->nameunit, M_BUS);
993 dev->nameunit = NULL;
999 make_device(device_t parent, const char *name, int unit)
1004 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
1007 dc = devclass_find_internal(name, NULL, TRUE);
1009 kprintf("make_device: can't find device class %s\n", name);
1015 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO);
1019 dev->parent = parent;
1020 TAILQ_INIT(&dev->children);
1021 kobj_init((kobj_t) dev, &null_class);
1023 dev->devclass = NULL;
1025 dev->nameunit = NULL;
1029 dev->flags = DF_ENABLED;
1032 dev->flags |= DF_WILDCARD;
1034 dev->flags |= DF_FIXEDCLASS;
1035 if (devclass_add_device(dc, dev) != 0) {
1036 kobj_delete((kobj_t)dev, M_BUS);
1043 dev->state = DS_NOTPRESENT;
1045 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
1046 bus_data_generation_update();
1052 device_print_child(device_t dev, device_t child)
1056 if (device_is_alive(child))
1057 retval += BUS_PRINT_CHILD(dev, child);
1059 retval += device_printf(child, " not found\n");
1065 device_add_child(device_t dev, const char *name, int unit)
1067 return device_add_child_ordered(dev, 0, name, unit);
1071 device_add_child_ordered(device_t dev, int order, const char *name, int unit)
1076 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
1079 child = make_device(dev, name, unit);
1082 child->order = order;
1084 TAILQ_FOREACH(place, &dev->children, link)
1085 if (place->order > order)
1090 * The device 'place' is the first device whose order is
1091 * greater than the new child.
1093 TAILQ_INSERT_BEFORE(place, child, link);
1096 * The new child's order is greater or equal to the order of
1097 * any existing device. Add the child to the tail of the list.
1099 TAILQ_INSERT_TAIL(&dev->children, child, link);
1102 bus_data_generation_update();
1107 device_delete_child(device_t dev, device_t child)
1110 device_t grandchild;
1112 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
1114 /* remove children first */
1115 while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
1116 error = device_delete_child(child, grandchild);
1121 if ((error = device_detach(child)) != 0)
1123 if (child->devclass)
1124 devclass_delete_device(child->devclass, child);
1125 TAILQ_REMOVE(&dev->children, child, link);
1126 TAILQ_REMOVE(&bus_data_devices, child, devlink);
1127 device_set_desc(child, NULL);
1128 kobj_delete((kobj_t)child, M_BUS);
1130 bus_data_generation_update();
1135 * @brief Delete all children devices of the given device, if any.
1137 * This function deletes all children devices of the given device, if
1138 * any, using the device_delete_child() function for each device it
1139 * finds. If a child device cannot be deleted, this function will
1140 * return an error code.
1142 * @param dev the parent device
1145 * @retval non-zero a device would not detach
1148 device_delete_children(device_t dev)
1153 PDEBUG(("Deleting all children of %s", DEVICENAME(dev)));
1157 while ((child = TAILQ_FIRST(&dev->children)) != NULL) {
1158 error = device_delete_child(dev, child);
1160 PDEBUG(("Failed deleting %s", DEVICENAME(child)));
1168 * @brief Find a device given a unit number
1170 * This is similar to devclass_get_devices() but only searches for
1171 * devices which have @p dev as a parent.
1173 * @param dev the parent device to search
1174 * @param unit the unit number to search for. If the unit is -1,
1175 * return the first child of @p dev which has name
1176 * @p classname (that is, the one with the lowest unit.)
1178 * @returns the device with the given unit number or @c
1179 * NULL if there is no such device
1182 device_find_child(device_t dev, const char *classname, int unit)
1187 dc = devclass_find(classname);
1192 child = devclass_get_device(dc, unit);
1193 if (child && child->parent == dev)
1196 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) {
1197 child = devclass_get_device(dc, unit);
1198 if (child && child->parent == dev)
1206 first_matching_driver(devclass_t dc, device_t dev)
1209 return(devclass_find_driver_internal(dc, dev->devclass->name));
1211 return(TAILQ_FIRST(&dc->drivers));
1215 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
1217 if (dev->devclass) {
1219 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
1220 if (!strcmp(dev->devclass->name, dl->driver->name))
1224 return(TAILQ_NEXT(last, link));
1228 device_probe_child(device_t dev, device_t child)
1231 driverlink_t best = NULL;
1233 int result, pri = 0;
1234 int hasclass = (child->devclass != NULL);
1238 panic("device_probe_child: parent device has no devclass");
1240 if (child->state == DS_ALIVE)
1243 for (; dc; dc = dc->parent) {
1244 for (dl = first_matching_driver(dc, child); dl;
1245 dl = next_matching_driver(dc, child, dl)) {
1246 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1247 device_set_driver(child, dl->driver);
1249 device_set_devclass(child, dl->driver->name);
1250 result = DEVICE_PROBE(child);
1252 device_set_devclass(child, 0);
1255 * If the driver returns SUCCESS, there can be
1256 * no higher match for this device.
1265 * The driver returned an error so it
1266 * certainly doesn't match.
1269 device_set_driver(child, 0);
1274 * A priority lower than SUCCESS, remember the
1275 * best matching driver. Initialise the value
1276 * of pri for the first match.
1278 if (best == NULL || result > pri) {
1285 * If we have unambiguous match in this devclass,
1286 * don't look in the parent.
1288 if (best && pri == 0)
1293 * If we found a driver, change state and initialise the devclass.
1296 if (!child->devclass)
1297 device_set_devclass(child, best->driver->name);
1298 device_set_driver(child, best->driver);
1301 * A bit bogus. Call the probe method again to make
1302 * sure that we have the right description.
1304 DEVICE_PROBE(child);
1307 bus_data_generation_update();
1308 child->state = DS_ALIVE;
1316 device_get_parent(device_t dev)
1322 device_get_children(device_t dev, device_t **devlistp, int *devcountp)
1329 TAILQ_FOREACH(child, &dev->children, link)
1332 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
1335 TAILQ_FOREACH(child, &dev->children, link) {
1336 list[count] = child;
1347 device_get_driver(device_t dev)
1349 return(dev->driver);
1353 device_get_devclass(device_t dev)
1355 return(dev->devclass);
1359 device_get_name(device_t dev)
1362 return devclass_get_name(dev->devclass);
1367 device_get_nameunit(device_t dev)
1369 return(dev->nameunit);
1373 device_get_unit(device_t dev)
1379 device_get_desc(device_t dev)
1385 device_get_flags(device_t dev)
1387 return(dev->devflags);
1391 device_print_prettyname(device_t dev)
1393 const char *name = device_get_name(dev);
1396 return kprintf("unknown: ");
1398 return kprintf("%s%d: ", name, device_get_unit(dev));
1402 device_printf(device_t dev, const char * fmt, ...)
1407 retval = device_print_prettyname(dev);
1408 __va_start(ap, fmt);
1409 retval += kvprintf(fmt, ap);
1415 device_set_desc_internal(device_t dev, const char* desc, int copy)
1417 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
1418 kfree(dev->desc, M_BUS);
1419 dev->flags &= ~DF_DESCMALLOCED;
1424 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
1426 strcpy(dev->desc, desc);
1427 dev->flags |= DF_DESCMALLOCED;
1430 /* Avoid a -Wcast-qual warning */
1431 dev->desc = (char *)(uintptr_t) desc;
1434 bus_data_generation_update();
1438 device_set_desc(device_t dev, const char* desc)
1440 device_set_desc_internal(dev, desc, FALSE);
1444 device_set_desc_copy(device_t dev, const char* desc)
1446 device_set_desc_internal(dev, desc, TRUE);
1450 device_set_flags(device_t dev, uint32_t flags)
1452 dev->devflags = flags;
1456 device_get_softc(device_t dev)
1462 device_set_softc(device_t dev, void *softc)
1464 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
1465 kfree(dev->softc, M_BUS);
1468 dev->flags |= DF_EXTERNALSOFTC;
1470 dev->flags &= ~DF_EXTERNALSOFTC;
1474 device_set_async_attach(device_t dev, int enable)
1477 dev->flags |= DF_ASYNCPROBE;
1479 dev->flags &= ~DF_ASYNCPROBE;
1483 device_get_ivars(device_t dev)
1489 device_set_ivars(device_t dev, void * ivars)
1498 device_get_state(device_t dev)
1504 device_enable(device_t dev)
1506 dev->flags |= DF_ENABLED;
1510 device_disable(device_t dev)
1512 dev->flags &= ~DF_ENABLED;
1519 device_busy(device_t dev)
1521 if (dev->state < DS_ATTACHED)
1522 panic("device_busy: called for unattached device");
1523 if (dev->busy == 0 && dev->parent)
1524 device_busy(dev->parent);
1526 dev->state = DS_BUSY;
1533 device_unbusy(device_t dev)
1535 if (dev->state != DS_BUSY)
1536 panic("device_unbusy: called for non-busy device");
1538 if (dev->busy == 0) {
1540 device_unbusy(dev->parent);
1541 dev->state = DS_ATTACHED;
1546 device_quiet(device_t dev)
1548 dev->flags |= DF_QUIET;
1552 device_verbose(device_t dev)
1554 dev->flags &= ~DF_QUIET;
1558 device_is_quiet(device_t dev)
1560 return((dev->flags & DF_QUIET) != 0);
1564 device_is_enabled(device_t dev)
1566 return((dev->flags & DF_ENABLED) != 0);
1570 device_is_alive(device_t dev)
1572 return(dev->state >= DS_ALIVE);
1576 device_is_attached(device_t dev)
1578 return(dev->state >= DS_ATTACHED);
1582 device_set_devclass(device_t dev, const char *classname)
1589 devclass_delete_device(dev->devclass, dev);
1593 if (dev->devclass) {
1594 kprintf("device_set_devclass: device class already set\n");
1598 dc = devclass_find_internal(classname, NULL, TRUE);
1602 error = devclass_add_device(dc, dev);
1604 bus_data_generation_update();
1609 device_set_driver(device_t dev, driver_t *driver)
1611 if (dev->state >= DS_ATTACHED)
1614 if (dev->driver == driver)
1617 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
1618 kfree(dev->softc, M_BUS);
1621 kobj_delete((kobj_t) dev, 0);
1622 dev->driver = driver;
1624 kobj_init((kobj_t) dev, (kobj_class_t) driver);
1625 if (!(dev->flags & DF_EXTERNALSOFTC))
1626 dev->softc = kmalloc(driver->size, M_BUS,
1627 M_INTWAIT | M_ZERO);
1629 kobj_init((kobj_t) dev, &null_class);
1632 bus_data_generation_update();
1637 device_probe_and_attach(device_t dev)
1639 device_t bus = dev->parent;
1642 if (dev->state >= DS_ALIVE)
1645 if ((dev->flags & DF_ENABLED) == 0) {
1647 device_print_prettyname(dev);
1648 kprintf("not probed (disabled)\n");
1653 error = device_probe_child(bus, dev);
1655 if (!(dev->flags & DF_DONENOMATCH)) {
1656 BUS_PROBE_NOMATCH(bus, dev);
1658 dev->flags |= DF_DONENOMATCH;
1664 * Output the exact device chain prior to the attach in case the
1665 * system locks up during attach, and generate the full info after
1666 * the attach so correct irq and other information is displayed.
1668 if (bootverbose && !device_is_quiet(dev)) {
1671 kprintf("%s", device_get_nameunit(dev));
1672 for (tmp = dev->parent; tmp; tmp = tmp->parent)
1673 kprintf(".%s", device_get_nameunit(tmp));
1676 if (!device_is_quiet(dev))
1677 device_print_child(bus, dev);
1678 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
1679 kprintf("%s: probing asynchronously\n",
1680 device_get_nameunit(dev));
1681 dev->state = DS_INPROGRESS;
1682 device_attach_async(dev);
1685 error = device_doattach(dev);
1691 * Device is known to be alive, do the attach asynchronously.
1692 * However, serialize the attaches with the mp lock.
1695 device_attach_async(device_t dev)
1699 atomic_add_int(&numasyncthreads, 1);
1700 lwkt_create(device_attach_thread, dev, &td, NULL,
1701 0, 0, "%s", (dev->desc ? dev->desc : "devattach"));
1705 device_attach_thread(void *arg)
1709 get_mplock(); /* XXX replace with devattach_token later */
1710 (void)device_doattach(dev);
1711 atomic_subtract_int(&numasyncthreads, 1);
1712 wakeup(&numasyncthreads);
1713 rel_mplock(); /* XXX replace with devattach_token later */
1717 * Device is known to be alive, do the attach (synchronous or asynchronous)
1720 device_doattach(device_t dev)
1722 device_t bus = dev->parent;
1723 int hasclass = (dev->devclass != NULL);
1726 error = DEVICE_ATTACH(dev);
1728 dev->state = DS_ATTACHED;
1729 if (bootverbose && !device_is_quiet(dev))
1730 device_print_child(bus, dev);
1733 kprintf("device_probe_and_attach: %s%d attach returned %d\n",
1734 dev->driver->name, dev->unit, error);
1735 /* Unset the class that was set in device_probe_child */
1737 device_set_devclass(dev, 0);
1738 device_set_driver(dev, NULL);
1739 dev->state = DS_NOTPRESENT;
1745 device_detach(device_t dev)
1749 PDEBUG(("%s", DEVICENAME(dev)));
1750 if (dev->state == DS_BUSY)
1752 if (dev->state != DS_ATTACHED)
1755 if ((error = DEVICE_DETACH(dev)) != 0)
1758 device_printf(dev, "detached\n");
1760 BUS_CHILD_DETACHED(dev->parent, dev);
1762 if (!(dev->flags & DF_FIXEDCLASS))
1763 devclass_delete_device(dev->devclass, dev);
1765 dev->state = DS_NOTPRESENT;
1766 device_set_driver(dev, NULL);
1772 device_shutdown(device_t dev)
1774 if (dev->state < DS_ATTACHED)
1776 PDEBUG(("%s", DEVICENAME(dev)));
1777 return DEVICE_SHUTDOWN(dev);
1781 device_set_unit(device_t dev, int unit)
1786 dc = device_get_devclass(dev);
1787 if (unit < dc->maxunit && dc->devices[unit])
1789 err = devclass_delete_device(dc, dev);
1793 err = devclass_add_device(dc, dev);
1797 bus_data_generation_update();
1801 /*======================================*/
1803 * Access functions for device resources.
1806 /* Supplied by config(8) in ioconf.c */
1807 extern struct config_device config_devtab[];
1808 extern int devtab_count;
1810 /* Runtime version */
1811 struct config_device *devtab = config_devtab;
1814 resource_new_name(const char *name, int unit)
1816 struct config_device *new;
1818 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP,
1819 M_INTWAIT | M_ZERO);
1820 if (devtab && devtab_count > 0)
1821 bcopy(devtab, new, devtab_count * sizeof(*new));
1822 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
1823 if (new[devtab_count].name == NULL) {
1827 strcpy(new[devtab_count].name, name);
1828 new[devtab_count].unit = unit;
1829 new[devtab_count].resource_count = 0;
1830 new[devtab_count].resources = NULL;
1831 if (devtab && devtab != config_devtab)
1832 kfree(devtab, M_TEMP);
1834 return devtab_count++;
1838 resource_new_resname(int j, const char *resname, resource_type type)
1840 struct config_resource *new;
1843 i = devtab[j].resource_count;
1844 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
1845 if (devtab[j].resources && i > 0)
1846 bcopy(devtab[j].resources, new, i * sizeof(*new));
1847 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
1848 if (new[i].name == NULL) {
1852 strcpy(new[i].name, resname);
1854 if (devtab[j].resources)
1855 kfree(devtab[j].resources, M_TEMP);
1856 devtab[j].resources = new;
1857 devtab[j].resource_count = i + 1;
1862 resource_match_string(int i, const char *resname, const char *value)
1865 struct config_resource *res;
1867 for (j = 0, res = devtab[i].resources;
1868 j < devtab[i].resource_count; j++, res++)
1869 if (!strcmp(res->name, resname)
1870 && res->type == RES_STRING
1871 && !strcmp(res->u.stringval, value))
1877 resource_find(const char *name, int unit, const char *resname,
1878 struct config_resource **result)
1881 struct config_resource *res;
1884 * First check specific instances, then generic.
1886 for (i = 0; i < devtab_count; i++) {
1887 if (devtab[i].unit < 0)
1889 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1890 res = devtab[i].resources;
1891 for (j = 0; j < devtab[i].resource_count; j++, res++)
1892 if (!strcmp(res->name, resname)) {
1898 for (i = 0; i < devtab_count; i++) {
1899 if (devtab[i].unit >= 0)
1901 /* XXX should this `&& devtab[i].unit == unit' be here? */
1902 /* XXX if so, then the generic match does nothing */
1903 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1904 res = devtab[i].resources;
1905 for (j = 0; j < devtab[i].resource_count; j++, res++)
1906 if (!strcmp(res->name, resname)) {
1916 resource_kenv(const char *name, int unit, const char *resname, long *result)
1921 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname);
1922 if ((env = kgetenv(buf)) != NULL) {
1923 *result = strtol(env, NULL, 0);
1930 resource_int_value(const char *name, int unit, const char *resname, int *result)
1932 struct config_resource *res;
1936 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
1937 *result = (int)kvalue;
1940 if ((error = resource_find(name, unit, resname, &res)) != 0)
1942 if (res->type != RES_INT)
1944 *result = res->u.intval;
1949 resource_long_value(const char *name, int unit, const char *resname,
1952 struct config_resource *res;
1956 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
1960 if ((error = resource_find(name, unit, resname, &res)) != 0)
1962 if (res->type != RES_LONG)
1964 *result = res->u.longval;
1969 resource_string_value(const char *name, int unit, const char *resname,
1970 const char **result)
1973 struct config_resource *res;
1975 if ((error = resource_find(name, unit, resname, &res)) != 0)
1977 if (res->type != RES_STRING)
1979 *result = res->u.stringval;
1984 resource_query_string(int i, const char *resname, const char *value)
1990 for (; i < devtab_count; i++)
1991 if (resource_match_string(i, resname, value) >= 0)
1997 resource_locate(int i, const char *resname)
2003 for (; i < devtab_count; i++)
2004 if (!strcmp(devtab[i].name, resname))
2010 resource_count(void)
2012 return(devtab_count);
2016 resource_query_name(int i)
2018 return(devtab[i].name);
2022 resource_query_unit(int i)
2024 return(devtab[i].unit);
2028 resource_create(const char *name, int unit, const char *resname,
2029 resource_type type, struct config_resource **result)
2032 struct config_resource *res = NULL;
2034 for (i = 0; i < devtab_count; i++)
2035 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2036 res = devtab[i].resources;
2040 i = resource_new_name(name, unit);
2043 res = devtab[i].resources;
2045 for (j = 0; j < devtab[i].resource_count; j++, res++)
2046 if (!strcmp(res->name, resname)) {
2050 j = resource_new_resname(i, resname, type);
2053 res = &devtab[i].resources[j];
2059 resource_set_int(const char *name, int unit, const char *resname, int value)
2062 struct config_resource *res;
2064 error = resource_create(name, unit, resname, RES_INT, &res);
2067 if (res->type != RES_INT)
2069 res->u.intval = value;
2074 resource_set_long(const char *name, int unit, const char *resname, long value)
2077 struct config_resource *res;
2079 error = resource_create(name, unit, resname, RES_LONG, &res);
2082 if (res->type != RES_LONG)
2084 res->u.longval = value;
2089 resource_set_string(const char *name, int unit, const char *resname,
2093 struct config_resource *res;
2095 error = resource_create(name, unit, resname, RES_STRING, &res);
2098 if (res->type != RES_STRING)
2100 if (res->u.stringval)
2101 kfree(res->u.stringval, M_TEMP);
2102 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
2103 if (res->u.stringval == NULL)
2105 strcpy(res->u.stringval, value);
2110 resource_cfgload(void *dummy __unused)
2112 struct config_resource *res, *cfgres;
2115 char *name, *resname;
2119 int config_devtab_count;
2121 config_devtab_count = devtab_count;
2125 for (i = 0; i < config_devtab_count; i++) {
2126 name = config_devtab[i].name;
2127 unit = config_devtab[i].unit;
2129 for (j = 0; j < config_devtab[i].resource_count; j++) {
2130 cfgres = config_devtab[i].resources;
2131 resname = cfgres[j].name;
2132 type = cfgres[j].type;
2133 error = resource_create(name, unit, resname, type,
2136 kprintf("create resource %s%d: error %d\n",
2140 if (res->type != type) {
2141 kprintf("type mismatch %s%d: %d != %d\n",
2142 name, unit, res->type, type);
2147 res->u.intval = cfgres[j].u.intval;
2150 res->u.longval = cfgres[j].u.longval;
2153 if (res->u.stringval)
2154 kfree(res->u.stringval, M_TEMP);
2155 stringval = cfgres[j].u.stringval;
2156 res->u.stringval = kmalloc(strlen(stringval) + 1,
2158 if (res->u.stringval == NULL)
2160 strcpy(res->u.stringval, stringval);
2163 panic("unknown resource type %d", type);
2168 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0)
2171 /*======================================*/
2173 * Some useful method implementations to make life easier for bus drivers.
2177 resource_list_init(struct resource_list *rl)
2183 resource_list_free(struct resource_list *rl)
2185 struct resource_list_entry *rle;
2187 while ((rle = SLIST_FIRST(rl)) != NULL) {
2189 panic("resource_list_free: resource entry is busy");
2190 SLIST_REMOVE_HEAD(rl, link);
2196 resource_list_add(struct resource_list *rl, int type, int rid,
2197 u_long start, u_long end, u_long count, int cpuid)
2199 struct resource_list_entry *rle;
2201 rle = resource_list_find(rl, type, rid);
2203 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS,
2205 SLIST_INSERT_HEAD(rl, rle, link);
2213 panic("resource_list_add: resource entry is busy");
2220 if (rle->cpuid != -1 && rle->cpuid != cpuid) {
2221 panic("resource_list_add: moving from cpu%d -> cpu%d",
2228 struct resource_list_entry*
2229 resource_list_find(struct resource_list *rl,
2232 struct resource_list_entry *rle;
2234 SLIST_FOREACH(rle, rl, link)
2235 if (rle->type == type && rle->rid == rid)
2241 resource_list_delete(struct resource_list *rl,
2244 struct resource_list_entry *rle = resource_list_find(rl, type, rid);
2247 if (rle->res != NULL)
2248 panic("resource_list_delete: resource has not been released");
2249 SLIST_REMOVE(rl, rle, resource_list_entry, link);
2255 resource_list_alloc(struct resource_list *rl,
2256 device_t bus, device_t child,
2258 u_long start, u_long end,
2259 u_long count, u_int flags, int cpuid)
2261 struct resource_list_entry *rle = NULL;
2262 int passthrough = (device_get_parent(child) != bus);
2263 int isdefault = (start == 0UL && end == ~0UL);
2266 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2268 start, end, count, flags, cpuid));
2271 rle = resource_list_find(rl, type, *rid);
2274 return(0); /* no resource of that type/rid */
2277 panic("resource_list_alloc: resource entry is busy");
2281 count = max(count, rle->count);
2282 end = max(rle->end, start + count - 1);
2286 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2287 type, rid, start, end, count,
2291 * Record the new range.
2294 rle->start = rman_get_start(rle->res);
2295 rle->end = rman_get_end(rle->res);
2303 resource_list_release(struct resource_list *rl,
2304 device_t bus, device_t child,
2305 int type, int rid, struct resource *res)
2307 struct resource_list_entry *rle = NULL;
2308 int passthrough = (device_get_parent(child) != bus);
2312 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2316 rle = resource_list_find(rl, type, rid);
2319 panic("resource_list_release: can't find resource");
2321 panic("resource_list_release: resource entry is not busy");
2323 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2333 resource_list_print_type(struct resource_list *rl, const char *name, int type,
2336 struct resource_list_entry *rle;
2337 int printed, retval;
2341 /* Yes, this is kinda cheating */
2342 SLIST_FOREACH(rle, rl, link) {
2343 if (rle->type == type) {
2345 retval += kprintf(" %s ", name);
2347 retval += kprintf(",");
2349 retval += kprintf(format, rle->start);
2350 if (rle->count > 1) {
2351 retval += kprintf("-");
2352 retval += kprintf(format, rle->start +
2361 * Generic driver/device identify functions. These will install a device
2362 * rendezvous point under the parent using the same name as the driver
2363 * name, which will at a later time be probed and attached.
2365 * These functions are used when the parent does not 'scan' its bus for
2366 * matching devices, or for the particular devices using these functions,
2367 * or when the device is a pseudo or synthesized device (such as can be
2368 * found under firewire and ppbus).
2371 bus_generic_identify(driver_t *driver, device_t parent)
2373 if (parent->state == DS_ATTACHED)
2375 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1);
2380 bus_generic_identify_sameunit(driver_t *driver, device_t parent)
2382 if (parent->state == DS_ATTACHED)
2384 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent));
2389 * Call DEVICE_IDENTIFY for each driver.
2392 bus_generic_probe(device_t dev)
2394 devclass_t dc = dev->devclass;
2397 TAILQ_FOREACH(dl, &dc->drivers, link) {
2398 DEVICE_IDENTIFY(dl->driver, dev);
2405 * This is an aweful hack due to the isa bus and autoconf code not
2406 * probing the ISA devices until after everything else has configured.
2407 * The ISA bus did a dummy attach long ago so we have to set it back
2408 * to an earlier state so the probe thinks its the initial probe and
2411 * XXX remove by properly defering the ISA bus scan.
2414 bus_generic_probe_hack(device_t dev)
2416 if (dev->state == DS_ATTACHED) {
2417 dev->state = DS_ALIVE;
2418 bus_generic_probe(dev);
2419 dev->state = DS_ATTACHED;
2425 bus_generic_attach(device_t dev)
2429 TAILQ_FOREACH(child, &dev->children, link) {
2430 device_probe_and_attach(child);
2437 bus_generic_detach(device_t dev)
2442 if (dev->state != DS_ATTACHED)
2445 TAILQ_FOREACH(child, &dev->children, link)
2446 if ((error = device_detach(child)) != 0)
2453 bus_generic_shutdown(device_t dev)
2457 TAILQ_FOREACH(child, &dev->children, link)
2458 device_shutdown(child);
2464 bus_generic_suspend(device_t dev)
2467 device_t child, child2;
2469 TAILQ_FOREACH(child, &dev->children, link) {
2470 error = DEVICE_SUSPEND(child);
2472 for (child2 = TAILQ_FIRST(&dev->children);
2473 child2 && child2 != child;
2474 child2 = TAILQ_NEXT(child2, link))
2475 DEVICE_RESUME(child2);
2483 bus_generic_resume(device_t dev)
2487 TAILQ_FOREACH(child, &dev->children, link)
2488 DEVICE_RESUME(child);
2489 /* if resume fails, there's nothing we can usefully do... */
2495 bus_print_child_header(device_t dev, device_t child)
2499 if (device_get_desc(child))
2500 retval += device_printf(child, "<%s>", device_get_desc(child));
2502 retval += kprintf("%s", device_get_nameunit(child));
2504 if (child->state != DS_ATTACHED)
2505 kprintf(" [tentative]");
2507 kprintf(" [attached!]");
2513 bus_print_child_footer(device_t dev, device_t child)
2515 return(kprintf(" on %s\n", device_get_nameunit(dev)));
2519 bus_generic_add_child(device_t dev, device_t child, int order,
2520 const char *name, int unit)
2523 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit);
2525 dev = device_add_child_ordered(child, order, name, unit);
2531 bus_generic_print_child(device_t dev, device_t child)
2535 retval += bus_print_child_header(dev, child);
2536 retval += bus_print_child_footer(dev, child);
2542 bus_generic_read_ivar(device_t dev, device_t child, int index,
2548 error = BUS_READ_IVAR(dev->parent, child, index, result);
2555 bus_generic_write_ivar(device_t dev, device_t child, int index,
2561 error = BUS_WRITE_IVAR(dev->parent, child, index, value);
2568 * Resource list are used for iterations, do not recurse.
2570 struct resource_list *
2571 bus_generic_get_resource_list(device_t dev, device_t child)
2577 bus_generic_driver_added(device_t dev, driver_t *driver)
2581 DEVICE_IDENTIFY(driver, dev);
2582 TAILQ_FOREACH(child, &dev->children, link) {
2583 if (child->state == DS_NOTPRESENT)
2584 device_probe_and_attach(child);
2589 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
2590 int flags, driver_intr_t *intr, void *arg, void **cookiep,
2591 lwkt_serialize_t serializer, const char *desc)
2593 /* Propagate up the bus hierarchy until someone handles it. */
2595 return BUS_SETUP_INTR(dev->parent, child, irq, flags,
2596 intr, arg, cookiep, serializer, desc);
2603 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
2606 /* Propagate up the bus hierarchy until someone handles it. */
2608 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
2614 bus_generic_disable_intr(device_t dev, device_t child, void *cookie)
2617 return(BUS_DISABLE_INTR(dev->parent, child, cookie));
2623 bus_generic_enable_intr(device_t dev, device_t child, void *cookie)
2626 BUS_ENABLE_INTR(dev->parent, child, cookie);
2630 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
2631 enum intr_polarity pol)
2633 /* Propagate up the bus hierarchy until someone handles it. */
2635 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol));
2641 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
2642 u_long start, u_long end, u_long count, u_int flags, int cpuid)
2644 /* Propagate up the bus hierarchy until someone handles it. */
2646 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
2647 start, end, count, flags, cpuid));
2653 bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
2656 /* Propagate up the bus hierarchy until someone handles it. */
2658 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
2664 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
2667 /* Propagate up the bus hierarchy until someone handles it. */
2669 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
2675 bus_generic_deactivate_resource(device_t dev, device_t child, int type,
2676 int rid, struct resource *r)
2678 /* Propagate up the bus hierarchy until someone handles it. */
2680 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
2687 bus_generic_get_resource(device_t dev, device_t child, int type, int rid,
2688 u_long *startp, u_long *countp)
2694 error = BUS_GET_RESOURCE(dev->parent, child, type, rid,
2701 bus_generic_set_resource(device_t dev, device_t child, int type, int rid,
2702 u_long start, u_long count, int cpuid)
2708 error = BUS_SET_RESOURCE(dev->parent, child, type, rid,
2709 start, count, cpuid);
2715 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid)
2718 BUS_DELETE_RESOURCE(dev, child, type, rid);
2722 * @brief Helper function for implementing BUS_GET_DMA_TAG().
2724 * This simple implementation of BUS_GET_DMA_TAG() simply calls the
2725 * BUS_GET_DMA_TAG() method of the parent of @p dev.
2728 bus_generic_get_dma_tag(device_t dev, device_t child)
2731 /* Propagate up the bus hierarchy until someone handles it. */
2732 if (dev->parent != NULL)
2733 return (BUS_GET_DMA_TAG(dev->parent, child));
2738 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
2739 u_long *startp, u_long *countp)
2741 struct resource_list *rl = NULL;
2742 struct resource_list_entry *rle = NULL;
2744 rl = BUS_GET_RESOURCE_LIST(dev, child);
2748 rle = resource_list_find(rl, type, rid);
2753 *startp = rle->start;
2755 *countp = rle->count;
2761 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
2762 u_long start, u_long count, int cpuid)
2764 struct resource_list *rl = NULL;
2766 rl = BUS_GET_RESOURCE_LIST(dev, child);
2770 resource_list_add(rl, type, rid, start, (start + count - 1), count,
2777 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
2779 struct resource_list *rl = NULL;
2781 rl = BUS_GET_RESOURCE_LIST(dev, child);
2785 resource_list_delete(rl, type, rid);
2789 bus_generic_rl_release_resource(device_t dev, device_t child, int type,
2790 int rid, struct resource *r)
2792 struct resource_list *rl = NULL;
2794 rl = BUS_GET_RESOURCE_LIST(dev, child);
2798 return(resource_list_release(rl, dev, child, type, rid, r));
2802 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
2803 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid)
2805 struct resource_list *rl = NULL;
2807 rl = BUS_GET_RESOURCE_LIST(dev, child);
2811 return(resource_list_alloc(rl, dev, child, type, rid,
2812 start, end, count, flags, cpuid));
2816 bus_generic_child_present(device_t bus, device_t child)
2818 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
2823 * Some convenience functions to make it easier for drivers to use the
2824 * resource-management functions. All these really do is hide the
2825 * indirection through the parent's method table, making for slightly
2826 * less-wordy code. In the future, it might make sense for this code
2827 * to maintain some sort of a list of resources allocated by each device.
2830 bus_alloc_resources(device_t dev, struct resource_spec *rs,
2831 struct resource **res)
2835 for (i = 0; rs[i].type != -1; i++)
2837 for (i = 0; rs[i].type != -1; i++) {
2838 res[i] = bus_alloc_resource_any(dev,
2839 rs[i].type, &rs[i].rid, rs[i].flags);
2840 if (res[i] == NULL) {
2841 bus_release_resources(dev, rs, res);
2849 bus_release_resources(device_t dev, const struct resource_spec *rs,
2850 struct resource **res)
2854 for (i = 0; rs[i].type != -1; i++)
2855 if (res[i] != NULL) {
2856 bus_release_resource(
2857 dev, rs[i].type, rs[i].rid, res[i]);
2863 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
2864 u_long count, u_int flags)
2866 if (dev->parent == NULL)
2868 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
2873 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags)
2875 if (dev->parent == NULL)
2877 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid,
2878 irq, irq, 1, flags, machintr_legacy_intr_cpuid(irq));
2882 bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
2884 if (dev->parent == NULL)
2886 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2890 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
2892 if (dev->parent == NULL)
2894 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2898 bus_release_resource(device_t dev, int type, int rid, struct resource *r)
2900 if (dev->parent == NULL)
2902 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
2906 bus_setup_intr_descr(device_t dev, struct resource *r, int flags,
2907 driver_intr_t handler, void *arg, void **cookiep,
2908 lwkt_serialize_t serializer, const char *desc)
2910 if (dev->parent == NULL)
2912 return BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
2913 cookiep, serializer, desc);
2917 bus_setup_intr(device_t dev, struct resource *r, int flags,
2918 driver_intr_t handler, void *arg, void **cookiep,
2919 lwkt_serialize_t serializer)
2921 return bus_setup_intr_descr(dev, r, flags, handler, arg, cookiep,
2926 bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
2928 if (dev->parent == NULL)
2930 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
2934 bus_enable_intr(device_t dev, void *cookie)
2937 BUS_ENABLE_INTR(dev->parent, dev, cookie);
2941 bus_disable_intr(device_t dev, void *cookie)
2944 return(BUS_DISABLE_INTR(dev->parent, dev, cookie));
2950 bus_set_resource(device_t dev, int type, int rid,
2951 u_long start, u_long count, int cpuid)
2953 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
2954 start, count, cpuid));
2958 bus_get_resource(device_t dev, int type, int rid,
2959 u_long *startp, u_long *countp)
2961 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2966 bus_get_resource_start(device_t dev, int type, int rid)
2968 u_long start, count;
2971 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2979 bus_get_resource_count(device_t dev, int type, int rid)
2981 u_long start, count;
2984 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2992 bus_delete_resource(device_t dev, int type, int rid)
2994 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
2998 bus_child_present(device_t child)
3000 return (BUS_CHILD_PRESENT(device_get_parent(child), child));
3004 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
3008 parent = device_get_parent(child);
3009 if (parent == NULL) {
3013 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
3017 bus_child_location_str(device_t child, char *buf, size_t buflen)
3021 parent = device_get_parent(child);
3022 if (parent == NULL) {
3026 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
3030 * @brief Wrapper function for BUS_GET_DMA_TAG().
3032 * This function simply calls the BUS_GET_DMA_TAG() method of the
3036 bus_get_dma_tag(device_t dev)
3040 parent = device_get_parent(dev);
3043 return (BUS_GET_DMA_TAG(parent, dev));
3047 root_print_child(device_t dev, device_t child)
3053 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
3054 void **cookiep, lwkt_serialize_t serializer, const char *desc)
3057 * If an interrupt mapping gets to here something bad has happened.
3059 panic("root_setup_intr");
3063 * If we get here, assume that the device is permanant and really is
3064 * present in the system. Removable bus drivers are expected to intercept
3065 * this call long before it gets here. We return -1 so that drivers that
3066 * really care can check vs -1 or some ERRNO returned higher in the food
3070 root_child_present(device_t dev, device_t child)
3076 * XXX NOTE! other defaults may be set in bus_if.m
3078 static kobj_method_t root_methods[] = {
3079 /* Device interface */
3080 KOBJMETHOD(device_shutdown, bus_generic_shutdown),
3081 KOBJMETHOD(device_suspend, bus_generic_suspend),
3082 KOBJMETHOD(device_resume, bus_generic_resume),
3085 KOBJMETHOD(bus_add_child, bus_generic_add_child),
3086 KOBJMETHOD(bus_print_child, root_print_child),
3087 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
3088 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
3089 KOBJMETHOD(bus_setup_intr, root_setup_intr),
3090 KOBJMETHOD(bus_child_present, root_child_present),
3095 static driver_t root_driver = {
3102 devclass_t root_devclass;
3105 root_bus_module_handler(module_t mod, int what, void* arg)
3109 TAILQ_INIT(&bus_data_devices);
3110 root_bus = make_device(NULL, "root", 0);
3111 root_bus->desc = "System root bus";
3112 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
3113 root_bus->driver = &root_driver;
3114 root_bus->state = DS_ALIVE;
3115 root_devclass = devclass_find_internal("root", NULL, FALSE);
3120 device_shutdown(root_bus);
3127 static moduledata_t root_bus_mod = {
3129 root_bus_module_handler,
3132 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
3135 root_bus_configure(void)
3143 * handle device_identify based device attachments to the root_bus
3144 * (typically nexus).
3146 bus_generic_probe(root_bus);
3149 * Probe and attach the devices under root_bus.
3151 TAILQ_FOREACH(dev, &root_bus->children, link) {
3152 device_probe_and_attach(dev);
3156 * Wait for all asynchronous attaches to complete. If we don't
3157 * our legacy ISA bus scan could steal device unit numbers or
3161 if (numasyncthreads)
3162 kprintf("Waiting for async drivers to attach\n");
3163 while (numasyncthreads > 0) {
3164 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK)
3166 if (warncount == 0) {
3167 kprintf("Warning: Still waiting for %d "
3168 "drivers to attach\n", numasyncthreads);
3169 } else if (warncount == -30) {
3170 kprintf("Giving up on %d drivers\n", numasyncthreads);
3174 root_bus->state = DS_ATTACHED;
3178 driver_module_handler(module_t mod, int what, void *arg)
3181 struct driver_module_data *dmd;
3182 devclass_t bus_devclass;
3183 kobj_class_t driver;
3184 const char *parentname;
3186 dmd = (struct driver_module_data *)arg;
3187 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
3192 if (dmd->dmd_chainevh)
3193 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3195 driver = dmd->dmd_driver;
3196 PDEBUG(("Loading module: driver %s on bus %s",
3197 DRIVERNAME(driver), dmd->dmd_busname));
3200 * If the driver has any base classes, make the
3201 * devclass inherit from the devclass of the driver's
3202 * first base class. This will allow the system to
3203 * search for drivers in both devclasses for children
3204 * of a device using this driver.
3206 if (driver->baseclasses)
3207 parentname = driver->baseclasses[0]->name;
3210 *dmd->dmd_devclass = devclass_find_internal(driver->name,
3213 error = devclass_add_driver(bus_devclass, driver);
3219 PDEBUG(("Unloading module: driver %s from bus %s",
3220 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
3221 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
3223 if (!error && dmd->dmd_chainevh)
3224 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3234 * The _short versions avoid iteration by not calling anything that prints
3235 * more than oneliners. I love oneliners.
3239 print_device_short(device_t dev, int indent)
3244 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
3245 dev->unit, dev->desc,
3246 (dev->parent? "":"no "),
3247 (TAILQ_EMPTY(&dev->children)? "no ":""),
3248 (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
3249 (dev->flags&DF_FIXEDCLASS? "fixed,":""),
3250 (dev->flags&DF_WILDCARD? "wildcard,":""),
3251 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
3252 (dev->ivars? "":"no "),
3253 (dev->softc? "":"no "),
3258 print_device(device_t dev, int indent)
3263 print_device_short(dev, indent);
3265 indentprintf(("Parent:\n"));
3266 print_device_short(dev->parent, indent+1);
3267 indentprintf(("Driver:\n"));
3268 print_driver_short(dev->driver, indent+1);
3269 indentprintf(("Devclass:\n"));
3270 print_devclass_short(dev->devclass, indent+1);
3274 * Print the device and all its children (indented).
3277 print_device_tree_short(device_t dev, int indent)
3284 print_device_short(dev, indent);
3286 TAILQ_FOREACH(child, &dev->children, link)
3287 print_device_tree_short(child, indent+1);
3291 * Print the device and all its children (indented).
3294 print_device_tree(device_t dev, int indent)
3301 print_device(dev, indent);
3303 TAILQ_FOREACH(child, &dev->children, link)
3304 print_device_tree(child, indent+1);
3308 print_driver_short(driver_t *driver, int indent)
3313 indentprintf(("driver %s: softc size = %zu\n",
3314 driver->name, driver->size));
3318 print_driver(driver_t *driver, int indent)
3323 print_driver_short(driver, indent);
3328 print_driver_list(driver_list_t drivers, int indent)
3330 driverlink_t driver;
3332 TAILQ_FOREACH(driver, &drivers, link)
3333 print_driver(driver->driver, indent);
3337 print_devclass_short(devclass_t dc, int indent)
3342 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
3346 print_devclass(devclass_t dc, int indent)
3353 print_devclass_short(dc, indent);
3354 indentprintf(("Drivers:\n"));
3355 print_driver_list(dc->drivers, indent+1);
3357 indentprintf(("Devices:\n"));
3358 for (i = 0; i < dc->maxunit; i++)
3360 print_device(dc->devices[i], indent+1);
3364 print_devclass_list_short(void)
3368 kprintf("Short listing of devclasses, drivers & devices:\n");
3369 TAILQ_FOREACH(dc, &devclasses, link) {
3370 print_devclass_short(dc, 0);
3375 print_devclass_list(void)
3379 kprintf("Full listing of devclasses, drivers & devices:\n");
3380 TAILQ_FOREACH(dc, &devclasses, link) {
3381 print_devclass(dc, 0);
3388 * Check to see if a device is disabled via a disabled hint.
3391 resource_disabled(const char *name, int unit)
3395 error = resource_int_value(name, unit, "disabled", &value);
3402 * User-space access to the device tree.
3404 * We implement a small set of nodes:
3406 * hw.bus Single integer read method to obtain the
3407 * current generation count.
3408 * hw.bus.devices Reads the entire device tree in flat space.
3409 * hw.bus.rman Resource manager interface
3411 * We might like to add the ability to scan devclasses and/or drivers to
3412 * determine what else is currently loaded/available.
3416 sysctl_bus(SYSCTL_HANDLER_ARGS)
3418 struct u_businfo ubus;
3420 ubus.ub_version = BUS_USER_VERSION;
3421 ubus.ub_generation = bus_data_generation;
3423 return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
3425 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
3426 "bus-related data");
3429 sysctl_devices(SYSCTL_HANDLER_ARGS)
3431 int *name = (int *)arg1;
3432 u_int namelen = arg2;
3435 struct u_device udev; /* XXX this is a bit big */
3441 if (bus_data_generation_check(name[0]))
3447 * Scan the list of devices, looking for the requested index.
3449 TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
3457 * Populate the return array.
3459 bzero(&udev, sizeof(udev));
3460 udev.dv_handle = (uintptr_t)dev;
3461 udev.dv_parent = (uintptr_t)dev->parent;
3462 if (dev->nameunit != NULL)
3463 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
3464 if (dev->desc != NULL)
3465 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
3466 if (dev->driver != NULL && dev->driver->name != NULL)
3467 strlcpy(udev.dv_drivername, dev->driver->name,
3468 sizeof(udev.dv_drivername));
3469 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
3470 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
3471 udev.dv_devflags = dev->devflags;
3472 udev.dv_flags = dev->flags;
3473 udev.dv_state = dev->state;
3474 error = SYSCTL_OUT(req, &udev, sizeof(udev));
3478 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
3479 "system device tree");
3482 bus_data_generation_check(int generation)
3484 if (generation != bus_data_generation)
3487 /* XXX generate optimised lists here? */
3492 bus_data_generation_update(void)
3494 bus_data_generation++;
3498 intr_str_polarity(enum intr_polarity pola)
3501 case INTR_POLARITY_LOW:
3504 case INTR_POLARITY_HIGH:
3507 case INTR_POLARITY_CONFORM:
3514 intr_str_trigger(enum intr_trigger trig)
3517 case INTR_TRIGGER_EDGE:
3520 case INTR_TRIGGER_LEVEL:
3523 case INTR_TRIGGER_CONFORM:
3530 device_getenv_int(device_t dev, const char *knob, int def)
3534 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob);
3535 kgetenv_int(env, &def);