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>
50 #include <sys/vnode.h>
52 #include <machine/stdarg.h> /* for device_printf() */
54 #include <sys/thread2.h>
56 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL);
57 SYSCTL_NODE(, OID_AUTO, dev, CTLFLAG_RW, NULL, NULL);
59 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
62 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n"))
63 #define DEVICENAME(d) ((d)? device_get_name(d): "no device")
64 #define DRIVERNAME(d) ((d)? d->name : "no driver")
65 #define DEVCLANAME(d) ((d)? d->name : "no devclass")
67 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
68 * prevent syslog from deleting initial spaces
70 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0)
72 static void print_device_short(device_t dev, int indent);
73 static void print_device(device_t dev, int indent);
74 void print_device_tree_short(device_t dev, int indent);
75 void print_device_tree(device_t dev, int indent);
76 static void print_driver_short(driver_t *driver, int indent);
77 static void print_driver(driver_t *driver, int indent);
78 static void print_driver_list(driver_list_t drivers, int indent);
79 static void print_devclass_short(devclass_t dc, int indent);
80 static void print_devclass(devclass_t dc, int indent);
81 void print_devclass_list_short(void);
82 void print_devclass_list(void);
85 /* Make the compiler ignore the function calls */
86 #define PDEBUG(a) /* nop */
87 #define DEVICENAME(d) /* nop */
88 #define DRIVERNAME(d) /* nop */
89 #define DEVCLANAME(d) /* nop */
91 #define print_device_short(d,i) /* nop */
92 #define print_device(d,i) /* nop */
93 #define print_device_tree_short(d,i) /* nop */
94 #define print_device_tree(d,i) /* nop */
95 #define print_driver_short(d,i) /* nop */
96 #define print_driver(d,i) /* nop */
97 #define print_driver_list(d,i) /* nop */
98 #define print_devclass_short(d,i) /* nop */
99 #define print_devclass(d,i) /* nop */
100 #define print_devclass_list_short() /* nop */
101 #define print_devclass_list() /* nop */
109 DEVCLASS_SYSCTL_PARENT,
113 devclass_sysctl_handler(SYSCTL_HANDLER_ARGS)
115 devclass_t dc = (devclass_t)arg1;
119 case DEVCLASS_SYSCTL_PARENT:
120 value = dc->parent ? dc->parent->name : "";
125 return (SYSCTL_OUT(req, value, strlen(value)));
129 devclass_sysctl_init(devclass_t dc)
132 if (dc->sysctl_tree != NULL)
134 sysctl_ctx_init(&dc->sysctl_ctx);
135 dc->sysctl_tree = SYSCTL_ADD_NODE(&dc->sysctl_ctx,
136 SYSCTL_STATIC_CHILDREN(_dev), OID_AUTO, dc->name,
137 CTLFLAG_RD, NULL, "");
138 SYSCTL_ADD_PROC(&dc->sysctl_ctx, SYSCTL_CHILDREN(dc->sysctl_tree),
139 OID_AUTO, "%parent", CTLTYPE_STRING | CTLFLAG_RD,
140 dc, DEVCLASS_SYSCTL_PARENT, devclass_sysctl_handler, "A",
146 DEVICE_SYSCTL_DRIVER,
147 DEVICE_SYSCTL_LOCATION,
148 DEVICE_SYSCTL_PNPINFO,
149 DEVICE_SYSCTL_PARENT,
153 device_sysctl_handler(SYSCTL_HANDLER_ARGS)
155 device_t dev = (device_t)arg1;
162 case DEVICE_SYSCTL_DESC:
163 value = dev->desc ? dev->desc : "";
165 case DEVICE_SYSCTL_DRIVER:
166 value = dev->driver ? dev->driver->name : "";
168 case DEVICE_SYSCTL_LOCATION:
169 value = buf = kmalloc(1024, M_BUS, M_WAITOK | M_ZERO);
170 bus_child_location_str(dev, buf, 1024);
172 case DEVICE_SYSCTL_PNPINFO:
173 value = buf = kmalloc(1024, M_BUS, M_WAITOK | M_ZERO);
174 bus_child_pnpinfo_str(dev, buf, 1024);
176 case DEVICE_SYSCTL_PARENT:
177 value = dev->parent ? dev->parent->nameunit : "";
182 error = SYSCTL_OUT(req, value, strlen(value));
189 device_sysctl_init(device_t dev)
191 devclass_t dc = dev->devclass;
193 if (dev->sysctl_tree != NULL)
195 devclass_sysctl_init(dc);
196 sysctl_ctx_init(&dev->sysctl_ctx);
197 dev->sysctl_tree = SYSCTL_ADD_NODE(&dev->sysctl_ctx,
198 SYSCTL_CHILDREN(dc->sysctl_tree), OID_AUTO,
199 dev->nameunit + strlen(dc->name),
200 CTLFLAG_RD, NULL, "");
201 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
202 OID_AUTO, "%desc", CTLTYPE_STRING | CTLFLAG_RD,
203 dev, DEVICE_SYSCTL_DESC, device_sysctl_handler, "A",
204 "device description");
205 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
206 OID_AUTO, "%driver", CTLTYPE_STRING | CTLFLAG_RD,
207 dev, DEVICE_SYSCTL_DRIVER, device_sysctl_handler, "A",
208 "device driver name");
209 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
210 OID_AUTO, "%location", CTLTYPE_STRING | CTLFLAG_RD,
211 dev, DEVICE_SYSCTL_LOCATION, device_sysctl_handler, "A",
212 "device location relative to parent");
213 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
214 OID_AUTO, "%pnpinfo", CTLTYPE_STRING | CTLFLAG_RD,
215 dev, DEVICE_SYSCTL_PNPINFO, device_sysctl_handler, "A",
216 "device identification");
217 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
218 OID_AUTO, "%parent", CTLTYPE_STRING | CTLFLAG_RD,
219 dev, DEVICE_SYSCTL_PARENT, device_sysctl_handler, "A",
224 device_sysctl_update(device_t dev)
226 devclass_t dc = dev->devclass;
228 if (dev->sysctl_tree == NULL)
230 sysctl_rename_oid(dev->sysctl_tree, dev->nameunit + strlen(dc->name));
234 device_sysctl_fini(device_t dev)
236 if (dev->sysctl_tree == NULL)
238 sysctl_ctx_free(&dev->sysctl_ctx);
239 dev->sysctl_tree = NULL;
242 static void device_attach_async(device_t dev);
243 static void device_attach_thread(void *arg);
244 static int device_doattach(device_t dev);
246 static int do_async_attach = 0;
247 static int numasyncthreads;
248 TUNABLE_INT("kern.do_async_attach", &do_async_attach);
251 * /dev/devctl implementation
255 * This design allows only one reader for /dev/devctl. This is not desirable
256 * in the long run, but will get a lot of hair out of this implementation.
257 * Maybe we should make this device a clonable device.
259 * Also note: we specifically do not attach a device to the device_t tree
260 * to avoid potential chicken and egg problems. One could argue that all
261 * of this belongs to the root node. One could also further argue that the
262 * sysctl interface that we have not might more properly be an ioctl
263 * interface, but at this stage of the game, I'm not inclined to rock that
266 * I'm also not sure that the SIGIO support is done correctly or not, as
267 * I copied it from a driver that had SIGIO support that likely hasn't been
268 * tested since 3.4 or 2.2.8!
271 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS);
272 static int devctl_disable = 0;
273 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable);
274 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0,
275 sysctl_devctl_disable, "I", "devctl disable");
277 static d_open_t devopen;
278 static d_close_t devclose;
279 static d_read_t devread;
280 static d_ioctl_t devioctl;
281 static d_kqfilter_t devkqfilter;
283 static struct dev_ops devctl_ops = {
284 { "devctl", 0, D_MPSAFE },
289 .d_kqfilter = devkqfilter
292 struct dev_event_info
295 TAILQ_ENTRY(dev_event_info) dei_link;
298 TAILQ_HEAD(devq, dev_event_info);
300 static struct dev_softc
306 struct proc *async_proc;
310 * Chicken-and-egg problem with devfs, get the queue operational early.
315 lockinit(&devsoftc.lock, "dev mtx", 0, 0);
316 TAILQ_INIT(&devsoftc.devq);
318 SYSINIT(predevinit, SI_SUB_CREATE_INIT, SI_ORDER_ANY, predevinit, 0);
324 * WARNING! make_dev() can call back into devctl_queue_data()
327 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl");
331 devopen(struct dev_open_args *ap)
333 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
334 if (devsoftc.inuse) {
335 lockmgr(&devsoftc.lock, LK_RELEASE);
340 devsoftc.async_proc = NULL;
341 lockmgr(&devsoftc.lock, LK_RELEASE);
347 devclose(struct dev_close_args *ap)
349 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
352 lockmgr(&devsoftc.lock, LK_RELEASE);
358 * The read channel for this device is used to report changes to
359 * userland in realtime. We are required to free the data as well as
360 * the n1 object because we allocate them separately. Also note that
361 * we return one record at a time. If you try to read this device a
362 * character at a time, you will lose the rest of the data. Listening
363 * programs are expected to cope.
366 devread(struct dev_read_args *ap)
368 struct uio *uio = ap->a_uio;
369 struct dev_event_info *n1;
372 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
373 while (TAILQ_EMPTY(&devsoftc.devq)) {
374 if (ap->a_ioflag & IO_NDELAY) {
375 lockmgr(&devsoftc.lock, LK_RELEASE);
378 tsleep_interlock(&devsoftc, PCATCH);
379 lockmgr(&devsoftc.lock, LK_RELEASE);
380 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0);
381 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
384 * Need to translate ERESTART to EINTR here? -- jake
386 lockmgr(&devsoftc.lock, LK_RELEASE);
390 n1 = TAILQ_FIRST(&devsoftc.devq);
391 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
392 lockmgr(&devsoftc.lock, LK_RELEASE);
393 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio);
394 kfree(n1->dei_data, M_BUS);
400 devioctl(struct dev_ioctl_args *ap)
407 if (*(int*)ap->a_data)
408 devsoftc.async_proc = curproc;
410 devsoftc.async_proc = NULL;
413 /* (un)Support for other fcntl() calls. */
425 static void dev_filter_detach(struct knote *);
426 static int dev_filter_read(struct knote *, long);
428 static struct filterops dev_filtops =
429 { FILTEROP_ISFD | FILTEROP_MPSAFE, NULL,
430 dev_filter_detach, dev_filter_read };
433 devkqfilter(struct dev_kqfilter_args *ap)
435 struct knote *kn = ap->a_kn;
439 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
441 switch (kn->kn_filter) {
443 kn->kn_fop = &dev_filtops;
446 ap->a_result = EOPNOTSUPP;
447 lockmgr(&devsoftc.lock, LK_RELEASE);
451 klist = &devsoftc.kq.ki_note;
452 knote_insert(klist, kn);
454 lockmgr(&devsoftc.lock, LK_RELEASE);
460 dev_filter_detach(struct knote *kn)
464 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
465 klist = &devsoftc.kq.ki_note;
466 knote_remove(klist, kn);
467 lockmgr(&devsoftc.lock, LK_RELEASE);
471 dev_filter_read(struct knote *kn, long hint)
475 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
476 if (!TAILQ_EMPTY(&devsoftc.devq))
478 lockmgr(&devsoftc.lock, LK_RELEASE);
485 * @brief Return whether the userland process is running
488 devctl_process_running(void)
490 return (devsoftc.inuse == 1);
494 * @brief Queue data to be read from the devctl device
496 * Generic interface to queue data to the devctl device. It is
497 * assumed that @p data is properly formatted. It is further assumed
498 * that @p data is allocated using the M_BUS malloc type.
501 devctl_queue_data(char *data)
503 struct dev_event_info *n1 = NULL;
506 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT);
510 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
511 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link);
513 lockmgr(&devsoftc.lock, LK_RELEASE);
514 KNOTE(&devsoftc.kq.ki_note, 0);
515 p = devsoftc.async_proc;
521 * @brief Send a 'notification' to userland, using standard ways
524 devctl_notify(const char *system, const char *subsystem, const char *type,
531 return; /* BOGUS! Must specify system. */
532 if (subsystem == NULL)
533 return; /* BOGUS! Must specify subsystem. */
535 return; /* BOGUS! Must specify type. */
536 len += strlen(" system=") + strlen(system);
537 len += strlen(" subsystem=") + strlen(subsystem);
538 len += strlen(" type=") + strlen(type);
539 /* add in the data message plus newline. */
542 len += 3; /* '!', '\n', and NUL */
543 msg = kmalloc(len, M_BUS, M_NOWAIT);
545 return; /* Drop it on the floor */
547 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n",
548 system, subsystem, type, data);
550 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n",
551 system, subsystem, type);
552 devctl_queue_data(msg);
556 * Common routine that tries to make sending messages as easy as possible.
557 * We allocate memory for the data, copy strings into that, but do not
558 * free it unless there's an error. The dequeue part of the driver should
559 * free the data. We don't send data when the device is disabled. We do
560 * send data, even when we have no listeners, because we wish to avoid
561 * races relating to startup and restart of listening applications.
563 * devaddq is designed to string together the type of event, with the
564 * object of that event, plus the plug and play info and location info
565 * for that event. This is likely most useful for devices, but less
566 * useful for other consumers of this interface. Those should use
567 * the devctl_queue_data() interface instead.
570 devaddq(const char *type, const char *what, device_t dev)
579 data = kmalloc(1024, M_BUS, M_NOWAIT);
583 /* get the bus specific location of this device */
584 loc = kmalloc(1024, M_BUS, M_NOWAIT);
588 bus_child_location_str(dev, loc, 1024);
590 /* Get the bus specific pnp info of this device */
591 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
595 bus_child_pnpinfo_str(dev, pnp, 1024);
597 /* Get the parent of this device, or / if high enough in the tree. */
598 if (device_get_parent(dev) == NULL)
599 parstr = "."; /* Or '/' ? */
601 parstr = device_get_nameunit(device_get_parent(dev));
602 /* String it all together. */
603 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp,
607 devctl_queue_data(data);
620 * A device was added to the tree. We are called just after it successfully
621 * attaches (that is, probe and attach success for this device). No call
622 * is made if a device is merely parented into the tree. See devnomatch
623 * if probe fails. If attach fails, no notification is sent (but maybe
624 * we should have a different message for this).
627 devadded(device_t dev)
632 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
635 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
639 bus_child_pnpinfo_str(dev, pnp, 1024);
640 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
641 devaddq("+", tmp, dev);
651 * A device was removed from the tree. We are called just before this
655 devremoved(device_t dev)
660 pnp = kmalloc(1024, M_BUS, M_NOWAIT);
663 tmp = kmalloc(1024, M_BUS, M_NOWAIT);
667 bus_child_pnpinfo_str(dev, pnp, 1024);
668 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp);
669 devaddq("-", tmp, dev);
679 * Called when there's no match for this device. This is only called
680 * the first time that no match happens, so we don't keep getitng this
681 * message. Should that prove to be undesirable, we can change it.
682 * This is called when all drivers that can attach to a given bus
683 * decline to accept this device. Other errrors may not be detected.
686 devnomatch(device_t dev)
688 devaddq("?", "", dev);
692 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS)
694 struct dev_event_info *n1;
697 dis = devctl_disable;
698 error = sysctl_handle_int(oidp, &dis, 0, req);
699 if (error || !req->newptr)
701 lockmgr(&devsoftc.lock, LK_EXCLUSIVE);
702 devctl_disable = dis;
704 while (!TAILQ_EMPTY(&devsoftc.devq)) {
705 n1 = TAILQ_FIRST(&devsoftc.devq);
706 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
707 kfree(n1->dei_data, M_BUS);
711 lockmgr(&devsoftc.lock, LK_RELEASE);
715 /* End of /dev/devctl code */
717 TAILQ_HEAD(,bsd_device) bus_data_devices;
718 static int bus_data_generation = 1;
720 kobj_method_t null_methods[] = {
724 DEFINE_CLASS(null, null_methods, 0);
727 * Devclass implementation
730 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
733 devclass_find_internal(const char *classname, const char *parentname,
738 PDEBUG(("looking for %s", classname));
739 if (classname == NULL)
742 TAILQ_FOREACH(dc, &devclasses, link)
743 if (!strcmp(dc->name, classname))
747 PDEBUG(("creating %s", classname));
748 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1,
749 M_BUS, M_INTWAIT | M_ZERO);
751 dc->name = (char*) (dc + 1);
752 strcpy(dc->name, classname);
755 TAILQ_INIT(&dc->drivers);
756 TAILQ_INSERT_TAIL(&devclasses, dc, link);
758 bus_data_generation_update();
763 * If a parent class is specified, then set that as our parent so
764 * that this devclass will support drivers for the parent class as
765 * well. If the parent class has the same name don't do this though
766 * as it creates a cycle that can trigger an infinite loop in
767 * device_probe_child() if a device exists for which there is no
770 if (parentname && dc && !dc->parent &&
771 strcmp(classname, parentname) != 0)
772 dc->parent = devclass_find_internal(parentname, NULL, FALSE);
778 devclass_create(const char *classname)
780 return(devclass_find_internal(classname, NULL, TRUE));
784 devclass_find(const char *classname)
786 return(devclass_find_internal(classname, NULL, FALSE));
790 devclass_find_unit(const char *classname, int unit)
794 if ((dc = devclass_find(classname)) != NULL)
795 return(devclass_get_device(dc, unit));
800 devclass_add_driver(devclass_t dc, driver_t *driver)
806 PDEBUG(("%s", DRIVERNAME(driver)));
808 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
811 * Compile the driver's methods. Also increase the reference count
812 * so that the class doesn't get freed when the last instance
813 * goes. This means we can safely use static methods and avoids a
814 * double-free in devclass_delete_driver.
816 kobj_class_instantiate(driver);
819 * Make sure the devclass which the driver is implementing exists.
821 devclass_find_internal(driver->name, NULL, TRUE);
824 TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
827 * Call BUS_DRIVER_ADDED for any existing busses in this class,
828 * but only if the bus has already been attached (otherwise we
829 * might probe too early).
831 * This is what will cause a newly loaded module to be associated
832 * with hardware. bus_generic_driver_added() is typically what ends
835 for (i = 0; i < dc->maxunit; i++) {
836 if ((dev = dc->devices[i]) != NULL) {
837 if (dev->state >= DS_ATTACHED)
838 BUS_DRIVER_ADDED(dev, driver);
842 bus_data_generation_update();
847 devclass_delete_driver(devclass_t busclass, driver_t *driver)
849 devclass_t dc = devclass_find(driver->name);
855 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
861 * Find the link structure in the bus' list of drivers.
863 TAILQ_FOREACH(dl, &busclass->drivers, link)
864 if (dl->driver == driver)
868 PDEBUG(("%s not found in %s list", driver->name, busclass->name));
873 * Disassociate from any devices. We iterate through all the
874 * devices in the devclass of the driver and detach any which are
875 * using the driver and which have a parent in the devclass which
876 * we are deleting from.
878 * Note that since a driver can be in multiple devclasses, we
879 * should not detach devices which are not children of devices in
880 * the affected devclass.
882 for (i = 0; i < dc->maxunit; i++)
883 if (dc->devices[i]) {
884 dev = dc->devices[i];
885 if (dev->driver == driver && dev->parent &&
886 dev->parent->devclass == busclass) {
887 if ((error = device_detach(dev)) != 0)
889 device_set_driver(dev, NULL);
893 TAILQ_REMOVE(&busclass->drivers, dl, link);
896 kobj_class_uninstantiate(driver);
898 bus_data_generation_update();
903 devclass_find_driver_internal(devclass_t dc, const char *classname)
907 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
909 TAILQ_FOREACH(dl, &dc->drivers, link)
910 if (!strcmp(dl->driver->name, classname))
913 PDEBUG(("not found"));
918 devclass_find_driver(devclass_t dc, const char *classname)
922 dl = devclass_find_driver_internal(dc, classname);
930 devclass_get_name(devclass_t dc)
936 devclass_get_device(devclass_t dc, int unit)
938 if (dc == NULL || unit < 0 || unit >= dc->maxunit)
940 return(dc->devices[unit]);
944 devclass_get_softc(devclass_t dc, int unit)
948 dev = devclass_get_device(dc, unit);
952 return(device_get_softc(dev));
956 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
963 for (i = 0; i < dc->maxunit; i++)
967 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
970 for (i = 0; i < dc->maxunit; i++)
971 if (dc->devices[i]) {
972 list[count] = dc->devices[i];
983 * @brief Get a list of drivers in the devclass
985 * An array containing a list of pointers to all the drivers in the
986 * given devclass is allocated and returned in @p *listp. The number
987 * of drivers in the array is returned in @p *countp. The caller should
988 * free the array using @c free(p, M_TEMP).
990 * @param dc the devclass to examine
991 * @param listp gives location for array pointer return value
992 * @param countp gives location for number of array elements
996 * @retval ENOMEM the array allocation failed
999 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp)
1006 TAILQ_FOREACH(dl, &dc->drivers, link)
1008 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT);
1013 TAILQ_FOREACH(dl, &dc->drivers, link) {
1014 list[count] = dl->driver;
1024 * @brief Get the number of devices in a devclass
1026 * @param dc the devclass to examine
1029 devclass_get_count(devclass_t dc)
1034 for (i = 0; i < dc->maxunit; i++)
1041 devclass_get_maxunit(devclass_t dc)
1043 return(dc->maxunit);
1047 devclass_set_parent(devclass_t dc, devclass_t pdc)
1053 devclass_get_parent(devclass_t dc)
1059 devclass_alloc_unit(devclass_t dc, int *unitp)
1063 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
1065 /* If we have been given a wired unit number, check for existing device */
1067 if (unit >= 0 && unit < dc->maxunit &&
1068 dc->devices[unit] != NULL) {
1070 kprintf("%s-: %s%d exists, using next available unit number\n",
1071 dc->name, dc->name, unit);
1072 /* find the next available slot */
1073 while (++unit < dc->maxunit && dc->devices[unit] != NULL)
1077 /* Unwired device, find the next available slot for it */
1079 while (unit < dc->maxunit && dc->devices[unit] != NULL)
1084 * We've selected a unit beyond the length of the table, so let's
1085 * extend the table to make room for all units up to and including
1088 if (unit >= dc->maxunit) {
1092 newsize = (unit + 1);
1093 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS,
1094 M_INTWAIT | M_ZERO);
1095 if (newlist == NULL)
1098 * WARNING: Due to gcc builtin optimization,
1099 * calling bcopy causes gcc to assume
1100 * that the source and destination args
1101 * cannot be NULL and optimize-away later
1102 * conditional tests to determine if dc->devices
1103 * is NULL. In this situation, in fact,
1104 * dc->devices CAN be NULL w/ maxunit == 0.
1109 sizeof(device_t) * dc->maxunit);
1110 kfree(dc->devices, M_BUS);
1112 dc->devices = newlist;
1113 dc->maxunit = newsize;
1115 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
1122 devclass_add_device(devclass_t dc, device_t dev)
1126 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
1128 buflen = strlen(dc->name) + 5;
1129 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
1130 if (dev->nameunit == NULL)
1133 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
1134 kfree(dev->nameunit, M_BUS);
1135 dev->nameunit = NULL;
1138 dc->devices[dev->unit] = dev;
1140 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
1146 devclass_delete_device(devclass_t dc, device_t dev)
1151 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
1153 if (dev->devclass != dc || dc->devices[dev->unit] != dev)
1154 panic("devclass_delete_device: inconsistent device class");
1155 dc->devices[dev->unit] = NULL;
1156 if (dev->flags & DF_WILDCARD)
1158 dev->devclass = NULL;
1159 kfree(dev->nameunit, M_BUS);
1160 dev->nameunit = NULL;
1166 make_device(device_t parent, const char *name, int unit)
1171 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
1174 dc = devclass_find_internal(name, NULL, TRUE);
1176 kprintf("make_device: can't find device class %s\n", name);
1182 dev = kmalloc(sizeof(struct bsd_device), M_BUS, M_INTWAIT | M_ZERO);
1186 dev->parent = parent;
1187 TAILQ_INIT(&dev->children);
1188 kobj_init((kobj_t) dev, &null_class);
1190 dev->devclass = NULL;
1192 dev->nameunit = NULL;
1196 dev->flags = DF_ENABLED;
1199 dev->flags |= DF_WILDCARD;
1201 dev->flags |= DF_FIXEDCLASS;
1202 if (devclass_add_device(dc, dev) != 0) {
1203 kobj_delete((kobj_t)dev, M_BUS);
1210 dev->state = DS_NOTPRESENT;
1212 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
1213 bus_data_generation_update();
1219 device_print_child(device_t dev, device_t child)
1223 if (device_is_alive(child))
1224 retval += BUS_PRINT_CHILD(dev, child);
1226 retval += device_printf(child, " not found\n");
1232 device_add_child(device_t dev, const char *name, int unit)
1234 return device_add_child_ordered(dev, 0, name, unit);
1238 device_add_child_ordered(device_t dev, int order, const char *name, int unit)
1243 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
1246 child = make_device(dev, name, unit);
1249 child->order = order;
1251 TAILQ_FOREACH(place, &dev->children, link) {
1252 if (place->order > order)
1258 * The device 'place' is the first device whose order is
1259 * greater than the new child.
1261 TAILQ_INSERT_BEFORE(place, child, link);
1264 * The new child's order is greater or equal to the order of
1265 * any existing device. Add the child to the tail of the list.
1267 TAILQ_INSERT_TAIL(&dev->children, child, link);
1270 bus_data_generation_update();
1275 device_delete_child(device_t dev, device_t child)
1278 device_t grandchild;
1280 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
1282 /* remove children first */
1283 while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
1284 error = device_delete_child(child, grandchild);
1289 if ((error = device_detach(child)) != 0)
1291 if (child->devclass)
1292 devclass_delete_device(child->devclass, child);
1293 TAILQ_REMOVE(&dev->children, child, link);
1294 TAILQ_REMOVE(&bus_data_devices, child, devlink);
1295 kobj_delete((kobj_t)child, M_BUS);
1297 bus_data_generation_update();
1302 * @brief Delete all children devices of the given device, if any.
1304 * This function deletes all children devices of the given device, if
1305 * any, using the device_delete_child() function for each device it
1306 * finds. If a child device cannot be deleted, this function will
1307 * return an error code.
1309 * @param dev the parent device
1312 * @retval non-zero a device would not detach
1315 device_delete_children(device_t dev)
1320 PDEBUG(("Deleting all children of %s", DEVICENAME(dev)));
1324 while ((child = TAILQ_FIRST(&dev->children)) != NULL) {
1325 error = device_delete_child(dev, child);
1327 PDEBUG(("Failed deleting %s", DEVICENAME(child)));
1335 * @brief Find a device given a unit number
1337 * This is similar to devclass_get_devices() but only searches for
1338 * devices which have @p dev as a parent.
1340 * @param dev the parent device to search
1341 * @param unit the unit number to search for. If the unit is -1,
1342 * return the first child of @p dev which has name
1343 * @p classname (that is, the one with the lowest unit.)
1345 * @returns the device with the given unit number or @c
1346 * NULL if there is no such device
1349 device_find_child(device_t dev, const char *classname, int unit)
1354 dc = devclass_find(classname);
1359 child = devclass_get_device(dc, unit);
1360 if (child && child->parent == dev)
1363 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) {
1364 child = devclass_get_device(dc, unit);
1365 if (child && child->parent == dev)
1373 first_matching_driver(devclass_t dc, device_t dev)
1376 return(devclass_find_driver_internal(dc, dev->devclass->name));
1378 return(TAILQ_FIRST(&dc->drivers));
1382 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
1384 if (dev->devclass) {
1386 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
1387 if (!strcmp(dev->devclass->name, dl->driver->name))
1391 return(TAILQ_NEXT(last, link));
1395 device_probe_child(device_t dev, device_t child)
1398 driverlink_t best = NULL;
1400 int result, pri = 0;
1401 int hasclass = (child->devclass != NULL);
1405 panic("device_probe_child: parent device has no devclass");
1407 if (child->state == DS_ALIVE)
1410 for (; dc; dc = dc->parent) {
1411 for (dl = first_matching_driver(dc, child); dl;
1412 dl = next_matching_driver(dc, child, dl)) {
1413 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1414 device_set_driver(child, dl->driver);
1416 device_set_devclass(child, dl->driver->name);
1417 result = DEVICE_PROBE(child);
1419 device_set_devclass(child, 0);
1422 * If the driver returns SUCCESS, there can be
1423 * no higher match for this device.
1432 * The driver returned an error so it
1433 * certainly doesn't match.
1436 device_set_driver(child, NULL);
1441 * A priority lower than SUCCESS, remember the
1442 * best matching driver. Initialise the value
1443 * of pri for the first match.
1445 if (best == NULL || result > pri) {
1452 * If we have unambiguous match in this devclass,
1453 * don't look in the parent.
1455 if (best && pri == 0)
1460 * If we found a driver, change state and initialise the devclass.
1463 if (!child->devclass)
1464 device_set_devclass(child, best->driver->name);
1465 device_set_driver(child, best->driver);
1468 * A bit bogus. Call the probe method again to make
1469 * sure that we have the right description.
1471 DEVICE_PROBE(child);
1474 bus_data_generation_update();
1475 child->state = DS_ALIVE;
1483 device_probe_child_gpri(device_t dev, device_t child, u_int gpri)
1486 driverlink_t best = NULL;
1488 int result, pri = 0;
1489 int hasclass = (child->devclass != NULL);
1493 panic("device_probe_child: parent device has no devclass");
1495 if (child->state == DS_ALIVE)
1498 for (; dc; dc = dc->parent) {
1499 for (dl = first_matching_driver(dc, child); dl;
1500 dl = next_matching_driver(dc, child, dl)) {
1502 * GPRI handling, only probe drivers with the
1505 if (dl->driver->gpri != gpri)
1508 PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
1509 device_set_driver(child, dl->driver);
1511 device_set_devclass(child, dl->driver->name);
1512 result = DEVICE_PROBE(child);
1514 device_set_devclass(child, 0);
1517 * If the driver returns SUCCESS, there can be
1518 * no higher match for this device.
1527 * The driver returned an error so it
1528 * certainly doesn't match.
1531 device_set_driver(child, NULL);
1536 * A priority lower than SUCCESS, remember the
1537 * best matching driver. Initialise the value
1538 * of pri for the first match.
1540 if (best == NULL || result > pri) {
1547 * If we have unambiguous match in this devclass,
1548 * don't look in the parent.
1550 if (best && pri == 0)
1555 * If we found a driver, change state and initialise the devclass.
1558 if (!child->devclass)
1559 device_set_devclass(child, best->driver->name);
1560 device_set_driver(child, best->driver);
1563 * A bit bogus. Call the probe method again to make
1564 * sure that we have the right description.
1566 DEVICE_PROBE(child);
1569 bus_data_generation_update();
1570 child->state = DS_ALIVE;
1578 device_get_parent(device_t dev)
1584 device_get_children(device_t dev, device_t **devlistp, int *devcountp)
1591 TAILQ_FOREACH(child, &dev->children, link)
1594 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
1597 TAILQ_FOREACH(child, &dev->children, link) {
1598 list[count] = child;
1609 device_get_driver(device_t dev)
1611 return(dev->driver);
1615 device_get_devclass(device_t dev)
1617 return(dev->devclass);
1621 device_get_name(device_t dev)
1624 return devclass_get_name(dev->devclass);
1629 device_get_nameunit(device_t dev)
1631 return(dev->nameunit);
1635 device_get_unit(device_t dev)
1641 device_get_desc(device_t dev)
1647 device_get_flags(device_t dev)
1649 return(dev->devflags);
1652 struct sysctl_ctx_list *
1653 device_get_sysctl_ctx(device_t dev)
1655 return (&dev->sysctl_ctx);
1659 device_get_sysctl_tree(device_t dev)
1661 return (dev->sysctl_tree);
1665 device_print_prettyname(device_t dev)
1667 const char *name = device_get_name(dev);
1670 return kprintf("unknown: ");
1672 return kprintf("%s%d: ", name, device_get_unit(dev));
1676 device_printf(device_t dev, const char * fmt, ...)
1681 retval = device_print_prettyname(dev);
1682 __va_start(ap, fmt);
1683 retval += kvprintf(fmt, ap);
1689 device_set_desc_internal(device_t dev, const char* desc, int copy)
1691 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
1692 kfree(dev->desc, M_BUS);
1693 dev->flags &= ~DF_DESCMALLOCED;
1698 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
1700 strcpy(dev->desc, desc);
1701 dev->flags |= DF_DESCMALLOCED;
1704 /* Avoid a -Wcast-qual warning */
1705 dev->desc = (char *)(uintptr_t) desc;
1708 bus_data_generation_update();
1712 device_set_desc(device_t dev, const char* desc)
1714 device_set_desc_internal(dev, desc, FALSE);
1718 device_set_desc_copy(device_t dev, const char* desc)
1720 device_set_desc_internal(dev, desc, TRUE);
1724 device_set_flags(device_t dev, uint32_t flags)
1726 dev->devflags = flags;
1730 device_get_softc(device_t dev)
1736 device_set_softc(device_t dev, void *softc)
1738 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
1739 kfree(dev->softc, M_BUS);
1742 dev->flags |= DF_EXTERNALSOFTC;
1744 dev->flags &= ~DF_EXTERNALSOFTC;
1748 device_set_async_attach(device_t dev, int enable)
1751 dev->flags |= DF_ASYNCPROBE;
1753 dev->flags &= ~DF_ASYNCPROBE;
1757 device_get_ivars(device_t dev)
1763 device_set_ivars(device_t dev, void * ivars)
1772 device_get_state(device_t dev)
1778 device_enable(device_t dev)
1780 dev->flags |= DF_ENABLED;
1784 device_disable(device_t dev)
1786 dev->flags &= ~DF_ENABLED;
1793 device_busy(device_t dev)
1795 if (dev->state < DS_ATTACHED)
1796 panic("device_busy: called for unattached device");
1797 if (dev->busy == 0 && dev->parent)
1798 device_busy(dev->parent);
1800 dev->state = DS_BUSY;
1807 device_unbusy(device_t dev)
1809 if (dev->state != DS_BUSY)
1810 panic("device_unbusy: called for non-busy device");
1812 if (dev->busy == 0) {
1814 device_unbusy(dev->parent);
1815 dev->state = DS_ATTACHED;
1820 device_quiet(device_t dev)
1822 dev->flags |= DF_QUIET;
1826 device_verbose(device_t dev)
1828 dev->flags &= ~DF_QUIET;
1832 device_is_quiet(device_t dev)
1834 return((dev->flags & DF_QUIET) != 0);
1838 device_is_enabled(device_t dev)
1840 return((dev->flags & DF_ENABLED) != 0);
1844 device_is_alive(device_t dev)
1846 return(dev->state >= DS_ALIVE);
1850 device_is_attached(device_t dev)
1852 return(dev->state >= DS_ATTACHED);
1856 device_set_devclass(device_t dev, const char *classname)
1863 devclass_delete_device(dev->devclass, dev);
1867 if (dev->devclass) {
1868 kprintf("device_set_devclass: device class already set\n");
1872 dc = devclass_find_internal(classname, NULL, TRUE);
1876 error = devclass_add_device(dc, dev);
1878 bus_data_generation_update();
1883 device_set_driver(device_t dev, driver_t *driver)
1885 if (dev->state >= DS_ATTACHED)
1888 if (dev->driver == driver)
1891 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
1892 kfree(dev->softc, M_BUS);
1895 device_set_desc(dev, NULL);
1896 kobj_delete((kobj_t) dev, 0);
1897 dev->driver = driver;
1899 kobj_init((kobj_t) dev, (kobj_class_t) driver);
1900 if (!(dev->flags & DF_EXTERNALSOFTC))
1901 dev->softc = kmalloc(driver->size, M_BUS,
1902 M_INTWAIT | M_ZERO);
1904 kobj_init((kobj_t) dev, &null_class);
1907 bus_data_generation_update();
1912 device_probe_and_attach(device_t dev)
1914 device_t bus = dev->parent;
1917 if (dev->state >= DS_ALIVE)
1920 if ((dev->flags & DF_ENABLED) == 0) {
1922 device_print_prettyname(dev);
1923 kprintf("not probed (disabled)\n");
1928 error = device_probe_child(bus, dev);
1930 if (!(dev->flags & DF_DONENOMATCH)) {
1931 BUS_PROBE_NOMATCH(bus, dev);
1933 dev->flags |= DF_DONENOMATCH;
1939 * Output the exact device chain prior to the attach in case the
1940 * system locks up during attach, and generate the full info after
1941 * the attach so correct irq and other information is displayed.
1943 if (bootverbose && !device_is_quiet(dev)) {
1946 kprintf("%s", device_get_nameunit(dev));
1947 for (tmp = dev->parent; tmp; tmp = tmp->parent)
1948 kprintf(".%s", device_get_nameunit(tmp));
1951 if (!device_is_quiet(dev))
1952 device_print_child(bus, dev);
1953 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
1954 kprintf("%s: probing asynchronously\n",
1955 device_get_nameunit(dev));
1956 dev->state = DS_INPROGRESS;
1957 device_attach_async(dev);
1960 error = device_doattach(dev);
1966 device_probe_and_attach_gpri(device_t dev, u_int gpri)
1968 device_t bus = dev->parent;
1971 if (dev->state >= DS_ALIVE)
1974 if ((dev->flags & DF_ENABLED) == 0) {
1976 device_print_prettyname(dev);
1977 kprintf("not probed (disabled)\n");
1982 error = device_probe_child_gpri(bus, dev, gpri);
1985 if (!(dev->flags & DF_DONENOMATCH)) {
1986 BUS_PROBE_NOMATCH(bus, dev);
1988 dev->flags |= DF_DONENOMATCH;
1995 * Output the exact device chain prior to the attach in case the
1996 * system locks up during attach, and generate the full info after
1997 * the attach so correct irq and other information is displayed.
1999 if (bootverbose && !device_is_quiet(dev)) {
2002 kprintf("%s", device_get_nameunit(dev));
2003 for (tmp = dev->parent; tmp; tmp = tmp->parent)
2004 kprintf(".%s", device_get_nameunit(tmp));
2007 if (!device_is_quiet(dev))
2008 device_print_child(bus, dev);
2009 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) {
2010 kprintf("%s: probing asynchronously\n",
2011 device_get_nameunit(dev));
2012 dev->state = DS_INPROGRESS;
2013 device_attach_async(dev);
2016 error = device_doattach(dev);
2022 * Device is known to be alive, do the attach asynchronously.
2023 * However, serialize the attaches with the mp lock.
2026 device_attach_async(device_t dev)
2030 atomic_add_int(&numasyncthreads, 1);
2031 lwkt_create(device_attach_thread, dev, &td, NULL,
2032 0, 0, "%s", (dev->desc ? dev->desc : "devattach"));
2036 device_attach_thread(void *arg)
2040 (void)device_doattach(dev);
2041 atomic_subtract_int(&numasyncthreads, 1);
2042 wakeup(&numasyncthreads);
2046 * Device is known to be alive, do the attach (synchronous or asynchronous)
2049 device_doattach(device_t dev)
2051 device_t bus = dev->parent;
2052 int hasclass = (dev->devclass != NULL);
2055 device_sysctl_init(dev);
2056 error = DEVICE_ATTACH(dev);
2058 dev->state = DS_ATTACHED;
2059 if (bootverbose && !device_is_quiet(dev))
2060 device_print_child(bus, dev);
2061 device_sysctl_update(dev);
2064 kprintf("device_probe_and_attach: %s%d attach returned %d\n",
2065 dev->driver->name, dev->unit, error);
2066 /* Unset the class that was set in device_probe_child */
2068 device_set_devclass(dev, 0);
2069 device_set_driver(dev, NULL);
2070 dev->state = DS_NOTPRESENT;
2071 device_sysctl_fini(dev);
2077 device_detach(device_t dev)
2081 PDEBUG(("%s", DEVICENAME(dev)));
2082 if (dev->state == DS_BUSY)
2084 if (dev->state != DS_ATTACHED)
2087 if ((error = DEVICE_DETACH(dev)) != 0)
2090 device_printf(dev, "detached\n");
2092 BUS_CHILD_DETACHED(dev->parent, dev);
2094 if (!(dev->flags & DF_FIXEDCLASS))
2095 devclass_delete_device(dev->devclass, dev);
2097 dev->state = DS_NOTPRESENT;
2098 device_set_driver(dev, NULL);
2099 device_sysctl_fini(dev);
2105 device_shutdown(device_t dev)
2107 if (dev->state < DS_ATTACHED)
2109 PDEBUG(("%s", DEVICENAME(dev)));
2110 return DEVICE_SHUTDOWN(dev);
2114 device_set_unit(device_t dev, int unit)
2119 dc = device_get_devclass(dev);
2120 if (unit < dc->maxunit && dc->devices[unit])
2122 err = devclass_delete_device(dc, dev);
2126 err = devclass_add_device(dc, dev);
2130 bus_data_generation_update();
2134 /*======================================*/
2136 * Access functions for device resources.
2139 /* Supplied by config(8) in ioconf.c */
2140 extern struct config_device config_devtab[];
2141 extern int devtab_count;
2143 /* Runtime version */
2144 struct config_device *devtab = config_devtab;
2147 resource_new_name(const char *name, int unit)
2149 struct config_device *new;
2151 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP,
2152 M_INTWAIT | M_ZERO);
2153 if (devtab && devtab_count > 0)
2154 bcopy(devtab, new, devtab_count * sizeof(*new));
2155 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
2156 if (new[devtab_count].name == NULL) {
2160 strcpy(new[devtab_count].name, name);
2161 new[devtab_count].unit = unit;
2162 new[devtab_count].resource_count = 0;
2163 new[devtab_count].resources = NULL;
2164 if (devtab && devtab != config_devtab)
2165 kfree(devtab, M_TEMP);
2167 return devtab_count++;
2171 resource_new_resname(int j, const char *resname, resource_type type)
2173 struct config_resource *new;
2176 i = devtab[j].resource_count;
2177 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
2178 if (devtab[j].resources && i > 0)
2179 bcopy(devtab[j].resources, new, i * sizeof(*new));
2180 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
2181 if (new[i].name == NULL) {
2185 strcpy(new[i].name, resname);
2187 if (devtab[j].resources)
2188 kfree(devtab[j].resources, M_TEMP);
2189 devtab[j].resources = new;
2190 devtab[j].resource_count = i + 1;
2195 resource_match_string(int i, const char *resname, const char *value)
2198 struct config_resource *res;
2200 for (j = 0, res = devtab[i].resources;
2201 j < devtab[i].resource_count; j++, res++)
2202 if (!strcmp(res->name, resname)
2203 && res->type == RES_STRING
2204 && !strcmp(res->u.stringval, value))
2210 resource_find(const char *name, int unit, const char *resname,
2211 struct config_resource **result)
2214 struct config_resource *res;
2217 * First check specific instances, then generic.
2219 for (i = 0; i < devtab_count; i++) {
2220 if (devtab[i].unit < 0)
2222 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2223 res = devtab[i].resources;
2224 for (j = 0; j < devtab[i].resource_count; j++, res++)
2225 if (!strcmp(res->name, resname)) {
2231 for (i = 0; i < devtab_count; i++) {
2232 if (devtab[i].unit >= 0)
2234 /* XXX should this `&& devtab[i].unit == unit' be here? */
2235 /* XXX if so, then the generic match does nothing */
2236 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2237 res = devtab[i].resources;
2238 for (j = 0; j < devtab[i].resource_count; j++, res++)
2239 if (!strcmp(res->name, resname)) {
2249 resource_kenv(const char *name, int unit, const char *resname, long *result)
2255 * DragonFly style loader.conf hinting
2257 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname);
2258 if ((env = kgetenv(buf)) != NULL) {
2259 *result = strtol(env, NULL, 0);
2264 * Also support FreeBSD style loader.conf hinting
2266 ksnprintf(buf, sizeof(buf), "hint.%s.%d.%s", name, unit, resname);
2267 if ((env = kgetenv(buf)) != NULL) {
2268 *result = strtol(env, NULL, 0);
2276 resource_int_value(const char *name, int unit, const char *resname, int *result)
2278 struct config_resource *res;
2282 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
2283 *result = (int)kvalue;
2286 if ((error = resource_find(name, unit, resname, &res)) != 0)
2288 if (res->type != RES_INT)
2290 *result = res->u.intval;
2295 resource_long_value(const char *name, int unit, const char *resname,
2298 struct config_resource *res;
2302 if (resource_kenv(name, unit, resname, &kvalue) == 0) {
2306 if ((error = resource_find(name, unit, resname, &res)) != 0)
2308 if (res->type != RES_LONG)
2310 *result = res->u.longval;
2315 resource_string_value(const char *name, int unit, const char *resname,
2316 const char **result)
2319 struct config_resource *res;
2324 * DragonFly style loader.conf hinting
2326 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname);
2327 if ((env = kgetenv(buf)) != NULL) {
2333 * Also support FreeBSD style loader.conf hinting
2335 ksnprintf(buf, sizeof(buf), "hint.%s.%d.%s", name, unit, resname);
2336 if ((env = kgetenv(buf)) != NULL) {
2341 if ((error = resource_find(name, unit, resname, &res)) != 0)
2343 if (res->type != RES_STRING)
2345 *result = res->u.stringval;
2350 resource_query_string(int i, const char *resname, const char *value)
2356 for (; i < devtab_count; i++)
2357 if (resource_match_string(i, resname, value) >= 0)
2363 resource_locate(int i, const char *resname)
2369 for (; i < devtab_count; i++)
2370 if (!strcmp(devtab[i].name, resname))
2376 resource_count(void)
2378 return(devtab_count);
2382 resource_query_name(int i)
2384 return(devtab[i].name);
2388 resource_query_unit(int i)
2390 return(devtab[i].unit);
2394 resource_create(const char *name, int unit, const char *resname,
2395 resource_type type, struct config_resource **result)
2398 struct config_resource *res = NULL;
2400 for (i = 0; i < devtab_count; i++)
2401 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
2402 res = devtab[i].resources;
2406 i = resource_new_name(name, unit);
2409 res = devtab[i].resources;
2411 for (j = 0; j < devtab[i].resource_count; j++, res++)
2412 if (!strcmp(res->name, resname)) {
2416 j = resource_new_resname(i, resname, type);
2419 res = &devtab[i].resources[j];
2425 resource_set_int(const char *name, int unit, const char *resname, int value)
2428 struct config_resource *res;
2430 error = resource_create(name, unit, resname, RES_INT, &res);
2433 if (res->type != RES_INT)
2435 res->u.intval = value;
2440 resource_set_long(const char *name, int unit, const char *resname, long value)
2443 struct config_resource *res;
2445 error = resource_create(name, unit, resname, RES_LONG, &res);
2448 if (res->type != RES_LONG)
2450 res->u.longval = value;
2455 resource_set_string(const char *name, int unit, const char *resname,
2459 struct config_resource *res;
2461 error = resource_create(name, unit, resname, RES_STRING, &res);
2464 if (res->type != RES_STRING)
2466 if (res->u.stringval)
2467 kfree(res->u.stringval, M_TEMP);
2468 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
2469 if (res->u.stringval == NULL)
2471 strcpy(res->u.stringval, value);
2476 resource_cfgload(void *dummy __unused)
2478 struct config_resource *res, *cfgres;
2481 char *name, *resname;
2485 int config_devtab_count;
2487 config_devtab_count = devtab_count;
2491 for (i = 0; i < config_devtab_count; i++) {
2492 name = config_devtab[i].name;
2493 unit = config_devtab[i].unit;
2495 for (j = 0; j < config_devtab[i].resource_count; j++) {
2496 cfgres = config_devtab[i].resources;
2497 resname = cfgres[j].name;
2498 type = cfgres[j].type;
2499 error = resource_create(name, unit, resname, type,
2502 kprintf("create resource %s%d: error %d\n",
2506 if (res->type != type) {
2507 kprintf("type mismatch %s%d: %d != %d\n",
2508 name, unit, res->type, type);
2513 res->u.intval = cfgres[j].u.intval;
2516 res->u.longval = cfgres[j].u.longval;
2519 if (res->u.stringval)
2520 kfree(res->u.stringval, M_TEMP);
2521 stringval = cfgres[j].u.stringval;
2522 res->u.stringval = kmalloc(strlen(stringval) + 1,
2524 if (res->u.stringval == NULL)
2526 strcpy(res->u.stringval, stringval);
2529 panic("unknown resource type %d", type);
2534 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0);
2537 /*======================================*/
2539 * Some useful method implementations to make life easier for bus drivers.
2543 resource_list_init(struct resource_list *rl)
2549 resource_list_free(struct resource_list *rl)
2551 struct resource_list_entry *rle;
2553 while ((rle = SLIST_FIRST(rl)) != NULL) {
2555 panic("resource_list_free: resource entry is busy");
2556 SLIST_REMOVE_HEAD(rl, link);
2562 resource_list_add(struct resource_list *rl, int type, int rid,
2563 u_long start, u_long end, u_long count, int cpuid)
2565 struct resource_list_entry *rle;
2567 rle = resource_list_find(rl, type, rid);
2569 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS,
2571 SLIST_INSERT_HEAD(rl, rle, link);
2579 panic("resource_list_add: resource entry is busy");
2586 if (rle->cpuid != -1 && rle->cpuid != cpuid) {
2587 panic("resource_list_add: moving from cpu%d -> cpu%d",
2594 struct resource_list_entry*
2595 resource_list_find(struct resource_list *rl,
2598 struct resource_list_entry *rle;
2600 SLIST_FOREACH(rle, rl, link)
2601 if (rle->type == type && rle->rid == rid)
2607 resource_list_delete(struct resource_list *rl,
2610 struct resource_list_entry *rle = resource_list_find(rl, type, rid);
2613 if (rle->res != NULL)
2614 panic("resource_list_delete: resource has not been released");
2615 SLIST_REMOVE(rl, rle, resource_list_entry, link);
2621 resource_list_alloc(struct resource_list *rl,
2622 device_t bus, device_t child,
2624 u_long start, u_long end,
2625 u_long count, u_int flags, int cpuid)
2627 struct resource_list_entry *rle = NULL;
2628 int passthrough = (device_get_parent(child) != bus);
2629 int isdefault = (start == 0UL && end == ~0UL);
2632 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2634 start, end, count, flags, cpuid));
2637 rle = resource_list_find(rl, type, *rid);
2640 return(0); /* no resource of that type/rid */
2643 panic("resource_list_alloc: resource entry is busy");
2647 count = max(count, rle->count);
2648 end = max(rle->end, start + count - 1);
2652 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
2653 type, rid, start, end, count,
2657 * Record the new range.
2660 rle->start = rman_get_start(rle->res);
2661 rle->end = rman_get_end(rle->res);
2669 resource_list_release(struct resource_list *rl,
2670 device_t bus, device_t child,
2671 int type, int rid, struct resource *res)
2673 struct resource_list_entry *rle = NULL;
2674 int passthrough = (device_get_parent(child) != bus);
2678 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2682 rle = resource_list_find(rl, type, rid);
2685 panic("resource_list_release: can't find resource");
2687 panic("resource_list_release: resource entry is not busy");
2689 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2699 resource_list_print_type(struct resource_list *rl, const char *name, int type,
2702 struct resource_list_entry *rle;
2703 int printed, retval;
2707 /* Yes, this is kinda cheating */
2708 SLIST_FOREACH(rle, rl, link) {
2709 if (rle->type == type) {
2711 retval += kprintf(" %s ", name);
2713 retval += kprintf(",");
2715 retval += kprintf(format, rle->start);
2716 if (rle->count > 1) {
2717 retval += kprintf("-");
2718 retval += kprintf(format, rle->start +
2727 * Generic driver/device identify functions. These will install a device
2728 * rendezvous point under the parent using the same name as the driver
2729 * name, which will at a later time be probed and attached.
2731 * These functions are used when the parent does not 'scan' its bus for
2732 * matching devices, or for the particular devices using these functions,
2733 * or when the device is a pseudo or synthesized device (such as can be
2734 * found under firewire and ppbus).
2737 bus_generic_identify(driver_t *driver, device_t parent)
2739 if (parent->state == DS_ATTACHED)
2741 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1);
2746 bus_generic_identify_sameunit(driver_t *driver, device_t parent)
2748 if (parent->state == DS_ATTACHED)
2750 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent));
2755 * Call DEVICE_IDENTIFY for each driver.
2758 bus_generic_probe(device_t dev)
2760 devclass_t dc = dev->devclass;
2763 TAILQ_FOREACH(dl, &dc->drivers, link) {
2764 DEVICE_IDENTIFY(dl->driver, dev);
2771 * This is an aweful hack due to the isa bus and autoconf code not
2772 * probing the ISA devices until after everything else has configured.
2773 * The ISA bus did a dummy attach long ago so we have to set it back
2774 * to an earlier state so the probe thinks its the initial probe and
2777 * XXX remove by properly defering the ISA bus scan.
2780 bus_generic_probe_hack(device_t dev)
2782 if (dev->state == DS_ATTACHED) {
2783 dev->state = DS_ALIVE;
2784 bus_generic_probe(dev);
2785 dev->state = DS_ATTACHED;
2791 bus_generic_attach(device_t dev)
2795 TAILQ_FOREACH(child, &dev->children, link) {
2796 device_probe_and_attach(child);
2803 bus_generic_attach_gpri(device_t dev, u_int gpri)
2807 TAILQ_FOREACH(child, &dev->children, link) {
2808 device_probe_and_attach_gpri(child, gpri);
2815 bus_generic_detach(device_t dev)
2820 if (dev->state != DS_ATTACHED)
2823 TAILQ_FOREACH(child, &dev->children, link)
2824 if ((error = device_detach(child)) != 0)
2831 bus_generic_shutdown(device_t dev)
2835 TAILQ_FOREACH(child, &dev->children, link)
2836 device_shutdown(child);
2842 bus_generic_suspend(device_t dev)
2845 device_t child, child2;
2847 TAILQ_FOREACH(child, &dev->children, link) {
2848 error = DEVICE_SUSPEND(child);
2850 for (child2 = TAILQ_FIRST(&dev->children);
2851 child2 && child2 != child;
2852 child2 = TAILQ_NEXT(child2, link))
2853 DEVICE_RESUME(child2);
2861 bus_generic_resume(device_t dev)
2865 TAILQ_FOREACH(child, &dev->children, link)
2866 DEVICE_RESUME(child);
2867 /* if resume fails, there's nothing we can usefully do... */
2873 bus_print_child_header(device_t dev, device_t child)
2877 if (device_get_desc(child))
2878 retval += device_printf(child, "<%s>", device_get_desc(child));
2880 retval += kprintf("%s", device_get_nameunit(child));
2882 if (child->state != DS_ATTACHED)
2883 kprintf(" [tentative]");
2885 kprintf(" [attached!]");
2891 bus_print_child_footer(device_t dev, device_t child)
2893 return(kprintf(" on %s\n", device_get_nameunit(dev)));
2897 bus_generic_add_child(device_t dev, device_t child, int order,
2898 const char *name, int unit)
2901 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit);
2903 dev = device_add_child_ordered(child, order, name, unit);
2909 bus_generic_print_child(device_t dev, device_t child)
2913 retval += bus_print_child_header(dev, child);
2914 retval += bus_print_child_footer(dev, child);
2920 bus_generic_read_ivar(device_t dev, device_t child, int index,
2926 error = BUS_READ_IVAR(dev->parent, child, index, result);
2933 bus_generic_write_ivar(device_t dev, device_t child, int index,
2939 error = BUS_WRITE_IVAR(dev->parent, child, index, value);
2946 * Resource list are used for iterations, do not recurse.
2948 struct resource_list *
2949 bus_generic_get_resource_list(device_t dev, device_t child)
2955 bus_generic_driver_added(device_t dev, driver_t *driver)
2959 DEVICE_IDENTIFY(driver, dev);
2960 TAILQ_FOREACH(child, &dev->children, link) {
2961 if (child->state == DS_NOTPRESENT)
2962 device_probe_and_attach(child);
2967 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
2968 int flags, driver_intr_t *intr, void *arg, void **cookiep,
2969 lwkt_serialize_t serializer, const char *desc)
2971 /* Propagate up the bus hierarchy until someone handles it. */
2973 return BUS_SETUP_INTR(dev->parent, child, irq, flags,
2974 intr, arg, cookiep, serializer, desc);
2981 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
2984 /* Propagate up the bus hierarchy until someone handles it. */
2986 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
2992 bus_generic_disable_intr(device_t dev, device_t child, void *cookie)
2995 return(BUS_DISABLE_INTR(dev->parent, child, cookie));
3001 bus_generic_enable_intr(device_t dev, device_t child, void *cookie)
3004 BUS_ENABLE_INTR(dev->parent, child, cookie);
3008 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig,
3009 enum intr_polarity pol)
3011 /* Propagate up the bus hierarchy until someone handles it. */
3013 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol));
3019 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
3020 u_long start, u_long end, u_long count, u_int flags, int cpuid)
3022 /* Propagate up the bus hierarchy until someone handles it. */
3024 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
3025 start, end, count, flags, cpuid));
3031 bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
3034 /* Propagate up the bus hierarchy until someone handles it. */
3036 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
3042 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
3045 /* Propagate up the bus hierarchy until someone handles it. */
3047 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
3053 bus_generic_deactivate_resource(device_t dev, device_t child, int type,
3054 int rid, struct resource *r)
3056 /* Propagate up the bus hierarchy until someone handles it. */
3058 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
3065 bus_generic_get_resource(device_t dev, device_t child, int type, int rid,
3066 u_long *startp, u_long *countp)
3072 error = BUS_GET_RESOURCE(dev->parent, child, type, rid,
3079 bus_generic_set_resource(device_t dev, device_t child, int type, int rid,
3080 u_long start, u_long count, int cpuid)
3086 error = BUS_SET_RESOURCE(dev->parent, child, type, rid,
3087 start, count, cpuid);
3093 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid)
3096 BUS_DELETE_RESOURCE(dev, child, type, rid);
3100 * @brief Helper function for implementing BUS_GET_DMA_TAG().
3102 * This simple implementation of BUS_GET_DMA_TAG() simply calls the
3103 * BUS_GET_DMA_TAG() method of the parent of @p dev.
3106 bus_generic_get_dma_tag(device_t dev, device_t child)
3109 /* Propagate up the bus hierarchy until someone handles it. */
3110 if (dev->parent != NULL)
3111 return (BUS_GET_DMA_TAG(dev->parent, child));
3116 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
3117 u_long *startp, u_long *countp)
3119 struct resource_list *rl = NULL;
3120 struct resource_list_entry *rle = NULL;
3122 rl = BUS_GET_RESOURCE_LIST(dev, child);
3126 rle = resource_list_find(rl, type, rid);
3131 *startp = rle->start;
3133 *countp = rle->count;
3139 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
3140 u_long start, u_long count, int cpuid)
3142 struct resource_list *rl = NULL;
3144 rl = BUS_GET_RESOURCE_LIST(dev, child);
3148 resource_list_add(rl, type, rid, start, (start + count - 1), count,
3155 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
3157 struct resource_list *rl = NULL;
3159 rl = BUS_GET_RESOURCE_LIST(dev, child);
3163 resource_list_delete(rl, type, rid);
3167 bus_generic_rl_release_resource(device_t dev, device_t child, int type,
3168 int rid, struct resource *r)
3170 struct resource_list *rl = NULL;
3172 rl = BUS_GET_RESOURCE_LIST(dev, child);
3176 return(resource_list_release(rl, dev, child, type, rid, r));
3180 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
3181 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid)
3183 struct resource_list *rl = NULL;
3185 rl = BUS_GET_RESOURCE_LIST(dev, child);
3189 return(resource_list_alloc(rl, dev, child, type, rid,
3190 start, end, count, flags, cpuid));
3194 bus_generic_child_present(device_t bus, device_t child)
3196 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
3201 * Some convenience functions to make it easier for drivers to use the
3202 * resource-management functions. All these really do is hide the
3203 * indirection through the parent's method table, making for slightly
3204 * less-wordy code. In the future, it might make sense for this code
3205 * to maintain some sort of a list of resources allocated by each device.
3208 bus_alloc_resources(device_t dev, struct resource_spec *rs,
3209 struct resource **res)
3213 for (i = 0; rs[i].type != -1; i++)
3215 for (i = 0; rs[i].type != -1; i++) {
3216 res[i] = bus_alloc_resource_any(dev,
3217 rs[i].type, &rs[i].rid, rs[i].flags);
3218 if (res[i] == NULL) {
3219 bus_release_resources(dev, rs, res);
3227 bus_release_resources(device_t dev, const struct resource_spec *rs,
3228 struct resource **res)
3232 for (i = 0; rs[i].type != -1; i++)
3233 if (res[i] != NULL) {
3234 bus_release_resource(
3235 dev, rs[i].type, rs[i].rid, res[i]);
3241 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
3242 u_long count, u_int flags)
3244 if (dev->parent == NULL)
3246 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
3251 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags)
3253 if (dev->parent == NULL)
3255 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid,
3256 irq, irq, 1, flags, machintr_legacy_intr_cpuid(irq));
3260 bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
3262 if (dev->parent == NULL)
3264 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
3268 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
3270 if (dev->parent == NULL)
3272 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
3276 bus_release_resource(device_t dev, int type, int rid, struct resource *r)
3278 if (dev->parent == NULL)
3280 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
3284 bus_setup_intr_descr(device_t dev, struct resource *r, int flags,
3285 driver_intr_t handler, void *arg, void **cookiep,
3286 lwkt_serialize_t serializer, const char *desc)
3288 if (dev->parent == NULL)
3290 return BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
3291 cookiep, serializer, desc);
3295 bus_setup_intr(device_t dev, struct resource *r, int flags,
3296 driver_intr_t handler, void *arg, void **cookiep,
3297 lwkt_serialize_t serializer)
3299 return bus_setup_intr_descr(dev, r, flags, handler, arg, cookiep,
3304 bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
3306 if (dev->parent == NULL)
3308 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
3312 bus_enable_intr(device_t dev, void *cookie)
3315 BUS_ENABLE_INTR(dev->parent, dev, cookie);
3319 bus_disable_intr(device_t dev, void *cookie)
3322 return(BUS_DISABLE_INTR(dev->parent, dev, cookie));
3328 bus_set_resource(device_t dev, int type, int rid,
3329 u_long start, u_long count, int cpuid)
3331 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
3332 start, count, cpuid));
3336 bus_get_resource(device_t dev, int type, int rid,
3337 u_long *startp, u_long *countp)
3339 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
3344 bus_get_resource_start(device_t dev, int type, int rid)
3346 u_long start, count;
3349 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
3357 bus_get_resource_count(device_t dev, int type, int rid)
3359 u_long start, count;
3362 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
3370 bus_delete_resource(device_t dev, int type, int rid)
3372 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
3376 bus_child_present(device_t child)
3378 return (BUS_CHILD_PRESENT(device_get_parent(child), child));
3382 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
3386 parent = device_get_parent(child);
3387 if (parent == NULL) {
3391 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
3395 bus_child_location_str(device_t child, char *buf, size_t buflen)
3399 parent = device_get_parent(child);
3400 if (parent == NULL) {
3404 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
3408 * @brief Wrapper function for BUS_GET_DMA_TAG().
3410 * This function simply calls the BUS_GET_DMA_TAG() method of the
3414 bus_get_dma_tag(device_t dev)
3418 parent = device_get_parent(dev);
3421 return (BUS_GET_DMA_TAG(parent, dev));
3425 root_print_child(device_t dev, device_t child)
3431 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
3432 void **cookiep, lwkt_serialize_t serializer, const char *desc)
3435 * If an interrupt mapping gets to here something bad has happened.
3437 panic("root_setup_intr");
3441 * If we get here, assume that the device is permanant and really is
3442 * present in the system. Removable bus drivers are expected to intercept
3443 * this call long before it gets here. We return -1 so that drivers that
3444 * really care can check vs -1 or some ERRNO returned higher in the food
3448 root_child_present(device_t dev, device_t child)
3454 * XXX NOTE! other defaults may be set in bus_if.m
3456 static kobj_method_t root_methods[] = {
3457 /* Device interface */
3458 KOBJMETHOD(device_shutdown, bus_generic_shutdown),
3459 KOBJMETHOD(device_suspend, bus_generic_suspend),
3460 KOBJMETHOD(device_resume, bus_generic_resume),
3463 KOBJMETHOD(bus_add_child, bus_generic_add_child),
3464 KOBJMETHOD(bus_print_child, root_print_child),
3465 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
3466 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
3467 KOBJMETHOD(bus_setup_intr, root_setup_intr),
3468 KOBJMETHOD(bus_child_present, root_child_present),
3473 static driver_t root_driver = {
3480 devclass_t root_devclass;
3483 root_bus_module_handler(module_t mod, int what, void* arg)
3487 TAILQ_INIT(&bus_data_devices);
3488 root_bus = make_device(NULL, "root", 0);
3489 root_bus->desc = "System root bus";
3490 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
3491 root_bus->driver = &root_driver;
3492 root_bus->state = DS_ALIVE;
3493 root_devclass = devclass_find_internal("root", NULL, FALSE);
3498 device_shutdown(root_bus);
3505 static moduledata_t root_bus_mod = {
3507 root_bus_module_handler,
3510 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
3513 root_bus_configure(void)
3521 * handle device_identify based device attachments to the root_bus
3522 * (typically nexus).
3524 bus_generic_probe(root_bus);
3527 * Probe and attach the devices under root_bus.
3529 TAILQ_FOREACH(dev, &root_bus->children, link) {
3530 device_probe_and_attach(dev);
3534 * Wait for all asynchronous attaches to complete. If we don't
3535 * our legacy ISA bus scan could steal device unit numbers or
3539 if (numasyncthreads)
3540 kprintf("Waiting for async drivers to attach\n");
3541 while (numasyncthreads > 0) {
3542 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK)
3544 if (warncount == 0) {
3545 kprintf("Warning: Still waiting for %d "
3546 "drivers to attach\n", numasyncthreads);
3547 } else if (warncount == -30) {
3548 kprintf("Giving up on %d drivers\n", numasyncthreads);
3552 root_bus->state = DS_ATTACHED;
3556 driver_module_handler(module_t mod, int what, void *arg)
3559 struct driver_module_data *dmd;
3560 devclass_t bus_devclass;
3561 kobj_class_t driver;
3562 const char *parentname;
3564 dmd = (struct driver_module_data *)arg;
3565 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
3570 if (dmd->dmd_chainevh)
3571 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3573 driver = dmd->dmd_driver;
3574 PDEBUG(("Loading module: driver %s on bus %s",
3575 DRIVERNAME(driver), dmd->dmd_busname));
3578 * If the driver has any base classes, make the
3579 * devclass inherit from the devclass of the driver's
3580 * first base class. This will allow the system to
3581 * search for drivers in both devclasses for children
3582 * of a device using this driver.
3584 if (driver->baseclasses)
3585 parentname = driver->baseclasses[0]->name;
3588 *dmd->dmd_devclass = devclass_find_internal(driver->name,
3591 error = devclass_add_driver(bus_devclass, driver);
3597 PDEBUG(("Unloading module: driver %s from bus %s",
3598 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
3599 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
3601 if (!error && dmd->dmd_chainevh)
3602 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
3612 * The _short versions avoid iteration by not calling anything that prints
3613 * more than oneliners. I love oneliners.
3617 print_device_short(device_t dev, int indent)
3622 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
3623 dev->unit, dev->desc,
3624 (dev->parent? "":"no "),
3625 (TAILQ_EMPTY(&dev->children)? "no ":""),
3626 (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
3627 (dev->flags&DF_FIXEDCLASS? "fixed,":""),
3628 (dev->flags&DF_WILDCARD? "wildcard,":""),
3629 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
3630 (dev->ivars? "":"no "),
3631 (dev->softc? "":"no "),
3636 print_device(device_t dev, int indent)
3641 print_device_short(dev, indent);
3643 indentprintf(("Parent:\n"));
3644 print_device_short(dev->parent, indent+1);
3645 indentprintf(("Driver:\n"));
3646 print_driver_short(dev->driver, indent+1);
3647 indentprintf(("Devclass:\n"));
3648 print_devclass_short(dev->devclass, indent+1);
3652 * Print the device and all its children (indented).
3655 print_device_tree_short(device_t dev, int indent)
3662 print_device_short(dev, indent);
3664 TAILQ_FOREACH(child, &dev->children, link)
3665 print_device_tree_short(child, indent+1);
3669 * Print the device and all its children (indented).
3672 print_device_tree(device_t dev, int indent)
3679 print_device(dev, indent);
3681 TAILQ_FOREACH(child, &dev->children, link)
3682 print_device_tree(child, indent+1);
3686 print_driver_short(driver_t *driver, int indent)
3691 indentprintf(("driver %s: softc size = %zu\n",
3692 driver->name, driver->size));
3696 print_driver(driver_t *driver, int indent)
3701 print_driver_short(driver, indent);
3706 print_driver_list(driver_list_t drivers, int indent)
3708 driverlink_t driver;
3710 TAILQ_FOREACH(driver, &drivers, link)
3711 print_driver(driver->driver, indent);
3715 print_devclass_short(devclass_t dc, int indent)
3720 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
3724 print_devclass(devclass_t dc, int indent)
3731 print_devclass_short(dc, indent);
3732 indentprintf(("Drivers:\n"));
3733 print_driver_list(dc->drivers, indent+1);
3735 indentprintf(("Devices:\n"));
3736 for (i = 0; i < dc->maxunit; i++)
3738 print_device(dc->devices[i], indent+1);
3742 print_devclass_list_short(void)
3746 kprintf("Short listing of devclasses, drivers & devices:\n");
3747 TAILQ_FOREACH(dc, &devclasses, link) {
3748 print_devclass_short(dc, 0);
3753 print_devclass_list(void)
3757 kprintf("Full listing of devclasses, drivers & devices:\n");
3758 TAILQ_FOREACH(dc, &devclasses, link) {
3759 print_devclass(dc, 0);
3766 * Check to see if a device is disabled via a disabled hint.
3769 resource_disabled(const char *name, int unit)
3773 error = resource_int_value(name, unit, "disabled", &value);
3780 * User-space access to the device tree.
3782 * We implement a small set of nodes:
3784 * hw.bus Single integer read method to obtain the
3785 * current generation count.
3786 * hw.bus.devices Reads the entire device tree in flat space.
3787 * hw.bus.rman Resource manager interface
3789 * We might like to add the ability to scan devclasses and/or drivers to
3790 * determine what else is currently loaded/available.
3794 sysctl_bus(SYSCTL_HANDLER_ARGS)
3796 struct u_businfo ubus;
3798 ubus.ub_version = BUS_USER_VERSION;
3799 ubus.ub_generation = bus_data_generation;
3801 return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
3803 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
3804 "bus-related data");
3807 sysctl_devices(SYSCTL_HANDLER_ARGS)
3809 int *name = (int *)arg1;
3810 u_int namelen = arg2;
3813 struct u_device udev; /* XXX this is a bit big */
3819 if (bus_data_generation_check(name[0]))
3825 * Scan the list of devices, looking for the requested index.
3827 TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
3835 * Populate the return array.
3837 bzero(&udev, sizeof(udev));
3838 udev.dv_handle = (uintptr_t)dev;
3839 udev.dv_parent = (uintptr_t)dev->parent;
3840 if (dev->nameunit != NULL)
3841 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
3842 if (dev->desc != NULL)
3843 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
3844 if (dev->driver != NULL && dev->driver->name != NULL)
3845 strlcpy(udev.dv_drivername, dev->driver->name,
3846 sizeof(udev.dv_drivername));
3847 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
3848 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
3849 udev.dv_devflags = dev->devflags;
3850 udev.dv_flags = dev->flags;
3851 udev.dv_state = dev->state;
3852 error = SYSCTL_OUT(req, &udev, sizeof(udev));
3856 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
3857 "system device tree");
3860 bus_data_generation_check(int generation)
3862 if (generation != bus_data_generation)
3865 /* XXX generate optimised lists here? */
3870 bus_data_generation_update(void)
3872 bus_data_generation++;
3876 intr_str_polarity(enum intr_polarity pola)
3879 case INTR_POLARITY_LOW:
3882 case INTR_POLARITY_HIGH:
3885 case INTR_POLARITY_CONFORM:
3892 intr_str_trigger(enum intr_trigger trig)
3895 case INTR_TRIGGER_EDGE:
3898 case INTR_TRIGGER_LEVEL:
3901 case INTR_TRIGGER_CONFORM:
3908 device_getenv_int(device_t dev, const char *knob, int def)
3912 /* Deprecated; for compat */
3913 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob);
3914 kgetenv_int(env, &def);
3916 /* Prefer dev.driver.unit.knob */
3917 ksnprintf(env, sizeof(env), "dev.%s.%d.%s",
3918 device_get_name(dev), device_get_unit(dev), knob);
3919 kgetenv_int(env, &def);
3925 device_getenv_string(device_t dev, const char *knob, char * __restrict data,
3926 int dlen, const char * __restrict def)
3930 strlcpy(data, def, dlen);
3932 /* Deprecated; for compat */
3933 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob);
3934 kgetenv_string(env, data, dlen);
3936 /* Prefer dev.driver.unit.knob */
3937 ksnprintf(env, sizeof(env), "dev.%s.%d.%s",
3938 device_get_name(dev), device_get_unit(dev), knob);
3939 kgetenv_string(env, data, dlen);