2 * Dynamic device configuration and creation.
4 * Copyright (c) 2009 CodeSourcery
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 /* The theory here is that it should be possible to create a machine without
21 knowledge of specific devices. Historically board init routines have
22 passed a bunch of arguments to each device, requiring the board know
23 exactly which device it is dealing with. This file provides an abstract
24 API for device configuration and initialization. Devices will generally
25 inherit from a particular bus (e.g. PCI or I2C) rather than
29 #include "hw/fw-path-provider.h"
30 #include "sysemu/sysemu.h"
31 #include "qapi/error.h"
32 #include "qapi/qmp/qerror.h"
33 #include "qapi/visitor.h"
34 #include "qapi/qmp/qjson.h"
35 #include "hw/hotplug.h"
36 #include "hw/boards.h"
37 #include "qapi-event.h"
40 static bool qdev_hot_added = false;
41 static bool qdev_hot_removed = false;
43 const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
45 DeviceClass *dc = DEVICE_GET_CLASS(dev);
49 const char *qdev_fw_name(DeviceState *dev)
51 DeviceClass *dc = DEVICE_GET_CLASS(dev);
57 return object_get_typename(OBJECT(dev));
60 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
63 static void bus_remove_child(BusState *bus, DeviceState *child)
67 QTAILQ_FOREACH(kid, &bus->children, sibling) {
68 if (kid->child == child) {
71 snprintf(name, sizeof(name), "child[%d]", kid->index);
72 QTAILQ_REMOVE(&bus->children, kid, sibling);
74 /* This gives back ownership of kid->child back to us. */
75 object_property_del(OBJECT(bus), name, NULL);
76 object_unref(OBJECT(kid->child));
83 static void bus_add_child(BusState *bus, DeviceState *child)
86 BusChild *kid = g_malloc0(sizeof(*kid));
88 kid->index = bus->max_index++;
90 object_ref(OBJECT(kid->child));
92 QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
94 /* This transfers ownership of kid->child to the property. */
95 snprintf(name, sizeof(name), "child[%d]", kid->index);
96 object_property_add_link(OBJECT(bus), name,
97 object_get_typename(OBJECT(child)),
98 (Object **)&kid->child,
99 NULL, /* read-only property */
100 0, /* return ownership on prop deletion */
104 void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
106 dev->parent_bus = bus;
107 object_ref(OBJECT(bus));
108 bus_add_child(bus, dev);
111 static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
115 object_property_set_link(OBJECT(bus), OBJECT(handler),
116 QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
119 void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler, Error **errp)
121 qbus_set_hotplug_handler_internal(bus, OBJECT(handler), errp);
124 void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp)
126 qbus_set_hotplug_handler_internal(bus, OBJECT(bus), errp);
129 /* Create a new device. This only initializes the device state structure
130 and allows properties to be set. qdev_init should be called to
131 initialize the actual device emulation. */
132 DeviceState *qdev_create(BusState *bus, const char *name)
136 dev = qdev_try_create(bus, name);
139 error_report("Unknown device '%s' for bus '%s'", name,
140 object_get_typename(OBJECT(bus)));
142 error_report("Unknown device '%s' for default sysbus", name);
150 DeviceState *qdev_try_create(BusState *bus, const char *type)
154 if (object_class_by_name(type) == NULL) {
157 dev = DEVICE(object_new(type));
163 bus = sysbus_get_default();
166 qdev_set_parent_bus(dev, bus);
167 object_unref(OBJECT(dev));
171 /* Initialize a device. Device properties should be set before calling
172 this function. IRQs and MMIO regions should be connected/mapped after
173 calling this function.
174 On failure, destroy the device and return negative value.
175 Return 0 on success. */
176 int qdev_init(DeviceState *dev)
178 Error *local_err = NULL;
180 assert(!dev->realized);
182 object_property_set_bool(OBJECT(dev), true, "realized", &local_err);
183 if (local_err != NULL) {
184 qerror_report_err(local_err);
185 error_free(local_err);
186 object_unparent(OBJECT(dev));
192 static QTAILQ_HEAD(device_listeners, DeviceListener) device_listeners
193 = QTAILQ_HEAD_INITIALIZER(device_listeners);
195 enum ListenerDirection { Forward, Reverse };
197 #define DEVICE_LISTENER_CALL(_callback, _direction, _args...) \
199 DeviceListener *_listener; \
201 switch (_direction) { \
203 QTAILQ_FOREACH(_listener, &device_listeners, link) { \
204 if (_listener->_callback) { \
205 _listener->_callback(_listener, ##_args); \
210 QTAILQ_FOREACH_REVERSE(_listener, &device_listeners, \
211 device_listeners, link) { \
212 if (_listener->_callback) { \
213 _listener->_callback(_listener, ##_args); \
222 static int device_listener_add(DeviceState *dev, void *opaque)
224 DEVICE_LISTENER_CALL(realize, Forward, dev);
229 void device_listener_register(DeviceListener *listener)
231 QTAILQ_INSERT_TAIL(&device_listeners, listener, link);
233 qbus_walk_children(sysbus_get_default(), NULL, NULL, device_listener_add,
237 void device_listener_unregister(DeviceListener *listener)
239 QTAILQ_REMOVE(&device_listeners, listener, link);
242 static void device_realize(DeviceState *dev, Error **errp)
244 DeviceClass *dc = DEVICE_GET_CLASS(dev);
247 int rc = dc->init(dev);
249 error_setg(errp, "Device initialization failed.");
255 static void device_unrealize(DeviceState *dev, Error **errp)
257 DeviceClass *dc = DEVICE_GET_CLASS(dev);
260 int rc = dc->exit(dev);
262 error_setg(errp, "Device exit failed.");
268 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
269 int required_for_version)
271 assert(!dev->realized);
272 dev->instance_id_alias = alias_id;
273 dev->alias_required_for_version = required_for_version;
276 static HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
278 HotplugHandler *hotplug_ctrl = NULL;
280 if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
281 hotplug_ctrl = dev->parent_bus->hotplug_handler;
282 } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) {
283 MachineState *machine = MACHINE(qdev_get_machine());
284 MachineClass *mc = MACHINE_GET_CLASS(machine);
286 if (mc->get_hotplug_handler) {
287 hotplug_ctrl = mc->get_hotplug_handler(machine, dev);
293 void qdev_unplug(DeviceState *dev, Error **errp)
295 DeviceClass *dc = DEVICE_GET_CLASS(dev);
296 HotplugHandler *hotplug_ctrl;
297 HotplugHandlerClass *hdc;
299 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
300 error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
304 if (!dc->hotpluggable) {
305 error_set(errp, QERR_DEVICE_NO_HOTPLUG,
306 object_get_typename(OBJECT(dev)));
310 qdev_hot_removed = true;
312 hotplug_ctrl = qdev_get_hotplug_handler(dev);
313 /* hotpluggable device MUST have HotplugHandler, if it doesn't
314 * then something is very wrong with it */
315 g_assert(hotplug_ctrl);
317 /* If device supports async unplug just request it to be done,
318 * otherwise just remove it synchronously */
319 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
320 if (hdc->unplug_request) {
321 hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
323 hotplug_handler_unplug(hotplug_ctrl, dev, errp);
327 static int qdev_reset_one(DeviceState *dev, void *opaque)
334 static int qbus_reset_one(BusState *bus, void *opaque)
336 BusClass *bc = BUS_GET_CLASS(bus);
343 void qdev_reset_all(DeviceState *dev)
345 qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
348 void qbus_reset_all(BusState *bus)
350 qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
353 void qbus_reset_all_fn(void *opaque)
355 BusState *bus = opaque;
359 /* can be used as ->unplug() callback for the simple cases */
360 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
361 DeviceState *dev, Error **errp)
364 object_unparent(OBJECT(dev));
367 /* Like qdev_init(), but terminate program via error_report() instead of
368 returning an error value. This is okay during machine creation.
369 Don't use for hotplug, because there callers need to recover from
370 failure. Exception: if you know the device's init() callback can't
371 fail, then qdev_init_nofail() can't fail either, and is therefore
372 usable even then. But relying on the device implementation that
373 way is somewhat unclean, and best avoided. */
374 void qdev_init_nofail(DeviceState *dev)
378 assert(!dev->realized);
380 object_property_set_bool(OBJECT(dev), true, "realized", &err);
382 error_report("Initialization of device %s failed: %s",
383 object_get_typename(OBJECT(dev)),
384 error_get_pretty(err));
389 void qdev_machine_creation_done(void)
392 * ok, initial machine setup is done, starting from now we can
393 * only create hotpluggable devices
398 bool qdev_machine_modified(void)
400 return qdev_hot_added || qdev_hot_removed;
403 BusState *qdev_get_parent_bus(DeviceState *dev)
405 return dev->parent_bus;
408 static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev,
413 QLIST_FOREACH(ngl, &dev->gpios, node) {
414 /* NULL is a valid and matchable name, otherwise do a normal
417 if ((!ngl->name && !name) ||
418 (name && ngl->name && strcmp(name, ngl->name) == 0)) {
423 ngl = g_malloc0(sizeof(*ngl));
424 ngl->name = g_strdup(name);
425 QLIST_INSERT_HEAD(&dev->gpios, ngl, node);
429 void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
430 const char *name, int n)
433 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
434 char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-in");
436 assert(gpio_list->num_out == 0 || !name);
437 gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
440 for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) {
441 object_property_add_child(OBJECT(dev), propname,
442 OBJECT(gpio_list->in[i]), &error_abort);
446 gpio_list->num_in += n;
449 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
451 qdev_init_gpio_in_named(dev, handler, NULL, n);
454 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
455 const char *name, int n)
458 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
459 char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-out");
461 assert(gpio_list->num_in == 0 || !name);
462 gpio_list->num_out += n;
464 for (i = 0; i < n; ++i) {
465 memset(&pins[i], 0, sizeof(*pins));
466 object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
468 object_property_allow_set_link,
469 OBJ_PROP_LINK_UNREF_ON_RELEASE,
475 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
477 qdev_init_gpio_out_named(dev, pins, NULL, n);
480 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n)
482 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
484 assert(n >= 0 && n < gpio_list->num_in);
485 return gpio_list->in[n];
488 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
490 return qdev_get_gpio_in_named(dev, NULL, n);
493 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
496 char *propname = g_strdup_printf("%s[%d]",
497 name ? name : "unnamed-gpio-out", n);
499 /* We need a name for object_property_set_link to work. If the
500 * object has a parent, object_property_add_child will come back
501 * with an error without doing anything. If it has none, it will
502 * never fail. So we can just call it with a NULL Error pointer.
504 object_property_add_child(container_get(qdev_get_machine(),
506 "non-qdev-gpio[*]", OBJECT(pin), NULL);
508 object_property_set_link(OBJECT(dev), OBJECT(pin), propname, &error_abort);
512 qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n)
514 char *propname = g_strdup_printf("%s[%d]",
515 name ? name : "unnamed-gpio-out", n);
517 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
523 /* disconnect a GPIO ouput, returning the disconnected input (if any) */
525 static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
526 const char *name, int n)
528 char *propname = g_strdup_printf("%s[%d]",
529 name ? name : "unnamed-gpio-out", n);
531 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
534 object_property_set_link(OBJECT(dev), NULL, propname, NULL);
540 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
541 const char *name, int n)
543 qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
544 qdev_connect_gpio_out_named(dev, name, n, icpt);
548 void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
550 qdev_connect_gpio_out_named(dev, NULL, n, pin);
553 void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
557 NamedGPIOList *ngl = qdev_get_named_gpio_list(dev, name);
559 for (i = 0; i < ngl->num_in; i++) {
560 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-in";
561 char *propname = g_strdup_printf("%s[%d]", nm, i);
563 object_property_add_alias(OBJECT(container), propname,
564 OBJECT(dev), propname,
567 for (i = 0; i < ngl->num_out; i++) {
568 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-out";
569 char *propname = g_strdup_printf("%s[%d]", nm, i);
571 object_property_add_alias(OBJECT(container), propname,
572 OBJECT(dev), propname,
575 QLIST_REMOVE(ngl, node);
576 QLIST_INSERT_HEAD(&container->gpios, ngl, node);
579 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
583 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
584 if (strcmp(name, bus->name) == 0) {
591 int qbus_walk_children(BusState *bus,
592 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
593 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
600 err = pre_busfn(bus, opaque);
606 QTAILQ_FOREACH(kid, &bus->children, sibling) {
607 err = qdev_walk_children(kid->child,
608 pre_devfn, pre_busfn,
609 post_devfn, post_busfn, opaque);
616 err = post_busfn(bus, opaque);
625 int qdev_walk_children(DeviceState *dev,
626 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
627 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
634 err = pre_devfn(dev, opaque);
640 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
641 err = qbus_walk_children(bus, pre_devfn, pre_busfn,
642 post_devfn, post_busfn, opaque);
649 err = post_devfn(dev, opaque);
658 DeviceState *qdev_find_recursive(BusState *bus, const char *id)
664 QTAILQ_FOREACH(kid, &bus->children, sibling) {
665 DeviceState *dev = kid->child;
667 if (dev->id && strcmp(dev->id, id) == 0) {
671 QLIST_FOREACH(child, &dev->child_bus, sibling) {
672 ret = qdev_find_recursive(child, id);
681 static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
683 const char *typename = object_get_typename(OBJECT(bus));
688 bus->parent = parent;
691 bus->name = g_strdup(name);
692 } else if (bus->parent && bus->parent->id) {
693 /* parent device has id -> use it plus parent-bus-id for bus name */
694 bus_id = bus->parent->num_child_bus;
696 len = strlen(bus->parent->id) + 16;
698 snprintf(buf, len, "%s.%d", bus->parent->id, bus_id);
701 /* no id -> use lowercase bus type plus global bus-id for bus name */
702 bc = BUS_GET_CLASS(bus);
703 bus_id = bc->automatic_ids++;
705 len = strlen(typename) + 16;
707 len = snprintf(buf, len, "%s.%d", typename, bus_id);
708 for (i = 0; i < len; i++) {
709 buf[i] = qemu_tolower(buf[i]);
715 QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
716 bus->parent->num_child_bus++;
717 object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
718 object_unref(OBJECT(bus));
719 } else if (bus != sysbus_get_default()) {
720 /* TODO: once all bus devices are qdevified,
721 only reset handler for main_system_bus should be registered here. */
722 qemu_register_reset(qbus_reset_all_fn, bus);
726 static void bus_unparent(Object *obj)
728 BusState *bus = BUS(obj);
731 while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
732 DeviceState *dev = kid->child;
733 object_unparent(OBJECT(dev));
736 QLIST_REMOVE(bus, sibling);
737 bus->parent->num_child_bus--;
740 assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
741 qemu_unregister_reset(qbus_reset_all_fn, bus);
745 static bool bus_get_realized(Object *obj, Error **errp)
747 BusState *bus = BUS(obj);
749 return bus->realized;
752 static void bus_set_realized(Object *obj, bool value, Error **errp)
754 BusState *bus = BUS(obj);
755 BusClass *bc = BUS_GET_CLASS(bus);
757 Error *local_err = NULL;
759 if (value && !bus->realized) {
761 bc->realize(bus, &local_err);
764 /* TODO: recursive realization */
765 } else if (!value && bus->realized) {
766 QTAILQ_FOREACH(kid, &bus->children, sibling) {
767 DeviceState *dev = kid->child;
768 object_property_set_bool(OBJECT(dev), false, "realized",
770 if (local_err != NULL) {
774 if (bc->unrealize && local_err == NULL) {
775 bc->unrealize(bus, &local_err);
779 if (local_err != NULL) {
780 error_propagate(errp, local_err);
784 bus->realized = value;
787 void qbus_create_inplace(void *bus, size_t size, const char *typename,
788 DeviceState *parent, const char *name)
790 object_initialize(bus, size, typename);
791 qbus_realize(bus, parent, name);
794 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
798 bus = BUS(object_new(typename));
799 qbus_realize(bus, parent, name);
804 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
806 BusClass *bc = BUS_GET_CLASS(bus);
808 if (bc->get_fw_dev_path) {
809 return bc->get_fw_dev_path(dev);
815 static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
817 Object *obj = OBJECT(dev);
820 while (!d && obj->parent) {
822 d = fw_path_provider_try_get_dev_path(obj, bus, dev);
827 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
829 Object *obj = OBJECT(dev);
831 return fw_path_provider_try_get_dev_path(obj, bus, dev);
834 static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
838 if (dev && dev->parent_bus) {
840 l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
841 d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev);
843 d = bus_get_fw_dev_path(dev->parent_bus, dev);
846 l += snprintf(p + l, size - l, "%s", d);
852 l += snprintf(p + l , size - l, "/");
857 char* qdev_get_fw_dev_path(DeviceState *dev)
862 l = qdev_get_fw_dev_path_helper(dev, path, 128);
866 return g_strdup(path);
869 char *qdev_get_dev_path(DeviceState *dev)
873 if (!dev || !dev->parent_bus) {
877 bc = BUS_GET_CLASS(dev->parent_bus);
878 if (bc->get_dev_path) {
879 return bc->get_dev_path(dev);
886 * Legacy property handling
889 static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
890 const char *name, Error **errp)
892 DeviceState *dev = DEVICE(obj);
893 Property *prop = opaque;
898 prop->info->print(dev, prop, buffer, sizeof(buffer));
899 visit_type_str(v, &ptr, name, errp);
903 * @qdev_add_legacy_property - adds a legacy property
905 * Do not use this is new code! Properties added through this interface will
906 * be given names and types in the "legacy" namespace.
908 * Legacy properties are string versions of other OOM properties. The format
909 * of the string depends on the property type.
911 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
916 /* Register pointer properties as legacy properties */
917 if (!prop->info->print && prop->info->get) {
921 name = g_strdup_printf("legacy-%s", prop->name);
922 object_property_add(OBJECT(dev), name, "str",
923 prop->info->print ? qdev_get_legacy_property : prop->info->get,
932 * @qdev_property_add_static - add a @Property to a device.
934 * Static properties access data in a struct. The actual type of the
935 * property and the field depends on the property type.
937 void qdev_property_add_static(DeviceState *dev, Property *prop,
940 Error *local_err = NULL;
941 Object *obj = OBJECT(dev);
944 * TODO qdev_prop_ptr does not have getters or setters. It must
945 * go now that it can be replaced with links. The test should be
946 * removed along with it: all static properties are read/write.
948 if (!prop->info->get && !prop->info->set) {
952 object_property_add(obj, prop->name, prop->info->name,
953 prop->info->get, prop->info->set,
958 error_propagate(errp, local_err);
962 object_property_set_description(obj, prop->name,
963 prop->info->description,
966 if (prop->qtype == QTYPE_NONE) {
970 if (prop->qtype == QTYPE_QBOOL) {
971 object_property_set_bool(obj, prop->defval, prop->name, &error_abort);
972 } else if (prop->info->enum_table) {
973 object_property_set_str(obj, prop->info->enum_table[prop->defval],
974 prop->name, &error_abort);
975 } else if (prop->qtype == QTYPE_QINT) {
976 object_property_set_int(obj, prop->defval, prop->name, &error_abort);
980 /* @qdev_alias_all_properties - Add alias properties to the source object for
981 * all qdev properties on the target DeviceState.
983 void qdev_alias_all_properties(DeviceState *target, Object *source)
988 class = object_get_class(OBJECT(target));
990 DeviceClass *dc = DEVICE_CLASS(class);
992 for (prop = dc->props; prop && prop->name; prop++) {
993 object_property_add_alias(source, prop->name,
994 OBJECT(target), prop->name,
997 class = object_class_get_parent(class);
998 } while (class != object_class_by_name(TYPE_DEVICE));
1001 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
1003 GSList **list = opaque;
1004 DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
1011 if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) {
1012 *list = g_slist_append(*list, dev);
1018 GSList *qdev_build_hotpluggable_device_list(Object *peripheral)
1020 GSList *list = NULL;
1022 object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list);
1027 static bool device_get_realized(Object *obj, Error **errp)
1029 DeviceState *dev = DEVICE(obj);
1030 return dev->realized;
1033 static void device_set_realized(Object *obj, bool value, Error **errp)
1035 DeviceState *dev = DEVICE(obj);
1036 DeviceClass *dc = DEVICE_GET_CLASS(dev);
1037 HotplugHandler *hotplug_ctrl;
1039 Error *local_err = NULL;
1041 if (dev->hotplugged && !dc->hotpluggable) {
1042 error_set(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
1046 if (value && !dev->realized) {
1048 static int unattached_count;
1049 gchar *name = g_strdup_printf("device[%d]", unattached_count++);
1051 object_property_add_child(container_get(qdev_get_machine(),
1053 name, obj, &error_abort);
1058 dc->realize(dev, &local_err);
1061 if (local_err != NULL) {
1065 DEVICE_LISTENER_CALL(realize, Forward, dev);
1067 hotplug_ctrl = qdev_get_hotplug_handler(dev);
1069 hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
1072 if (local_err != NULL) {
1073 goto post_realize_fail;
1076 if (qdev_get_vmsd(dev)) {
1077 vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
1078 dev->instance_id_alias,
1079 dev->alias_required_for_version);
1082 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1083 object_property_set_bool(OBJECT(bus), true, "realized",
1085 if (local_err != NULL) {
1086 goto child_realize_fail;
1089 if (dev->hotplugged) {
1092 dev->pending_deleted_event = false;
1093 } else if (!value && dev->realized) {
1094 Error **local_errp = NULL;
1095 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1096 local_errp = local_err ? NULL : &local_err;
1097 object_property_set_bool(OBJECT(bus), false, "realized",
1100 if (qdev_get_vmsd(dev)) {
1101 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1103 if (dc->unrealize) {
1104 local_errp = local_err ? NULL : &local_err;
1105 dc->unrealize(dev, local_errp);
1107 dev->pending_deleted_event = true;
1108 DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
1111 if (local_err != NULL) {
1115 dev->realized = value;
1119 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1120 object_property_set_bool(OBJECT(bus), false, "realized",
1124 if (qdev_get_vmsd(dev)) {
1125 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1129 if (dc->unrealize) {
1130 dc->unrealize(dev, NULL);
1134 error_propagate(errp, local_err);
1138 static bool device_get_hotpluggable(Object *obj, Error **errp)
1140 DeviceClass *dc = DEVICE_GET_CLASS(obj);
1141 DeviceState *dev = DEVICE(obj);
1143 return dc->hotpluggable && (dev->parent_bus == NULL ||
1144 qbus_is_hotpluggable(dev->parent_bus));
1147 static bool device_get_hotplugged(Object *obj, Error **err)
1149 DeviceState *dev = DEVICE(obj);
1151 return dev->hotplugged;
1154 static void device_set_hotplugged(Object *obj, bool value, Error **err)
1156 DeviceState *dev = DEVICE(obj);
1158 dev->hotplugged = value;
1161 static void device_initfn(Object *obj)
1163 DeviceState *dev = DEVICE(obj);
1168 dev->hotplugged = 1;
1169 qdev_hot_added = true;
1172 dev->instance_id_alias = -1;
1173 dev->realized = false;
1175 object_property_add_bool(obj, "realized",
1176 device_get_realized, device_set_realized, NULL);
1177 object_property_add_bool(obj, "hotpluggable",
1178 device_get_hotpluggable, NULL, NULL);
1179 object_property_add_bool(obj, "hotplugged",
1180 device_get_hotplugged, device_set_hotplugged,
1183 class = object_get_class(OBJECT(dev));
1185 for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
1186 qdev_property_add_legacy(dev, prop, &error_abort);
1187 qdev_property_add_static(dev, prop, &error_abort);
1189 class = object_class_get_parent(class);
1190 } while (class != object_class_by_name(TYPE_DEVICE));
1192 object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
1193 (Object **)&dev->parent_bus, NULL, 0,
1195 QLIST_INIT(&dev->gpios);
1198 static void device_post_init(Object *obj)
1200 qdev_prop_set_globals(DEVICE(obj));
1203 /* Unlink device from bus and free the structure. */
1204 static void device_finalize(Object *obj)
1206 NamedGPIOList *ngl, *next;
1208 DeviceState *dev = DEVICE(obj);
1209 qemu_opts_del(dev->opts);
1211 QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
1212 QLIST_REMOVE(ngl, node);
1213 qemu_free_irqs(ngl->in, ngl->num_in);
1216 /* ngl->out irqs are owned by the other end and should not be freed
1222 static void device_class_base_init(ObjectClass *class, void *data)
1224 DeviceClass *klass = DEVICE_CLASS(class);
1226 /* We explicitly look up properties in the superclasses,
1227 * so do not propagate them to the subclasses.
1229 klass->props = NULL;
1232 static void device_unparent(Object *obj)
1234 DeviceState *dev = DEVICE(obj);
1237 if (dev->realized) {
1238 object_property_set_bool(obj, false, "realized", NULL);
1240 while (dev->num_child_bus) {
1241 bus = QLIST_FIRST(&dev->child_bus);
1242 object_unparent(OBJECT(bus));
1244 if (dev->parent_bus) {
1245 bus_remove_child(dev->parent_bus, dev);
1246 object_unref(OBJECT(dev->parent_bus));
1247 dev->parent_bus = NULL;
1250 /* Only send event if the device had been completely realized */
1251 if (dev->pending_deleted_event) {
1252 gchar *path = object_get_canonical_path(OBJECT(dev));
1254 qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort);
1259 static void device_class_init(ObjectClass *class, void *data)
1261 DeviceClass *dc = DEVICE_CLASS(class);
1263 class->unparent = device_unparent;
1264 dc->realize = device_realize;
1265 dc->unrealize = device_unrealize;
1267 /* by default all devices were considered as hotpluggable,
1268 * so with intent to check it in generic qdev_unplug() /
1269 * device_set_realized() functions make every device
1270 * hotpluggable. Devices that shouldn't be hotpluggable,
1271 * should override it in their class_init()
1273 dc->hotpluggable = true;
1276 void device_reset(DeviceState *dev)
1278 DeviceClass *klass = DEVICE_GET_CLASS(dev);
1285 Object *qdev_get_machine(void)
1290 dev = container_get(object_get_root(), "/machine");
1296 static const TypeInfo device_type_info = {
1297 .name = TYPE_DEVICE,
1298 .parent = TYPE_OBJECT,
1299 .instance_size = sizeof(DeviceState),
1300 .instance_init = device_initfn,
1301 .instance_post_init = device_post_init,
1302 .instance_finalize = device_finalize,
1303 .class_base_init = device_class_base_init,
1304 .class_init = device_class_init,
1306 .class_size = sizeof(DeviceClass),
1309 static void qbus_initfn(Object *obj)
1311 BusState *bus = BUS(obj);
1313 QTAILQ_INIT(&bus->children);
1314 object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
1315 TYPE_HOTPLUG_HANDLER,
1316 (Object **)&bus->hotplug_handler,
1317 object_property_allow_set_link,
1318 OBJ_PROP_LINK_UNREF_ON_RELEASE,
1320 object_property_add_bool(obj, "realized",
1321 bus_get_realized, bus_set_realized, NULL);
1324 static char *default_bus_get_fw_dev_path(DeviceState *dev)
1326 return g_strdup(object_get_typename(OBJECT(dev)));
1329 static void bus_class_init(ObjectClass *class, void *data)
1331 BusClass *bc = BUS_CLASS(class);
1333 class->unparent = bus_unparent;
1334 bc->get_fw_dev_path = default_bus_get_fw_dev_path;
1337 static void qbus_finalize(Object *obj)
1339 BusState *bus = BUS(obj);
1341 g_free((char *)bus->name);
1344 static const TypeInfo bus_info = {
1346 .parent = TYPE_OBJECT,
1347 .instance_size = sizeof(BusState),
1349 .class_size = sizeof(BusClass),
1350 .instance_init = qbus_initfn,
1351 .instance_finalize = qbus_finalize,
1352 .class_init = bus_class_init,
1355 static void qdev_register_types(void)
1357 type_register_static(&bus_info);
1358 type_register_static(&device_type_info);
1361 type_init(qdev_register_types)