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
28 #include "qemu/osdep.h"
30 #include "hw/fw-path-provider.h"
31 #include "sysemu/sysemu.h"
32 #include "qapi/qmp/qerror.h"
33 #include "qapi/visitor.h"
34 #include "qapi/qmp/qjson.h"
35 #include "qemu/error-report.h"
36 #include "hw/hotplug.h"
37 #include "hw/boards.h"
38 #include "qapi-event.h"
41 static bool qdev_hot_added = false;
42 static bool qdev_hot_removed = false;
44 const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
46 DeviceClass *dc = DEVICE_GET_CLASS(dev);
50 const char *qdev_fw_name(DeviceState *dev)
52 DeviceClass *dc = DEVICE_GET_CLASS(dev);
58 return object_get_typename(OBJECT(dev));
61 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
64 static void bus_remove_child(BusState *bus, DeviceState *child)
68 QTAILQ_FOREACH(kid, &bus->children, sibling) {
69 if (kid->child == child) {
72 snprintf(name, sizeof(name), "child[%d]", kid->index);
73 QTAILQ_REMOVE(&bus->children, kid, sibling);
75 /* This gives back ownership of kid->child back to us. */
76 object_property_del(OBJECT(bus), name, NULL);
77 object_unref(OBJECT(kid->child));
84 static void bus_add_child(BusState *bus, DeviceState *child)
87 BusChild *kid = g_malloc0(sizeof(*kid));
89 kid->index = bus->max_index++;
91 object_ref(OBJECT(kid->child));
93 QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
95 /* This transfers ownership of kid->child to the property. */
96 snprintf(name, sizeof(name), "child[%d]", kid->index);
97 object_property_add_link(OBJECT(bus), name,
98 object_get_typename(OBJECT(child)),
99 (Object **)&kid->child,
100 NULL, /* read-only property */
101 0, /* return ownership on prop deletion */
105 void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
107 dev->parent_bus = bus;
108 object_ref(OBJECT(bus));
109 bus_add_child(bus, dev);
112 static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
116 object_property_set_link(OBJECT(bus), OBJECT(handler),
117 QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
120 void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler, Error **errp)
122 qbus_set_hotplug_handler_internal(bus, OBJECT(handler), errp);
125 void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp)
127 qbus_set_hotplug_handler_internal(bus, OBJECT(bus), errp);
130 /* Create a new device. This only initializes the device state
131 structure and allows properties to be set. The device still needs
132 to be realized. See qdev-core.h. */
133 DeviceState *qdev_create(BusState *bus, const char *name)
137 dev = qdev_try_create(bus, name);
140 error_report("Unknown device '%s' for bus '%s'", name,
141 object_get_typename(OBJECT(bus)));
143 error_report("Unknown device '%s' for default sysbus", name);
151 DeviceState *qdev_try_create(BusState *bus, const char *type)
155 if (object_class_by_name(type) == NULL) {
158 dev = DEVICE(object_new(type));
164 bus = sysbus_get_default();
167 qdev_set_parent_bus(dev, bus);
168 object_unref(OBJECT(dev));
172 static QTAILQ_HEAD(device_listeners, DeviceListener) device_listeners
173 = QTAILQ_HEAD_INITIALIZER(device_listeners);
175 enum ListenerDirection { Forward, Reverse };
177 #define DEVICE_LISTENER_CALL(_callback, _direction, _args...) \
179 DeviceListener *_listener; \
181 switch (_direction) { \
183 QTAILQ_FOREACH(_listener, &device_listeners, link) { \
184 if (_listener->_callback) { \
185 _listener->_callback(_listener, ##_args); \
190 QTAILQ_FOREACH_REVERSE(_listener, &device_listeners, \
191 device_listeners, link) { \
192 if (_listener->_callback) { \
193 _listener->_callback(_listener, ##_args); \
202 static int device_listener_add(DeviceState *dev, void *opaque)
204 DEVICE_LISTENER_CALL(realize, Forward, dev);
209 void device_listener_register(DeviceListener *listener)
211 QTAILQ_INSERT_TAIL(&device_listeners, listener, link);
213 qbus_walk_children(sysbus_get_default(), NULL, NULL, device_listener_add,
217 void device_listener_unregister(DeviceListener *listener)
219 QTAILQ_REMOVE(&device_listeners, listener, link);
222 static void device_realize(DeviceState *dev, Error **errp)
224 DeviceClass *dc = DEVICE_GET_CLASS(dev);
227 int rc = dc->init(dev);
229 error_setg(errp, "Device initialization failed.");
235 static void device_unrealize(DeviceState *dev, Error **errp)
237 DeviceClass *dc = DEVICE_GET_CLASS(dev);
240 int rc = dc->exit(dev);
242 error_setg(errp, "Device exit failed.");
248 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
249 int required_for_version)
251 assert(!dev->realized);
252 dev->instance_id_alias = alias_id;
253 dev->alias_required_for_version = required_for_version;
256 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
258 HotplugHandler *hotplug_ctrl = NULL;
260 if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
261 hotplug_ctrl = dev->parent_bus->hotplug_handler;
262 } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) {
263 MachineState *machine = MACHINE(qdev_get_machine());
264 MachineClass *mc = MACHINE_GET_CLASS(machine);
266 if (mc->get_hotplug_handler) {
267 hotplug_ctrl = mc->get_hotplug_handler(machine, dev);
273 void qdev_unplug(DeviceState *dev, Error **errp)
275 DeviceClass *dc = DEVICE_GET_CLASS(dev);
276 HotplugHandler *hotplug_ctrl;
277 HotplugHandlerClass *hdc;
279 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
280 error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
284 if (!dc->hotpluggable) {
285 error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
286 object_get_typename(OBJECT(dev)));
290 qdev_hot_removed = true;
292 hotplug_ctrl = qdev_get_hotplug_handler(dev);
293 /* hotpluggable device MUST have HotplugHandler, if it doesn't
294 * then something is very wrong with it */
295 g_assert(hotplug_ctrl);
297 /* If device supports async unplug just request it to be done,
298 * otherwise just remove it synchronously */
299 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
300 if (hdc->unplug_request) {
301 hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
303 hotplug_handler_unplug(hotplug_ctrl, dev, errp);
307 static int qdev_reset_one(DeviceState *dev, void *opaque)
314 static int qbus_reset_one(BusState *bus, void *opaque)
316 BusClass *bc = BUS_GET_CLASS(bus);
323 void qdev_reset_all(DeviceState *dev)
325 qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
328 void qdev_reset_all_fn(void *opaque)
330 qdev_reset_all(DEVICE(opaque));
333 void qbus_reset_all(BusState *bus)
335 qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
338 void qbus_reset_all_fn(void *opaque)
340 BusState *bus = opaque;
344 /* can be used as ->unplug() callback for the simple cases */
345 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
346 DeviceState *dev, Error **errp)
349 object_unparent(OBJECT(dev));
354 * Device properties should be set before calling this function. IRQs
355 * and MMIO regions should be connected/mapped after calling this
357 * On failure, report an error with error_report() and terminate the
358 * program. This is okay during machine creation. Don't use for
359 * hotplug, because there callers need to recover from failure.
360 * Exception: if you know the device's init() callback can't fail,
361 * then qdev_init_nofail() can't fail either, and is therefore usable
362 * even then. But relying on the device implementation that way is
363 * somewhat unclean, and best avoided.
365 void qdev_init_nofail(DeviceState *dev)
369 assert(!dev->realized);
371 object_property_set_bool(OBJECT(dev), true, "realized", &err);
373 error_reportf_err(err, "Initialization of device %s failed: ",
374 object_get_typename(OBJECT(dev)));
379 void qdev_machine_creation_done(void)
382 * ok, initial machine setup is done, starting from now we can
383 * only create hotpluggable devices
388 bool qdev_machine_modified(void)
390 return qdev_hot_added || qdev_hot_removed;
393 BusState *qdev_get_parent_bus(DeviceState *dev)
395 return dev->parent_bus;
398 static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev,
403 QLIST_FOREACH(ngl, &dev->gpios, node) {
404 /* NULL is a valid and matchable name, otherwise do a normal
407 if ((!ngl->name && !name) ||
408 (name && ngl->name && strcmp(name, ngl->name) == 0)) {
413 ngl = g_malloc0(sizeof(*ngl));
414 ngl->name = g_strdup(name);
415 QLIST_INSERT_HEAD(&dev->gpios, ngl, node);
419 void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
420 const char *name, int n)
423 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
425 assert(gpio_list->num_out == 0 || !name);
426 gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
430 name = "unnamed-gpio-in";
432 for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) {
433 gchar *propname = g_strdup_printf("%s[%u]", name, i);
435 object_property_add_child(OBJECT(dev), propname,
436 OBJECT(gpio_list->in[i]), &error_abort);
440 gpio_list->num_in += n;
443 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
445 qdev_init_gpio_in_named(dev, handler, NULL, n);
448 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
449 const char *name, int n)
452 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
454 assert(gpio_list->num_in == 0 || !name);
457 name = "unnamed-gpio-out";
459 memset(pins, 0, sizeof(*pins) * n);
460 for (i = 0; i < n; ++i) {
461 gchar *propname = g_strdup_printf("%s[%u]", name,
462 gpio_list->num_out + i);
464 object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
466 object_property_allow_set_link,
467 OBJ_PROP_LINK_UNREF_ON_RELEASE,
471 gpio_list->num_out += n;
474 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
476 qdev_init_gpio_out_named(dev, pins, NULL, n);
479 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n)
481 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
483 assert(n >= 0 && n < gpio_list->num_in);
484 return gpio_list->in[n];
487 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
489 return qdev_get_gpio_in_named(dev, NULL, n);
492 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
495 char *propname = g_strdup_printf("%s[%d]",
496 name ? name : "unnamed-gpio-out", n);
498 /* We need a name for object_property_set_link to work. If the
499 * object has a parent, object_property_add_child will come back
500 * with an error without doing anything. If it has none, it will
501 * never fail. So we can just call it with a NULL Error pointer.
503 object_property_add_child(container_get(qdev_get_machine(),
505 "non-qdev-gpio[*]", OBJECT(pin), NULL);
507 object_property_set_link(OBJECT(dev), OBJECT(pin), propname, &error_abort);
511 qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n)
513 char *propname = g_strdup_printf("%s[%d]",
514 name ? name : "unnamed-gpio-out", n);
516 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
522 /* disconnect a GPIO output, returning the disconnected input (if any) */
524 static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
525 const char *name, int n)
527 char *propname = g_strdup_printf("%s[%d]",
528 name ? name : "unnamed-gpio-out", n);
530 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
533 object_property_set_link(OBJECT(dev), NULL, propname, NULL);
539 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
540 const char *name, int n)
542 qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
543 qdev_connect_gpio_out_named(dev, name, n, icpt);
547 void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
549 qdev_connect_gpio_out_named(dev, NULL, n, pin);
552 void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
556 NamedGPIOList *ngl = qdev_get_named_gpio_list(dev, name);
558 for (i = 0; i < ngl->num_in; i++) {
559 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-in";
560 char *propname = g_strdup_printf("%s[%d]", nm, i);
562 object_property_add_alias(OBJECT(container), propname,
563 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,
576 QLIST_REMOVE(ngl, node);
577 QLIST_INSERT_HEAD(&container->gpios, ngl, node);
580 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
583 Object *child = object_resolve_path_component(OBJECT(dev), name);
585 bus = (BusState *)object_dynamic_cast(child, TYPE_BUS);
590 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
591 if (strcmp(name, bus->name) == 0) {
598 int qbus_walk_children(BusState *bus,
599 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
600 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
607 err = pre_busfn(bus, opaque);
613 QTAILQ_FOREACH(kid, &bus->children, sibling) {
614 err = qdev_walk_children(kid->child,
615 pre_devfn, pre_busfn,
616 post_devfn, post_busfn, opaque);
623 err = post_busfn(bus, opaque);
632 int qdev_walk_children(DeviceState *dev,
633 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
634 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
641 err = pre_devfn(dev, opaque);
647 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
648 err = qbus_walk_children(bus, pre_devfn, pre_busfn,
649 post_devfn, post_busfn, opaque);
656 err = post_devfn(dev, opaque);
665 DeviceState *qdev_find_recursive(BusState *bus, const char *id)
671 QTAILQ_FOREACH(kid, &bus->children, sibling) {
672 DeviceState *dev = kid->child;
674 if (dev->id && strcmp(dev->id, id) == 0) {
678 QLIST_FOREACH(child, &dev->child_bus, sibling) {
679 ret = qdev_find_recursive(child, id);
688 static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
690 const char *typename = object_get_typename(OBJECT(bus));
695 bus->parent = parent;
698 bus->name = g_strdup(name);
699 } else if (bus->parent && bus->parent->id) {
700 /* parent device has id -> use it plus parent-bus-id for bus name */
701 bus_id = bus->parent->num_child_bus;
703 len = strlen(bus->parent->id) + 16;
705 snprintf(buf, len, "%s.%d", bus->parent->id, bus_id);
708 /* no id -> use lowercase bus type plus global bus-id for bus name */
709 bc = BUS_GET_CLASS(bus);
710 bus_id = bc->automatic_ids++;
712 len = strlen(typename) + 16;
714 len = snprintf(buf, len, "%s.%d", typename, bus_id);
715 for (i = 0; i < len; i++) {
716 buf[i] = qemu_tolower(buf[i]);
722 QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
723 bus->parent->num_child_bus++;
724 object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
725 object_unref(OBJECT(bus));
726 } else if (bus != sysbus_get_default()) {
727 /* TODO: once all bus devices are qdevified,
728 only reset handler for main_system_bus should be registered here. */
729 qemu_register_reset(qbus_reset_all_fn, bus);
733 static void bus_unparent(Object *obj)
735 BusState *bus = BUS(obj);
738 while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
739 DeviceState *dev = kid->child;
740 object_unparent(OBJECT(dev));
743 QLIST_REMOVE(bus, sibling);
744 bus->parent->num_child_bus--;
747 assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
748 qemu_unregister_reset(qbus_reset_all_fn, bus);
752 static bool bus_get_realized(Object *obj, Error **errp)
754 BusState *bus = BUS(obj);
756 return bus->realized;
759 static void bus_set_realized(Object *obj, bool value, Error **errp)
761 BusState *bus = BUS(obj);
762 BusClass *bc = BUS_GET_CLASS(bus);
764 Error *local_err = NULL;
766 if (value && !bus->realized) {
768 bc->realize(bus, &local_err);
771 /* TODO: recursive realization */
772 } else if (!value && bus->realized) {
773 QTAILQ_FOREACH(kid, &bus->children, sibling) {
774 DeviceState *dev = kid->child;
775 object_property_set_bool(OBJECT(dev), false, "realized",
777 if (local_err != NULL) {
781 if (bc->unrealize && local_err == NULL) {
782 bc->unrealize(bus, &local_err);
786 if (local_err != NULL) {
787 error_propagate(errp, local_err);
791 bus->realized = value;
794 void qbus_create_inplace(void *bus, size_t size, const char *typename,
795 DeviceState *parent, const char *name)
797 object_initialize(bus, size, typename);
798 qbus_realize(bus, parent, name);
801 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
805 bus = BUS(object_new(typename));
806 qbus_realize(bus, parent, name);
811 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
813 BusClass *bc = BUS_GET_CLASS(bus);
815 if (bc->get_fw_dev_path) {
816 return bc->get_fw_dev_path(dev);
822 static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
824 Object *obj = OBJECT(dev);
827 while (!d && obj->parent) {
829 d = fw_path_provider_try_get_dev_path(obj, bus, dev);
834 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
836 Object *obj = OBJECT(dev);
838 return fw_path_provider_try_get_dev_path(obj, bus, dev);
841 static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
845 if (dev && dev->parent_bus) {
847 l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
848 d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev);
850 d = bus_get_fw_dev_path(dev->parent_bus, dev);
853 l += snprintf(p + l, size - l, "%s", d);
859 l += snprintf(p + l , size - l, "/");
864 char* qdev_get_fw_dev_path(DeviceState *dev)
869 l = qdev_get_fw_dev_path_helper(dev, path, 128);
873 return g_strdup(path);
876 char *qdev_get_dev_path(DeviceState *dev)
880 if (!dev || !dev->parent_bus) {
884 bc = BUS_GET_CLASS(dev->parent_bus);
885 if (bc->get_dev_path) {
886 return bc->get_dev_path(dev);
893 * Legacy property handling
896 static void qdev_get_legacy_property(Object *obj, Visitor *v,
897 const char *name, void *opaque,
900 DeviceState *dev = DEVICE(obj);
901 Property *prop = opaque;
906 prop->info->print(dev, prop, buffer, sizeof(buffer));
907 visit_type_str(v, name, &ptr, errp);
911 * @qdev_add_legacy_property - adds a legacy property
913 * Do not use this is new code! Properties added through this interface will
914 * be given names and types in the "legacy" namespace.
916 * Legacy properties are string versions of other OOM properties. The format
917 * of the string depends on the property type.
919 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
924 /* Register pointer properties as legacy properties */
925 if (!prop->info->print && prop->info->get) {
929 name = g_strdup_printf("legacy-%s", prop->name);
930 object_property_add(OBJECT(dev), name, "str",
931 prop->info->print ? qdev_get_legacy_property : prop->info->get,
940 * @qdev_property_add_static - add a @Property to a device.
942 * Static properties access data in a struct. The actual type of the
943 * property and the field depends on the property type.
945 void qdev_property_add_static(DeviceState *dev, Property *prop,
948 Error *local_err = NULL;
949 Object *obj = OBJECT(dev);
952 * TODO qdev_prop_ptr does not have getters or setters. It must
953 * go now that it can be replaced with links. The test should be
954 * removed along with it: all static properties are read/write.
956 if (!prop->info->get && !prop->info->set) {
960 object_property_add(obj, prop->name, prop->info->name,
961 prop->info->get, prop->info->set,
966 error_propagate(errp, local_err);
970 object_property_set_description(obj, prop->name,
971 prop->info->description,
974 if (prop->qtype == QTYPE_NONE) {
978 if (prop->qtype == QTYPE_QBOOL) {
979 object_property_set_bool(obj, prop->defval, prop->name, &error_abort);
980 } else if (prop->info->enum_table) {
981 object_property_set_str(obj, prop->info->enum_table[prop->defval],
982 prop->name, &error_abort);
983 } else if (prop->qtype == QTYPE_QINT) {
984 object_property_set_int(obj, prop->defval, prop->name, &error_abort);
988 /* @qdev_alias_all_properties - Add alias properties to the source object for
989 * all qdev properties on the target DeviceState.
991 void qdev_alias_all_properties(DeviceState *target, Object *source)
996 class = object_get_class(OBJECT(target));
998 DeviceClass *dc = DEVICE_CLASS(class);
1000 for (prop = dc->props; prop && prop->name; prop++) {
1001 object_property_add_alias(source, prop->name,
1002 OBJECT(target), prop->name,
1005 class = object_class_get_parent(class);
1006 } while (class != object_class_by_name(TYPE_DEVICE));
1009 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
1011 GSList **list = opaque;
1012 DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
1019 if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) {
1020 *list = g_slist_append(*list, dev);
1026 GSList *qdev_build_hotpluggable_device_list(Object *peripheral)
1028 GSList *list = NULL;
1030 object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list);
1035 static bool device_get_realized(Object *obj, Error **errp)
1037 DeviceState *dev = DEVICE(obj);
1038 return dev->realized;
1041 static void device_set_realized(Object *obj, bool value, Error **errp)
1043 DeviceState *dev = DEVICE(obj);
1044 DeviceClass *dc = DEVICE_GET_CLASS(dev);
1045 HotplugHandler *hotplug_ctrl;
1047 Error *local_err = NULL;
1049 if (dev->hotplugged && !dc->hotpluggable) {
1050 error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
1054 if (value && !dev->realized) {
1056 static int unattached_count;
1057 gchar *name = g_strdup_printf("device[%d]", unattached_count++);
1059 object_property_add_child(container_get(qdev_get_machine(),
1061 name, obj, &error_abort);
1066 dc->realize(dev, &local_err);
1069 if (local_err != NULL) {
1073 DEVICE_LISTENER_CALL(realize, Forward, dev);
1075 hotplug_ctrl = qdev_get_hotplug_handler(dev);
1077 hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
1080 if (local_err != NULL) {
1081 goto post_realize_fail;
1084 if (qdev_get_vmsd(dev)) {
1085 vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
1086 dev->instance_id_alias,
1087 dev->alias_required_for_version);
1090 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1091 object_property_set_bool(OBJECT(bus), true, "realized",
1093 if (local_err != NULL) {
1094 goto child_realize_fail;
1097 if (dev->hotplugged) {
1100 dev->pending_deleted_event = false;
1101 } else if (!value && dev->realized) {
1102 Error **local_errp = NULL;
1103 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1104 local_errp = local_err ? NULL : &local_err;
1105 object_property_set_bool(OBJECT(bus), false, "realized",
1108 if (qdev_get_vmsd(dev)) {
1109 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1111 if (dc->unrealize) {
1112 local_errp = local_err ? NULL : &local_err;
1113 dc->unrealize(dev, local_errp);
1115 dev->pending_deleted_event = true;
1116 DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
1119 if (local_err != NULL) {
1123 dev->realized = value;
1127 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1128 object_property_set_bool(OBJECT(bus), false, "realized",
1132 if (qdev_get_vmsd(dev)) {
1133 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1137 if (dc->unrealize) {
1138 dc->unrealize(dev, NULL);
1142 error_propagate(errp, local_err);
1145 static bool device_get_hotpluggable(Object *obj, Error **errp)
1147 DeviceClass *dc = DEVICE_GET_CLASS(obj);
1148 DeviceState *dev = DEVICE(obj);
1150 return dc->hotpluggable && (dev->parent_bus == NULL ||
1151 qbus_is_hotpluggable(dev->parent_bus));
1154 static bool device_get_hotplugged(Object *obj, Error **err)
1156 DeviceState *dev = DEVICE(obj);
1158 return dev->hotplugged;
1161 static void device_set_hotplugged(Object *obj, bool value, Error **err)
1163 DeviceState *dev = DEVICE(obj);
1165 dev->hotplugged = value;
1168 static void device_initfn(Object *obj)
1170 DeviceState *dev = DEVICE(obj);
1175 dev->hotplugged = 1;
1176 qdev_hot_added = true;
1179 dev->instance_id_alias = -1;
1180 dev->realized = false;
1182 object_property_add_bool(obj, "realized",
1183 device_get_realized, device_set_realized, NULL);
1184 object_property_add_bool(obj, "hotpluggable",
1185 device_get_hotpluggable, NULL, NULL);
1186 object_property_add_bool(obj, "hotplugged",
1187 device_get_hotplugged, device_set_hotplugged,
1190 class = object_get_class(OBJECT(dev));
1192 for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
1193 qdev_property_add_legacy(dev, prop, &error_abort);
1194 qdev_property_add_static(dev, prop, &error_abort);
1196 class = object_class_get_parent(class);
1197 } while (class != object_class_by_name(TYPE_DEVICE));
1199 object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
1200 (Object **)&dev->parent_bus, NULL, 0,
1202 QLIST_INIT(&dev->gpios);
1205 static void device_post_init(Object *obj)
1207 qdev_prop_set_globals(DEVICE(obj));
1210 /* Unlink device from bus and free the structure. */
1211 static void device_finalize(Object *obj)
1213 NamedGPIOList *ngl, *next;
1215 DeviceState *dev = DEVICE(obj);
1217 QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
1218 QLIST_REMOVE(ngl, node);
1219 qemu_free_irqs(ngl->in, ngl->num_in);
1222 /* ngl->out irqs are owned by the other end and should not be freed
1228 static void device_class_base_init(ObjectClass *class, void *data)
1230 DeviceClass *klass = DEVICE_CLASS(class);
1232 /* We explicitly look up properties in the superclasses,
1233 * so do not propagate them to the subclasses.
1235 klass->props = NULL;
1238 static void device_unparent(Object *obj)
1240 DeviceState *dev = DEVICE(obj);
1243 if (dev->realized) {
1244 object_property_set_bool(obj, false, "realized", NULL);
1246 while (dev->num_child_bus) {
1247 bus = QLIST_FIRST(&dev->child_bus);
1248 object_unparent(OBJECT(bus));
1250 if (dev->parent_bus) {
1251 bus_remove_child(dev->parent_bus, dev);
1252 object_unref(OBJECT(dev->parent_bus));
1253 dev->parent_bus = NULL;
1256 /* Only send event if the device had been completely realized */
1257 if (dev->pending_deleted_event) {
1258 gchar *path = object_get_canonical_path(OBJECT(dev));
1260 qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort);
1264 qemu_opts_del(dev->opts);
1268 static void device_class_init(ObjectClass *class, void *data)
1270 DeviceClass *dc = DEVICE_CLASS(class);
1272 class->unparent = device_unparent;
1273 dc->realize = device_realize;
1274 dc->unrealize = device_unrealize;
1276 /* by default all devices were considered as hotpluggable,
1277 * so with intent to check it in generic qdev_unplug() /
1278 * device_set_realized() functions make every device
1279 * hotpluggable. Devices that shouldn't be hotpluggable,
1280 * should override it in their class_init()
1282 dc->hotpluggable = true;
1285 void device_reset(DeviceState *dev)
1287 DeviceClass *klass = DEVICE_GET_CLASS(dev);
1294 Object *qdev_get_machine(void)
1299 dev = container_get(object_get_root(), "/machine");
1305 static const TypeInfo device_type_info = {
1306 .name = TYPE_DEVICE,
1307 .parent = TYPE_OBJECT,
1308 .instance_size = sizeof(DeviceState),
1309 .instance_init = device_initfn,
1310 .instance_post_init = device_post_init,
1311 .instance_finalize = device_finalize,
1312 .class_base_init = device_class_base_init,
1313 .class_init = device_class_init,
1315 .class_size = sizeof(DeviceClass),
1318 static void qbus_initfn(Object *obj)
1320 BusState *bus = BUS(obj);
1322 QTAILQ_INIT(&bus->children);
1323 object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
1324 TYPE_HOTPLUG_HANDLER,
1325 (Object **)&bus->hotplug_handler,
1326 object_property_allow_set_link,
1327 OBJ_PROP_LINK_UNREF_ON_RELEASE,
1329 object_property_add_bool(obj, "realized",
1330 bus_get_realized, bus_set_realized, NULL);
1333 static char *default_bus_get_fw_dev_path(DeviceState *dev)
1335 return g_strdup(object_get_typename(OBJECT(dev)));
1338 static void bus_class_init(ObjectClass *class, void *data)
1340 BusClass *bc = BUS_CLASS(class);
1342 class->unparent = bus_unparent;
1343 bc->get_fw_dev_path = default_bus_get_fw_dev_path;
1346 static void qbus_finalize(Object *obj)
1348 BusState *bus = BUS(obj);
1350 g_free((char *)bus->name);
1353 static const TypeInfo bus_info = {
1355 .parent = TYPE_OBJECT,
1356 .instance_size = sizeof(BusState),
1358 .class_size = sizeof(BusClass),
1359 .instance_init = qbus_initfn,
1360 .instance_finalize = qbus_finalize,
1361 .class_init = bus_class_init,
1364 static void qdev_register_types(void)
1366 type_register_static(&bus_info);
1367 type_register_static(&device_type_info);
1370 type_init(qdev_register_types)