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 void device_realize(DeviceState *dev, Error **errp)
194 DeviceClass *dc = DEVICE_GET_CLASS(dev);
197 int rc = dc->init(dev);
199 error_setg(errp, "Device initialization failed.");
205 static void device_unrealize(DeviceState *dev, Error **errp)
207 DeviceClass *dc = DEVICE_GET_CLASS(dev);
210 int rc = dc->exit(dev);
212 error_setg(errp, "Device exit failed.");
218 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
219 int required_for_version)
221 assert(!dev->realized);
222 dev->instance_id_alias = alias_id;
223 dev->alias_required_for_version = required_for_version;
226 static HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
228 HotplugHandler *hotplug_ctrl = NULL;
230 if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
231 hotplug_ctrl = dev->parent_bus->hotplug_handler;
232 } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) {
233 MachineState *machine = MACHINE(qdev_get_machine());
234 MachineClass *mc = MACHINE_GET_CLASS(machine);
236 if (mc->get_hotplug_handler) {
237 hotplug_ctrl = mc->get_hotplug_handler(machine, dev);
243 void qdev_unplug(DeviceState *dev, Error **errp)
245 DeviceClass *dc = DEVICE_GET_CLASS(dev);
246 HotplugHandler *hotplug_ctrl;
247 HotplugHandlerClass *hdc;
249 if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
250 error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
254 if (!dc->hotpluggable) {
255 error_set(errp, QERR_DEVICE_NO_HOTPLUG,
256 object_get_typename(OBJECT(dev)));
260 qdev_hot_removed = true;
262 hotplug_ctrl = qdev_get_hotplug_handler(dev);
263 /* hotpluggable device MUST have HotplugHandler, if it doesn't
264 * then something is very wrong with it */
265 g_assert(hotplug_ctrl);
267 /* If device supports async unplug just request it to be done,
268 * otherwise just remove it synchronously */
269 hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
270 if (hdc->unplug_request) {
271 hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
273 hotplug_handler_unplug(hotplug_ctrl, dev, errp);
277 static int qdev_reset_one(DeviceState *dev, void *opaque)
284 static int qbus_reset_one(BusState *bus, void *opaque)
286 BusClass *bc = BUS_GET_CLASS(bus);
293 void qdev_reset_all(DeviceState *dev)
295 qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
298 void qbus_reset_all(BusState *bus)
300 qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
303 void qbus_reset_all_fn(void *opaque)
305 BusState *bus = opaque;
309 /* can be used as ->unplug() callback for the simple cases */
310 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
311 DeviceState *dev, Error **errp)
314 object_unparent(OBJECT(dev));
317 /* Like qdev_init(), but terminate program via error_report() instead of
318 returning an error value. This is okay during machine creation.
319 Don't use for hotplug, because there callers need to recover from
320 failure. Exception: if you know the device's init() callback can't
321 fail, then qdev_init_nofail() can't fail either, and is therefore
322 usable even then. But relying on the device implementation that
323 way is somewhat unclean, and best avoided. */
324 void qdev_init_nofail(DeviceState *dev)
326 const char *typename = object_get_typename(OBJECT(dev));
328 if (qdev_init(dev) < 0) {
329 error_report("Initialization of device %s failed", typename);
334 void qdev_machine_creation_done(void)
337 * ok, initial machine setup is done, starting from now we can
338 * only create hotpluggable devices
343 bool qdev_machine_modified(void)
345 return qdev_hot_added || qdev_hot_removed;
348 BusState *qdev_get_parent_bus(DeviceState *dev)
350 return dev->parent_bus;
353 static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev,
358 QLIST_FOREACH(ngl, &dev->gpios, node) {
359 /* NULL is a valid and matchable name, otherwise do a normal
362 if ((!ngl->name && !name) ||
363 (name && ngl->name && strcmp(name, ngl->name) == 0)) {
368 ngl = g_malloc0(sizeof(*ngl));
369 ngl->name = g_strdup(name);
370 QLIST_INSERT_HEAD(&dev->gpios, ngl, node);
374 void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
375 const char *name, int n)
378 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
379 char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-in");
381 assert(gpio_list->num_out == 0 || !name);
382 gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
385 for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) {
386 object_property_add_child(OBJECT(dev), propname,
387 OBJECT(gpio_list->in[i]), &error_abort);
391 gpio_list->num_in += n;
394 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
396 qdev_init_gpio_in_named(dev, handler, NULL, n);
399 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
400 const char *name, int n)
403 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
404 char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-out");
406 assert(gpio_list->num_in == 0 || !name);
407 assert(gpio_list->num_out == 0);
408 gpio_list->num_out = n;
409 gpio_list->out = pins;
411 for (i = 0; i < n; ++i) {
412 memset(&pins[i], 0, sizeof(*pins));
413 object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
415 object_property_allow_set_link,
416 OBJ_PROP_LINK_UNREF_ON_RELEASE,
422 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
424 qdev_init_gpio_out_named(dev, pins, NULL, n);
427 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n)
429 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
431 assert(n >= 0 && n < gpio_list->num_in);
432 return gpio_list->in[n];
435 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
437 return qdev_get_gpio_in_named(dev, NULL, n);
440 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
443 char *propname = g_strdup_printf("%s[%d]",
444 name ? name : "unnamed-gpio-out", n);
446 /* We need a name for object_property_set_link to work. If the
447 * object has a parent, object_property_add_child will come back
448 * with an error without doing anything. If it has none, it will
449 * never fail. So we can just call it with a NULL Error pointer.
451 object_property_add_child(qdev_get_machine(), "non-qdev-gpio[*]",
454 object_property_set_link(OBJECT(dev), OBJECT(pin), propname, &error_abort);
458 /* disconnect a GPIO ouput, returning the disconnected input (if any) */
460 static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
461 const char *name, int n)
463 char *propname = g_strdup_printf("%s[%d]",
464 name ? name : "unnamed-gpio-out", n);
466 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
469 object_property_set_link(OBJECT(dev), NULL, propname, NULL);
475 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
476 const char *name, int n)
478 qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
479 qdev_connect_gpio_out_named(dev, name, n, icpt);
483 void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
485 qdev_connect_gpio_out_named(dev, NULL, n, pin);
488 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
492 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
493 if (strcmp(name, bus->name) == 0) {
500 int qbus_walk_children(BusState *bus,
501 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
502 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
509 err = pre_busfn(bus, opaque);
515 QTAILQ_FOREACH(kid, &bus->children, sibling) {
516 err = qdev_walk_children(kid->child,
517 pre_devfn, pre_busfn,
518 post_devfn, post_busfn, opaque);
525 err = post_busfn(bus, opaque);
534 int qdev_walk_children(DeviceState *dev,
535 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
536 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
543 err = pre_devfn(dev, opaque);
549 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
550 err = qbus_walk_children(bus, pre_devfn, pre_busfn,
551 post_devfn, post_busfn, opaque);
558 err = post_devfn(dev, opaque);
567 DeviceState *qdev_find_recursive(BusState *bus, const char *id)
573 QTAILQ_FOREACH(kid, &bus->children, sibling) {
574 DeviceState *dev = kid->child;
576 if (dev->id && strcmp(dev->id, id) == 0) {
580 QLIST_FOREACH(child, &dev->child_bus, sibling) {
581 ret = qdev_find_recursive(child, id);
590 static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
592 const char *typename = object_get_typename(OBJECT(bus));
597 bus->parent = parent;
600 bus->name = g_strdup(name);
601 } else if (bus->parent && bus->parent->id) {
602 /* parent device has id -> use it plus parent-bus-id for bus name */
603 bus_id = bus->parent->num_child_bus;
605 len = strlen(bus->parent->id) + 16;
607 snprintf(buf, len, "%s.%d", bus->parent->id, bus_id);
610 /* no id -> use lowercase bus type plus global bus-id for bus name */
611 bc = BUS_GET_CLASS(bus);
612 bus_id = bc->automatic_ids++;
614 len = strlen(typename) + 16;
616 len = snprintf(buf, len, "%s.%d", typename, bus_id);
617 for (i = 0; i < len; i++) {
618 buf[i] = qemu_tolower(buf[i]);
624 QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
625 bus->parent->num_child_bus++;
626 object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
627 object_unref(OBJECT(bus));
628 } else if (bus != sysbus_get_default()) {
629 /* TODO: once all bus devices are qdevified,
630 only reset handler for main_system_bus should be registered here. */
631 qemu_register_reset(qbus_reset_all_fn, bus);
635 static void bus_unparent(Object *obj)
637 BusState *bus = BUS(obj);
640 while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
641 DeviceState *dev = kid->child;
642 object_unparent(OBJECT(dev));
645 QLIST_REMOVE(bus, sibling);
646 bus->parent->num_child_bus--;
649 assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
650 qemu_unregister_reset(qbus_reset_all_fn, bus);
654 static bool bus_get_realized(Object *obj, Error **errp)
656 BusState *bus = BUS(obj);
658 return bus->realized;
661 static void bus_set_realized(Object *obj, bool value, Error **errp)
663 BusState *bus = BUS(obj);
664 BusClass *bc = BUS_GET_CLASS(bus);
666 Error *local_err = NULL;
668 if (value && !bus->realized) {
670 bc->realize(bus, &local_err);
673 /* TODO: recursive realization */
674 } else if (!value && bus->realized) {
675 QTAILQ_FOREACH(kid, &bus->children, sibling) {
676 DeviceState *dev = kid->child;
677 object_property_set_bool(OBJECT(dev), false, "realized",
679 if (local_err != NULL) {
683 if (bc->unrealize && local_err == NULL) {
684 bc->unrealize(bus, &local_err);
688 if (local_err != NULL) {
689 error_propagate(errp, local_err);
693 bus->realized = value;
696 void qbus_create_inplace(void *bus, size_t size, const char *typename,
697 DeviceState *parent, const char *name)
699 object_initialize(bus, size, typename);
700 qbus_realize(bus, parent, name);
703 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
707 bus = BUS(object_new(typename));
708 qbus_realize(bus, parent, name);
713 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
715 BusClass *bc = BUS_GET_CLASS(bus);
717 if (bc->get_fw_dev_path) {
718 return bc->get_fw_dev_path(dev);
724 static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
726 Object *obj = OBJECT(dev);
729 while (!d && obj->parent) {
731 d = fw_path_provider_try_get_dev_path(obj, bus, dev);
736 static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
740 if (dev && dev->parent_bus) {
742 l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
743 d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev);
745 d = bus_get_fw_dev_path(dev->parent_bus, dev);
748 l += snprintf(p + l, size - l, "%s", d);
754 l += snprintf(p + l , size - l, "/");
759 char* qdev_get_fw_dev_path(DeviceState *dev)
764 l = qdev_get_fw_dev_path_helper(dev, path, 128);
768 return g_strdup(path);
771 char *qdev_get_dev_path(DeviceState *dev)
775 if (!dev || !dev->parent_bus) {
779 bc = BUS_GET_CLASS(dev->parent_bus);
780 if (bc->get_dev_path) {
781 return bc->get_dev_path(dev);
788 * Legacy property handling
791 static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
792 const char *name, Error **errp)
794 DeviceState *dev = DEVICE(obj);
795 Property *prop = opaque;
800 prop->info->print(dev, prop, buffer, sizeof(buffer));
801 visit_type_str(v, &ptr, name, errp);
805 * @qdev_add_legacy_property - adds a legacy property
807 * Do not use this is new code! Properties added through this interface will
808 * be given names and types in the "legacy" namespace.
810 * Legacy properties are string versions of other OOM properties. The format
811 * of the string depends on the property type.
813 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
818 /* Register pointer properties as legacy properties */
819 if (!prop->info->print && prop->info->get) {
823 name = g_strdup_printf("legacy-%s", prop->name);
824 object_property_add(OBJECT(dev), name, "str",
825 prop->info->print ? qdev_get_legacy_property : prop->info->get,
834 * @qdev_property_add_static - add a @Property to a device.
836 * Static properties access data in a struct. The actual type of the
837 * property and the field depends on the property type.
839 void qdev_property_add_static(DeviceState *dev, Property *prop,
842 Error *local_err = NULL;
843 Object *obj = OBJECT(dev);
846 * TODO qdev_prop_ptr does not have getters or setters. It must
847 * go now that it can be replaced with links. The test should be
848 * removed along with it: all static properties are read/write.
850 if (!prop->info->get && !prop->info->set) {
854 object_property_add(obj, prop->name, prop->info->name,
855 prop->info->get, prop->info->set,
860 error_propagate(errp, local_err);
864 object_property_set_description(obj, prop->name,
865 prop->info->description,
868 if (prop->qtype == QTYPE_NONE) {
872 if (prop->qtype == QTYPE_QBOOL) {
873 object_property_set_bool(obj, prop->defval, prop->name, &error_abort);
874 } else if (prop->info->enum_table) {
875 object_property_set_str(obj, prop->info->enum_table[prop->defval],
876 prop->name, &error_abort);
877 } else if (prop->qtype == QTYPE_QINT) {
878 object_property_set_int(obj, prop->defval, prop->name, &error_abort);
882 /* @qdev_alias_all_properties - Add alias properties to the source object for
883 * all qdev properties on the target DeviceState.
885 void qdev_alias_all_properties(DeviceState *target, Object *source)
890 class = object_get_class(OBJECT(target));
892 DeviceClass *dc = DEVICE_CLASS(class);
894 for (prop = dc->props; prop && prop->name; prop++) {
895 object_property_add_alias(source, prop->name,
896 OBJECT(target), prop->name,
899 class = object_class_get_parent(class);
900 } while (class != object_class_by_name(TYPE_DEVICE));
903 static bool device_get_realized(Object *obj, Error **errp)
905 DeviceState *dev = DEVICE(obj);
906 return dev->realized;
909 static void device_set_realized(Object *obj, bool value, Error **errp)
911 DeviceState *dev = DEVICE(obj);
912 DeviceClass *dc = DEVICE_GET_CLASS(dev);
913 HotplugHandler *hotplug_ctrl;
915 Error *local_err = NULL;
917 if (dev->hotplugged && !dc->hotpluggable) {
918 error_set(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
922 if (value && !dev->realized) {
924 static int unattached_count;
925 gchar *name = g_strdup_printf("device[%d]", unattached_count++);
927 object_property_add_child(container_get(qdev_get_machine(),
929 name, obj, &error_abort);
934 dc->realize(dev, &local_err);
937 if (local_err != NULL) {
941 hotplug_ctrl = qdev_get_hotplug_handler(dev);
943 hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
946 if (local_err != NULL) {
947 goto post_realize_fail;
950 if (qdev_get_vmsd(dev)) {
951 vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
952 dev->instance_id_alias,
953 dev->alias_required_for_version);
956 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
957 object_property_set_bool(OBJECT(bus), true, "realized",
959 if (local_err != NULL) {
960 goto child_realize_fail;
963 if (dev->hotplugged) {
966 dev->pending_deleted_event = false;
967 } else if (!value && dev->realized) {
968 Error **local_errp = NULL;
969 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
970 local_errp = local_err ? NULL : &local_err;
971 object_property_set_bool(OBJECT(bus), false, "realized",
974 if (qdev_get_vmsd(dev)) {
975 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
978 local_errp = local_err ? NULL : &local_err;
979 dc->unrealize(dev, local_errp);
981 dev->pending_deleted_event = true;
984 if (local_err != NULL) {
988 dev->realized = value;
992 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
993 object_property_set_bool(OBJECT(bus), false, "realized",
997 if (qdev_get_vmsd(dev)) {
998 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1002 if (dc->unrealize) {
1003 dc->unrealize(dev, NULL);
1007 error_propagate(errp, local_err);
1011 static bool device_get_hotpluggable(Object *obj, Error **errp)
1013 DeviceClass *dc = DEVICE_GET_CLASS(obj);
1014 DeviceState *dev = DEVICE(obj);
1016 return dc->hotpluggable && (dev->parent_bus == NULL ||
1017 qbus_is_hotpluggable(dev->parent_bus));
1020 static bool device_get_hotplugged(Object *obj, Error **err)
1022 DeviceState *dev = DEVICE(obj);
1024 return dev->hotplugged;
1027 static void device_set_hotplugged(Object *obj, bool value, Error **err)
1029 DeviceState *dev = DEVICE(obj);
1031 dev->hotplugged = value;
1034 static void device_initfn(Object *obj)
1036 DeviceState *dev = DEVICE(obj);
1041 dev->hotplugged = 1;
1042 qdev_hot_added = true;
1045 dev->instance_id_alias = -1;
1046 dev->realized = false;
1048 object_property_add_bool(obj, "realized",
1049 device_get_realized, device_set_realized, NULL);
1050 object_property_add_bool(obj, "hotpluggable",
1051 device_get_hotpluggable, NULL, NULL);
1052 object_property_add_bool(obj, "hotplugged",
1053 device_get_hotplugged, device_set_hotplugged,
1056 class = object_get_class(OBJECT(dev));
1058 for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
1059 qdev_property_add_legacy(dev, prop, &error_abort);
1060 qdev_property_add_static(dev, prop, &error_abort);
1062 class = object_class_get_parent(class);
1063 } while (class != object_class_by_name(TYPE_DEVICE));
1065 object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
1066 (Object **)&dev->parent_bus, NULL, 0,
1068 QLIST_INIT(&dev->gpios);
1071 static void device_post_init(Object *obj)
1074 qdev_prop_set_globals(DEVICE(obj), &err);
1076 qerror_report_err(err);
1082 /* Unlink device from bus and free the structure. */
1083 static void device_finalize(Object *obj)
1085 NamedGPIOList *ngl, *next;
1087 DeviceState *dev = DEVICE(obj);
1089 qemu_opts_del(dev->opts);
1092 QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
1093 QLIST_REMOVE(ngl, node);
1094 qemu_free_irqs(ngl->in, ngl->num_in);
1097 /* ngl->out irqs are owned by the other end and should not be freed
1103 static void device_class_base_init(ObjectClass *class, void *data)
1105 DeviceClass *klass = DEVICE_CLASS(class);
1107 /* We explicitly look up properties in the superclasses,
1108 * so do not propagate them to the subclasses.
1110 klass->props = NULL;
1113 static void device_unparent(Object *obj)
1115 DeviceState *dev = DEVICE(obj);
1118 if (dev->realized) {
1119 object_property_set_bool(obj, false, "realized", NULL);
1121 while (dev->num_child_bus) {
1122 bus = QLIST_FIRST(&dev->child_bus);
1123 object_unparent(OBJECT(bus));
1125 if (dev->parent_bus) {
1126 bus_remove_child(dev->parent_bus, dev);
1127 object_unref(OBJECT(dev->parent_bus));
1128 dev->parent_bus = NULL;
1131 /* Only send event if the device had been completely realized */
1132 if (dev->pending_deleted_event) {
1133 gchar *path = object_get_canonical_path(OBJECT(dev));
1135 qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort);
1140 static void device_class_init(ObjectClass *class, void *data)
1142 DeviceClass *dc = DEVICE_CLASS(class);
1144 class->unparent = device_unparent;
1145 dc->realize = device_realize;
1146 dc->unrealize = device_unrealize;
1148 /* by default all devices were considered as hotpluggable,
1149 * so with intent to check it in generic qdev_unplug() /
1150 * device_set_realized() functions make every device
1151 * hotpluggable. Devices that shouldn't be hotpluggable,
1152 * should override it in their class_init()
1154 dc->hotpluggable = true;
1157 void device_reset(DeviceState *dev)
1159 DeviceClass *klass = DEVICE_GET_CLASS(dev);
1166 Object *qdev_get_machine(void)
1171 dev = container_get(object_get_root(), "/machine");
1177 static const TypeInfo device_type_info = {
1178 .name = TYPE_DEVICE,
1179 .parent = TYPE_OBJECT,
1180 .instance_size = sizeof(DeviceState),
1181 .instance_init = device_initfn,
1182 .instance_post_init = device_post_init,
1183 .instance_finalize = device_finalize,
1184 .class_base_init = device_class_base_init,
1185 .class_init = device_class_init,
1187 .class_size = sizeof(DeviceClass),
1190 static void qbus_initfn(Object *obj)
1192 BusState *bus = BUS(obj);
1194 QTAILQ_INIT(&bus->children);
1195 object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
1196 TYPE_HOTPLUG_HANDLER,
1197 (Object **)&bus->hotplug_handler,
1198 object_property_allow_set_link,
1199 OBJ_PROP_LINK_UNREF_ON_RELEASE,
1201 object_property_add_bool(obj, "realized",
1202 bus_get_realized, bus_set_realized, NULL);
1205 static char *default_bus_get_fw_dev_path(DeviceState *dev)
1207 return g_strdup(object_get_typename(OBJECT(dev)));
1210 static void bus_class_init(ObjectClass *class, void *data)
1212 BusClass *bc = BUS_CLASS(class);
1214 class->unparent = bus_unparent;
1215 bc->get_fw_dev_path = default_bus_get_fw_dev_path;
1218 static void qbus_finalize(Object *obj)
1220 BusState *bus = BUS(obj);
1222 g_free((char *)bus->name);
1225 static const TypeInfo bus_info = {
1227 .parent = TYPE_OBJECT,
1228 .instance_size = sizeof(BusState),
1230 .class_size = sizeof(BusClass),
1231 .instance_init = qbus_initfn,
1232 .instance_finalize = qbus_finalize,
1233 .class_init = bus_class_init,
1236 static void qdev_register_types(void)
1238 type_register_static(&bus_info);
1239 type_register_static(&device_type_info);
1242 type_init(qdev_register_types)