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(qdev_get_machine(), "non-qdev-gpio[*]",
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 ouput, 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,
566 for (i = 0; i < ngl->num_out; i++) {
567 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-out";
568 char *propname = g_strdup_printf("%s[%d]", nm, i);
570 object_property_add_alias(OBJECT(container), propname,
571 OBJECT(dev), propname,
574 QLIST_REMOVE(ngl, node);
575 QLIST_INSERT_HEAD(&container->gpios, ngl, node);
578 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
582 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
583 if (strcmp(name, bus->name) == 0) {
590 int qbus_walk_children(BusState *bus,
591 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
592 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
599 err = pre_busfn(bus, opaque);
605 QTAILQ_FOREACH(kid, &bus->children, sibling) {
606 err = qdev_walk_children(kid->child,
607 pre_devfn, pre_busfn,
608 post_devfn, post_busfn, opaque);
615 err = post_busfn(bus, opaque);
624 int qdev_walk_children(DeviceState *dev,
625 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
626 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
633 err = pre_devfn(dev, opaque);
639 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
640 err = qbus_walk_children(bus, pre_devfn, pre_busfn,
641 post_devfn, post_busfn, opaque);
648 err = post_devfn(dev, opaque);
657 DeviceState *qdev_find_recursive(BusState *bus, const char *id)
663 QTAILQ_FOREACH(kid, &bus->children, sibling) {
664 DeviceState *dev = kid->child;
666 if (dev->id && strcmp(dev->id, id) == 0) {
670 QLIST_FOREACH(child, &dev->child_bus, sibling) {
671 ret = qdev_find_recursive(child, id);
680 static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
682 const char *typename = object_get_typename(OBJECT(bus));
687 bus->parent = parent;
690 bus->name = g_strdup(name);
691 } else if (bus->parent && bus->parent->id) {
692 /* parent device has id -> use it plus parent-bus-id for bus name */
693 bus_id = bus->parent->num_child_bus;
695 len = strlen(bus->parent->id) + 16;
697 snprintf(buf, len, "%s.%d", bus->parent->id, bus_id);
700 /* no id -> use lowercase bus type plus global bus-id for bus name */
701 bc = BUS_GET_CLASS(bus);
702 bus_id = bc->automatic_ids++;
704 len = strlen(typename) + 16;
706 len = snprintf(buf, len, "%s.%d", typename, bus_id);
707 for (i = 0; i < len; i++) {
708 buf[i] = qemu_tolower(buf[i]);
714 QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
715 bus->parent->num_child_bus++;
716 object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
717 object_unref(OBJECT(bus));
718 } else if (bus != sysbus_get_default()) {
719 /* TODO: once all bus devices are qdevified,
720 only reset handler for main_system_bus should be registered here. */
721 qemu_register_reset(qbus_reset_all_fn, bus);
725 static void bus_unparent(Object *obj)
727 BusState *bus = BUS(obj);
730 while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
731 DeviceState *dev = kid->child;
732 object_unparent(OBJECT(dev));
735 QLIST_REMOVE(bus, sibling);
736 bus->parent->num_child_bus--;
739 assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
740 qemu_unregister_reset(qbus_reset_all_fn, bus);
744 static bool bus_get_realized(Object *obj, Error **errp)
746 BusState *bus = BUS(obj);
748 return bus->realized;
751 static void bus_set_realized(Object *obj, bool value, Error **errp)
753 BusState *bus = BUS(obj);
754 BusClass *bc = BUS_GET_CLASS(bus);
756 Error *local_err = NULL;
758 if (value && !bus->realized) {
760 bc->realize(bus, &local_err);
763 /* TODO: recursive realization */
764 } else if (!value && bus->realized) {
765 QTAILQ_FOREACH(kid, &bus->children, sibling) {
766 DeviceState *dev = kid->child;
767 object_property_set_bool(OBJECT(dev), false, "realized",
769 if (local_err != NULL) {
773 if (bc->unrealize && local_err == NULL) {
774 bc->unrealize(bus, &local_err);
778 if (local_err != NULL) {
779 error_propagate(errp, local_err);
783 bus->realized = value;
786 void qbus_create_inplace(void *bus, size_t size, const char *typename,
787 DeviceState *parent, const char *name)
789 object_initialize(bus, size, typename);
790 qbus_realize(bus, parent, name);
793 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
797 bus = BUS(object_new(typename));
798 qbus_realize(bus, parent, name);
803 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
805 BusClass *bc = BUS_GET_CLASS(bus);
807 if (bc->get_fw_dev_path) {
808 return bc->get_fw_dev_path(dev);
814 static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
816 Object *obj = OBJECT(dev);
819 while (!d && obj->parent) {
821 d = fw_path_provider_try_get_dev_path(obj, bus, dev);
826 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
828 Object *obj = OBJECT(dev);
830 return fw_path_provider_try_get_dev_path(obj, bus, dev);
833 static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
837 if (dev && dev->parent_bus) {
839 l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
840 d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev);
842 d = bus_get_fw_dev_path(dev->parent_bus, dev);
845 l += snprintf(p + l, size - l, "%s", d);
851 l += snprintf(p + l , size - l, "/");
856 char* qdev_get_fw_dev_path(DeviceState *dev)
861 l = qdev_get_fw_dev_path_helper(dev, path, 128);
865 return g_strdup(path);
868 char *qdev_get_dev_path(DeviceState *dev)
872 if (!dev || !dev->parent_bus) {
876 bc = BUS_GET_CLASS(dev->parent_bus);
877 if (bc->get_dev_path) {
878 return bc->get_dev_path(dev);
885 * Legacy property handling
888 static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
889 const char *name, Error **errp)
891 DeviceState *dev = DEVICE(obj);
892 Property *prop = opaque;
897 prop->info->print(dev, prop, buffer, sizeof(buffer));
898 visit_type_str(v, &ptr, name, errp);
902 * @qdev_add_legacy_property - adds a legacy property
904 * Do not use this is new code! Properties added through this interface will
905 * be given names and types in the "legacy" namespace.
907 * Legacy properties are string versions of other OOM properties. The format
908 * of the string depends on the property type.
910 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
915 /* Register pointer properties as legacy properties */
916 if (!prop->info->print && prop->info->get) {
920 name = g_strdup_printf("legacy-%s", prop->name);
921 object_property_add(OBJECT(dev), name, "str",
922 prop->info->print ? qdev_get_legacy_property : prop->info->get,
931 * @qdev_property_add_static - add a @Property to a device.
933 * Static properties access data in a struct. The actual type of the
934 * property and the field depends on the property type.
936 void qdev_property_add_static(DeviceState *dev, Property *prop,
939 Error *local_err = NULL;
940 Object *obj = OBJECT(dev);
943 * TODO qdev_prop_ptr does not have getters or setters. It must
944 * go now that it can be replaced with links. The test should be
945 * removed along with it: all static properties are read/write.
947 if (!prop->info->get && !prop->info->set) {
951 object_property_add(obj, prop->name, prop->info->name,
952 prop->info->get, prop->info->set,
957 error_propagate(errp, local_err);
961 object_property_set_description(obj, prop->name,
962 prop->info->description,
965 if (prop->qtype == QTYPE_NONE) {
969 if (prop->qtype == QTYPE_QBOOL) {
970 object_property_set_bool(obj, prop->defval, prop->name, &error_abort);
971 } else if (prop->info->enum_table) {
972 object_property_set_str(obj, prop->info->enum_table[prop->defval],
973 prop->name, &error_abort);
974 } else if (prop->qtype == QTYPE_QINT) {
975 object_property_set_int(obj, prop->defval, prop->name, &error_abort);
979 /* @qdev_alias_all_properties - Add alias properties to the source object for
980 * all qdev properties on the target DeviceState.
982 void qdev_alias_all_properties(DeviceState *target, Object *source)
987 class = object_get_class(OBJECT(target));
989 DeviceClass *dc = DEVICE_CLASS(class);
991 for (prop = dc->props; prop && prop->name; prop++) {
992 object_property_add_alias(source, prop->name,
993 OBJECT(target), prop->name,
996 class = object_class_get_parent(class);
997 } while (class != object_class_by_name(TYPE_DEVICE));
1000 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
1002 GSList **list = opaque;
1003 DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
1010 if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) {
1011 *list = g_slist_append(*list, dev);
1017 GSList *qdev_build_hotpluggable_device_list(Object *peripheral)
1019 GSList *list = NULL;
1021 object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list);
1026 static bool device_get_realized(Object *obj, Error **errp)
1028 DeviceState *dev = DEVICE(obj);
1029 return dev->realized;
1032 static void device_set_realized(Object *obj, bool value, Error **errp)
1034 DeviceState *dev = DEVICE(obj);
1035 DeviceClass *dc = DEVICE_GET_CLASS(dev);
1036 HotplugHandler *hotplug_ctrl;
1038 Error *local_err = NULL;
1040 if (dev->hotplugged && !dc->hotpluggable) {
1041 error_set(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
1045 if (value && !dev->realized) {
1047 static int unattached_count;
1048 gchar *name = g_strdup_printf("device[%d]", unattached_count++);
1050 object_property_add_child(container_get(qdev_get_machine(),
1052 name, obj, &error_abort);
1057 dc->realize(dev, &local_err);
1060 if (local_err != NULL) {
1064 DEVICE_LISTENER_CALL(realize, Forward, dev);
1066 hotplug_ctrl = qdev_get_hotplug_handler(dev);
1068 hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
1071 if (local_err != NULL) {
1072 goto post_realize_fail;
1075 if (qdev_get_vmsd(dev)) {
1076 vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
1077 dev->instance_id_alias,
1078 dev->alias_required_for_version);
1081 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1082 object_property_set_bool(OBJECT(bus), true, "realized",
1084 if (local_err != NULL) {
1085 goto child_realize_fail;
1088 if (dev->hotplugged) {
1091 dev->pending_deleted_event = false;
1092 } else if (!value && dev->realized) {
1093 Error **local_errp = NULL;
1094 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1095 local_errp = local_err ? NULL : &local_err;
1096 object_property_set_bool(OBJECT(bus), false, "realized",
1099 if (qdev_get_vmsd(dev)) {
1100 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1102 if (dc->unrealize) {
1103 local_errp = local_err ? NULL : &local_err;
1104 dc->unrealize(dev, local_errp);
1106 dev->pending_deleted_event = true;
1107 DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
1110 if (local_err != NULL) {
1114 dev->realized = value;
1118 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
1119 object_property_set_bool(OBJECT(bus), false, "realized",
1123 if (qdev_get_vmsd(dev)) {
1124 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
1128 if (dc->unrealize) {
1129 dc->unrealize(dev, NULL);
1133 error_propagate(errp, local_err);
1137 static bool device_get_hotpluggable(Object *obj, Error **errp)
1139 DeviceClass *dc = DEVICE_GET_CLASS(obj);
1140 DeviceState *dev = DEVICE(obj);
1142 return dc->hotpluggable && (dev->parent_bus == NULL ||
1143 qbus_is_hotpluggable(dev->parent_bus));
1146 static bool device_get_hotplugged(Object *obj, Error **err)
1148 DeviceState *dev = DEVICE(obj);
1150 return dev->hotplugged;
1153 static void device_set_hotplugged(Object *obj, bool value, Error **err)
1155 DeviceState *dev = DEVICE(obj);
1157 dev->hotplugged = value;
1160 static void device_initfn(Object *obj)
1162 DeviceState *dev = DEVICE(obj);
1167 dev->hotplugged = 1;
1168 qdev_hot_added = true;
1171 dev->instance_id_alias = -1;
1172 dev->realized = false;
1174 object_property_add_bool(obj, "realized",
1175 device_get_realized, device_set_realized, NULL);
1176 object_property_add_bool(obj, "hotpluggable",
1177 device_get_hotpluggable, NULL, NULL);
1178 object_property_add_bool(obj, "hotplugged",
1179 device_get_hotplugged, device_set_hotplugged,
1182 class = object_get_class(OBJECT(dev));
1184 for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
1185 qdev_property_add_legacy(dev, prop, &error_abort);
1186 qdev_property_add_static(dev, prop, &error_abort);
1188 class = object_class_get_parent(class);
1189 } while (class != object_class_by_name(TYPE_DEVICE));
1191 object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
1192 (Object **)&dev->parent_bus, NULL, 0,
1194 QLIST_INIT(&dev->gpios);
1197 static void device_post_init(Object *obj)
1199 qdev_prop_set_globals(DEVICE(obj));
1202 /* Unlink device from bus and free the structure. */
1203 static void device_finalize(Object *obj)
1205 NamedGPIOList *ngl, *next;
1207 DeviceState *dev = DEVICE(obj);
1208 qemu_opts_del(dev->opts);
1210 QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
1211 QLIST_REMOVE(ngl, node);
1212 qemu_free_irqs(ngl->in, ngl->num_in);
1215 /* ngl->out irqs are owned by the other end and should not be freed
1221 static void device_class_base_init(ObjectClass *class, void *data)
1223 DeviceClass *klass = DEVICE_CLASS(class);
1225 /* We explicitly look up properties in the superclasses,
1226 * so do not propagate them to the subclasses.
1228 klass->props = NULL;
1231 static void device_unparent(Object *obj)
1233 DeviceState *dev = DEVICE(obj);
1236 if (dev->realized) {
1237 object_property_set_bool(obj, false, "realized", NULL);
1239 while (dev->num_child_bus) {
1240 bus = QLIST_FIRST(&dev->child_bus);
1241 object_unparent(OBJECT(bus));
1243 if (dev->parent_bus) {
1244 bus_remove_child(dev->parent_bus, dev);
1245 object_unref(OBJECT(dev->parent_bus));
1246 dev->parent_bus = NULL;
1249 /* Only send event if the device had been completely realized */
1250 if (dev->pending_deleted_event) {
1251 gchar *path = object_get_canonical_path(OBJECT(dev));
1253 qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort);
1258 static void device_class_init(ObjectClass *class, void *data)
1260 DeviceClass *dc = DEVICE_CLASS(class);
1262 class->unparent = device_unparent;
1263 dc->realize = device_realize;
1264 dc->unrealize = device_unrealize;
1266 /* by default all devices were considered as hotpluggable,
1267 * so with intent to check it in generic qdev_unplug() /
1268 * device_set_realized() functions make every device
1269 * hotpluggable. Devices that shouldn't be hotpluggable,
1270 * should override it in their class_init()
1272 dc->hotpluggable = true;
1275 void device_reset(DeviceState *dev)
1277 DeviceClass *klass = DEVICE_GET_CLASS(dev);
1284 Object *qdev_get_machine(void)
1289 dev = container_get(object_get_root(), "/machine");
1295 static const TypeInfo device_type_info = {
1296 .name = TYPE_DEVICE,
1297 .parent = TYPE_OBJECT,
1298 .instance_size = sizeof(DeviceState),
1299 .instance_init = device_initfn,
1300 .instance_post_init = device_post_init,
1301 .instance_finalize = device_finalize,
1302 .class_base_init = device_class_base_init,
1303 .class_init = device_class_init,
1305 .class_size = sizeof(DeviceClass),
1308 static void qbus_initfn(Object *obj)
1310 BusState *bus = BUS(obj);
1312 QTAILQ_INIT(&bus->children);
1313 object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
1314 TYPE_HOTPLUG_HANDLER,
1315 (Object **)&bus->hotplug_handler,
1316 object_property_allow_set_link,
1317 OBJ_PROP_LINK_UNREF_ON_RELEASE,
1319 object_property_add_bool(obj, "realized",
1320 bus_get_realized, bus_set_realized, NULL);
1323 static char *default_bus_get_fw_dev_path(DeviceState *dev)
1325 return g_strdup(object_get_typename(OBJECT(dev)));
1328 static void bus_class_init(ObjectClass *class, void *data)
1330 BusClass *bc = BUS_CLASS(class);
1332 class->unparent = bus_unparent;
1333 bc->get_fw_dev_path = default_bus_get_fw_dev_path;
1336 static void qbus_finalize(Object *obj)
1338 BusState *bus = BUS(obj);
1340 g_free((char *)bus->name);
1343 static const TypeInfo bus_info = {
1345 .parent = TYPE_OBJECT,
1346 .instance_size = sizeof(BusState),
1348 .class_size = sizeof(BusClass),
1349 .instance_init = qbus_initfn,
1350 .instance_finalize = qbus_finalize,
1351 .class_init = bus_class_init,
1354 static void qdev_register_types(void)
1356 type_register_static(&bus_info);
1357 type_register_static(&device_type_info);
1360 type_init(qdev_register_types)