inherit from a particular bus (e.g. PCI or I2C) rather than
this API directly. */
+#include "qemu/osdep.h"
#include "hw/qdev.h"
#include "hw/fw-path-provider.h"
#include "sysemu/sysemu.h"
-#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qapi/visitor.h"
#include "qapi/qmp/qjson.h"
#include "qemu/error-report.h"
#include "hw/hotplug.h"
#include "hw/boards.h"
+#include "hw/sysbus.h"
#include "qapi-event.h"
+#include "migration/migration.h"
-int qdev_hotplug = 0;
+bool qdev_hotplug = false;
static bool qdev_hot_added = false;
-static bool qdev_hot_removed = false;
+bool qdev_hot_removed = false;
const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
{
return object_get_typename(OBJECT(dev));
}
-static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
- Error **errp);
-
static void bus_remove_child(BusState *bus, DeviceState *child)
{
BusChild *kid;
void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
{
+ bool replugging = dev->parent_bus != NULL;
+
+ if (replugging) {
+ /* Keep a reference to the device while it's not plugged into
+ * any bus, to avoid it potentially evaporating when it is
+ * dereffed in bus_remove_child().
+ */
+ object_ref(OBJECT(dev));
+ bus_remove_child(dev->parent_bus, dev);
+ object_unref(OBJECT(dev->parent_bus));
+ }
dev->parent_bus = bus;
object_ref(OBJECT(bus));
bus_add_child(bus, dev);
-}
-
-static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
- Error **errp)
-{
-
- object_property_set_link(OBJECT(bus), OBJECT(handler),
- QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
-}
-
-void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler, Error **errp)
-{
- qbus_set_hotplug_handler_internal(bus, OBJECT(handler), errp);
-}
-
-void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp)
-{
- qbus_set_hotplug_handler_internal(bus, OBJECT(bus), errp);
+ if (replugging) {
+ object_unref(OBJECT(dev));
+ }
}
/* Create a new device. This only initializes the device state
}
if (!bus) {
+ /* Assert that the device really is a SysBusDevice before
+ * we put it onto the sysbus. Non-sysbus devices which aren't
+ * being put onto a bus should be created with object_new(TYPE_FOO),
+ * not qdev_create(NULL, TYPE_FOO).
+ */
+ g_assert(object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE));
bus = sysbus_get_default();
}
return hotplug_ctrl;
}
-void qdev_unplug(DeviceState *dev, Error **errp)
-{
- DeviceClass *dc = DEVICE_GET_CLASS(dev);
- HotplugHandler *hotplug_ctrl;
- HotplugHandlerClass *hdc;
-
- if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
- error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
- return;
- }
-
- if (!dc->hotpluggable) {
- error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
- object_get_typename(OBJECT(dev)));
- return;
- }
-
- qdev_hot_removed = true;
-
- hotplug_ctrl = qdev_get_hotplug_handler(dev);
- /* hotpluggable device MUST have HotplugHandler, if it doesn't
- * then something is very wrong with it */
- g_assert(hotplug_ctrl);
-
- /* If device supports async unplug just request it to be done,
- * otherwise just remove it synchronously */
- hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
- if (hdc->unplug_request) {
- hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
- } else {
- hotplug_handler_unplug(hotplug_ctrl, dev, errp);
- }
-}
-
static int qdev_reset_one(DeviceState *dev, void *opaque)
{
device_reset(dev);
qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
}
+void qdev_reset_all_fn(void *opaque)
+{
+ qdev_reset_all(DEVICE(opaque));
+}
+
void qbus_reset_all(BusState *bus)
{
qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
assert(!dev->realized);
+ object_ref(OBJECT(dev));
object_property_set_bool(OBJECT(dev), true, "realized", &err);
if (err) {
- error_report("Initialization of device %s failed: %s",
- object_get_typename(OBJECT(dev)),
- error_get_pretty(err));
+ error_reportf_err(err, "Initialization of device %s failed: ",
+ object_get_typename(OBJECT(dev)));
exit(1);
}
+ object_unref(OBJECT(dev));
}
void qdev_machine_creation_done(void)
* ok, initial machine setup is done, starting from now we can
* only create hotpluggable devices
*/
- qdev_hotplug = 1;
+ qdev_hotplug = true;
}
bool qdev_machine_modified(void)
BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
{
BusState *bus;
+ Object *child = object_resolve_path_component(OBJECT(dev), name);
+
+ bus = (BusState *)object_dynamic_cast(child, TYPE_BUS);
+ if (bus) {
+ return bus;
+ }
QLIST_FOREACH(bus, &dev->child_bus, sibling) {
if (strcmp(name, bus->name) == 0) {
return NULL;
}
-int qbus_walk_children(BusState *bus,
- qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
- qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
- void *opaque)
-{
- BusChild *kid;
- int err;
-
- if (pre_busfn) {
- err = pre_busfn(bus, opaque);
- if (err) {
- return err;
- }
- }
-
- QTAILQ_FOREACH(kid, &bus->children, sibling) {
- err = qdev_walk_children(kid->child,
- pre_devfn, pre_busfn,
- post_devfn, post_busfn, opaque);
- if (err < 0) {
- return err;
- }
- }
-
- if (post_busfn) {
- err = post_busfn(bus, opaque);
- if (err) {
- return err;
- }
- }
-
- return 0;
-}
-
int qdev_walk_children(DeviceState *dev,
qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
return NULL;
}
-static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
-{
- const char *typename = object_get_typename(OBJECT(bus));
- BusClass *bc;
- char *buf;
- int i, len, bus_id;
-
- bus->parent = parent;
-
- if (name) {
- bus->name = g_strdup(name);
- } else if (bus->parent && bus->parent->id) {
- /* parent device has id -> use it plus parent-bus-id for bus name */
- bus_id = bus->parent->num_child_bus;
-
- len = strlen(bus->parent->id) + 16;
- buf = g_malloc(len);
- snprintf(buf, len, "%s.%d", bus->parent->id, bus_id);
- bus->name = buf;
- } else {
- /* no id -> use lowercase bus type plus global bus-id for bus name */
- bc = BUS_GET_CLASS(bus);
- bus_id = bc->automatic_ids++;
-
- len = strlen(typename) + 16;
- buf = g_malloc(len);
- len = snprintf(buf, len, "%s.%d", typename, bus_id);
- for (i = 0; i < len; i++) {
- buf[i] = qemu_tolower(buf[i]);
- }
- bus->name = buf;
- }
-
- if (bus->parent) {
- QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
- bus->parent->num_child_bus++;
- object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
- object_unref(OBJECT(bus));
- } else if (bus != sysbus_get_default()) {
- /* TODO: once all bus devices are qdevified,
- only reset handler for main_system_bus should be registered here. */
- qemu_register_reset(qbus_reset_all_fn, bus);
- }
-}
-
-static void bus_unparent(Object *obj)
-{
- BusState *bus = BUS(obj);
- BusChild *kid;
-
- while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
- DeviceState *dev = kid->child;
- object_unparent(OBJECT(dev));
- }
- if (bus->parent) {
- QLIST_REMOVE(bus, sibling);
- bus->parent->num_child_bus--;
- bus->parent = NULL;
- } else {
- assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
- qemu_unregister_reset(qbus_reset_all_fn, bus);
- }
-}
-
-static bool bus_get_realized(Object *obj, Error **errp)
-{
- BusState *bus = BUS(obj);
-
- return bus->realized;
-}
-
-static void bus_set_realized(Object *obj, bool value, Error **errp)
-{
- BusState *bus = BUS(obj);
- BusClass *bc = BUS_GET_CLASS(bus);
- BusChild *kid;
- Error *local_err = NULL;
-
- if (value && !bus->realized) {
- if (bc->realize) {
- bc->realize(bus, &local_err);
- }
-
- /* TODO: recursive realization */
- } else if (!value && bus->realized) {
- QTAILQ_FOREACH(kid, &bus->children, sibling) {
- DeviceState *dev = kid->child;
- object_property_set_bool(OBJECT(dev), false, "realized",
- &local_err);
- if (local_err != NULL) {
- break;
- }
- }
- if (bc->unrealize && local_err == NULL) {
- bc->unrealize(bus, &local_err);
- }
- }
-
- if (local_err != NULL) {
- error_propagate(errp, local_err);
- return;
- }
-
- bus->realized = value;
-}
-
-void qbus_create_inplace(void *bus, size_t size, const char *typename,
- DeviceState *parent, const char *name)
-{
- object_initialize(bus, size, typename);
- qbus_realize(bus, parent, name);
-}
-
-BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
-{
- BusState *bus;
-
- bus = BUS(object_new(typename));
- qbus_realize(bus, parent, name);
-
- return bus;
-}
-
static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
{
BusClass *bc = BUS_GET_CLASS(bus);
* Legacy property handling
*/
-static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque,
- const char *name, Error **errp)
+static void qdev_get_legacy_property(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
char *ptr = buffer;
prop->info->print(dev, prop, buffer, sizeof(buffer));
- visit_type_str(v, &ptr, name, errp);
+ visit_type_str(v, name, &ptr, errp);
}
/**
- * @qdev_add_legacy_property - adds a legacy property
+ * qdev_property_add_legacy:
+ * @dev: Device to add the property to.
+ * @prop: The qdev property definition.
+ * @errp: location to store error information.
+ *
+ * Add a legacy QOM property to @dev for qdev property @prop.
+ * On error, store error in @errp.
*
- * Do not use this is new code! Properties added through this interface will
- * be given names and types in the "legacy" namespace.
+ * Legacy properties are string versions of QOM properties. The format of
+ * the string depends on the property type. Legacy properties are only
+ * needed for "info qtree".
*
- * Legacy properties are string versions of other OOM properties. The format
- * of the string depends on the property type.
+ * Do not use this is new code! QOM Properties added through this interface
+ * will be given names in the "legacy" namespace.
*/
static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
Error **errp)
}
/**
- * @qdev_property_add_static - add a @Property to a device.
+ * qdev_property_add_static:
+ * @dev: Device to add the property to.
+ * @prop: The qdev property definition.
+ * @errp: location to store error information.
*
- * Static properties access data in a struct. The actual type of the
- * property and the field depends on the property type.
+ * Add a static QOM property to @dev for qdev property @prop.
+ * On error, store error in @errp. Static properties access data in a struct.
+ * The type of the QOM property is derived from prop->info.
*/
void qdev_property_add_static(DeviceState *dev, Property *prop,
Error **errp)
HotplugHandler *hotplug_ctrl;
BusState *bus;
Error *local_err = NULL;
+ bool unattached_parent = false;
+ static int unattached_count;
+ int ret;
if (dev->hotplugged && !dc->hotpluggable) {
error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
}
if (value && !dev->realized) {
+ ret = check_migratable(obj, &local_err);
+ if (ret < 0) {
+ goto fail;
+ }
+
if (!obj->parent) {
- static int unattached_count;
gchar *name = g_strdup_printf("device[%d]", unattached_count++);
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
name, obj, &error_abort);
+ unattached_parent = true;
g_free(name);
}
+ hotplug_ctrl = qdev_get_hotplug_handler(dev);
+ if (hotplug_ctrl) {
+ hotplug_handler_pre_plug(hotplug_ctrl, dev, &local_err);
+ if (local_err != NULL) {
+ goto fail;
+ }
+ }
+
if (dc->realize) {
dc->realize(dev, &local_err);
}
DEVICE_LISTENER_CALL(realize, Forward, dev);
- hotplug_ctrl = qdev_get_hotplug_handler(dev);
if (hotplug_ctrl) {
hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
}
}
if (qdev_get_vmsd(dev)) {
- vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
- dev->instance_id_alias,
- dev->alias_required_for_version);
+ if (vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
+ dev->instance_id_alias,
+ dev->alias_required_for_version,
+ &local_err) < 0) {
+ goto post_realize_fail;
+ }
}
QLIST_FOREACH(bus, &dev->child_bus, sibling) {
fail:
error_propagate(errp, local_err);
- return;
+ if (unattached_parent) {
+ object_unparent(OBJECT(dev));
+ unattached_count--;
+ }
}
static bool device_get_hotpluggable(Object *obj, Error **errp)
return dev->hotplugged;
}
-static void device_set_hotplugged(Object *obj, bool value, Error **err)
-{
- DeviceState *dev = DEVICE(obj);
-
- dev->hotplugged = value;
-}
-
static void device_initfn(Object *obj)
{
DeviceState *dev = DEVICE(obj);
object_property_add_bool(obj, "hotpluggable",
device_get_hotpluggable, NULL, NULL);
object_property_add_bool(obj, "hotplugged",
- device_get_hotplugged, device_set_hotplugged,
+ device_get_hotplugged, NULL,
&error_abort);
class = object_get_class(OBJECT(dev));
NamedGPIOList *ngl, *next;
DeviceState *dev = DEVICE(obj);
- qemu_opts_del(dev->opts);
QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
QLIST_REMOVE(ngl, node);
qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort);
g_free(path);
}
+
+ qemu_opts_del(dev->opts);
+ dev->opts = NULL;
}
static void device_class_init(ObjectClass *class, void *data)
.class_size = sizeof(DeviceClass),
};
-static void qbus_initfn(Object *obj)
-{
- BusState *bus = BUS(obj);
-
- QTAILQ_INIT(&bus->children);
- object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
- TYPE_HOTPLUG_HANDLER,
- (Object **)&bus->hotplug_handler,
- object_property_allow_set_link,
- OBJ_PROP_LINK_UNREF_ON_RELEASE,
- NULL);
- object_property_add_bool(obj, "realized",
- bus_get_realized, bus_set_realized, NULL);
-}
-
-static char *default_bus_get_fw_dev_path(DeviceState *dev)
-{
- return g_strdup(object_get_typename(OBJECT(dev)));
-}
-
-static void bus_class_init(ObjectClass *class, void *data)
-{
- BusClass *bc = BUS_CLASS(class);
-
- class->unparent = bus_unparent;
- bc->get_fw_dev_path = default_bus_get_fw_dev_path;
-}
-
-static void qbus_finalize(Object *obj)
-{
- BusState *bus = BUS(obj);
-
- g_free((char *)bus->name);
-}
-
-static const TypeInfo bus_info = {
- .name = TYPE_BUS,
- .parent = TYPE_OBJECT,
- .instance_size = sizeof(BusState),
- .abstract = true,
- .class_size = sizeof(BusClass),
- .instance_init = qbus_initfn,
- .instance_finalize = qbus_finalize,
- .class_init = bus_class_init,
-};
-
static void qdev_register_types(void)
{
- type_register_static(&bus_info);
type_register_static(&device_type_info);
}
projects / qemu.git / blobdiff