| /* |
| * Dynamic device configuration and creation. |
| * |
| * Copyright (c) 2009 CodeSourcery |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* The theory here is that it should be possible to create a machine without |
| knowledge of specific devices. Historically board init routines have |
| passed a bunch of arguments to each device, requiring the board know |
| exactly which device it is dealing with. This file provides an abstract |
| API for device configuration and initialization. Devices will generally |
| inherit from a particular bus (e.g. PCI or I2C) rather than |
| this API directly. */ |
| |
| #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 "hw/hotplug.h" |
| #include "hw/boards.h" |
| #include "qapi-event.h" |
| |
| int qdev_hotplug = 0; |
| static bool qdev_hot_added = false; |
| static bool qdev_hot_removed = false; |
| |
| const VMStateDescription *qdev_get_vmsd(DeviceState *dev) |
| { |
| DeviceClass *dc = DEVICE_GET_CLASS(dev); |
| return dc->vmsd; |
| } |
| |
| const char *qdev_fw_name(DeviceState *dev) |
| { |
| DeviceClass *dc = DEVICE_GET_CLASS(dev); |
| |
| if (dc->fw_name) { |
| return dc->fw_name; |
| } |
| |
| 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; |
| |
| QTAILQ_FOREACH(kid, &bus->children, sibling) { |
| if (kid->child == child) { |
| char name[32]; |
| |
| snprintf(name, sizeof(name), "child[%d]", kid->index); |
| QTAILQ_REMOVE(&bus->children, kid, sibling); |
| |
| /* This gives back ownership of kid->child back to us. */ |
| object_property_del(OBJECT(bus), name, NULL); |
| object_unref(OBJECT(kid->child)); |
| g_free(kid); |
| return; |
| } |
| } |
| } |
| |
| static void bus_add_child(BusState *bus, DeviceState *child) |
| { |
| char name[32]; |
| BusChild *kid = g_malloc0(sizeof(*kid)); |
| |
| kid->index = bus->max_index++; |
| kid->child = child; |
| object_ref(OBJECT(kid->child)); |
| |
| QTAILQ_INSERT_HEAD(&bus->children, kid, sibling); |
| |
| /* This transfers ownership of kid->child to the property. */ |
| snprintf(name, sizeof(name), "child[%d]", kid->index); |
| object_property_add_link(OBJECT(bus), name, |
| object_get_typename(OBJECT(child)), |
| (Object **)&kid->child, |
| NULL, /* read-only property */ |
| 0, /* return ownership on prop deletion */ |
| NULL); |
| } |
| |
| void qdev_set_parent_bus(DeviceState *dev, BusState *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); |
| } |
| |
| /* Create a new device. This only initializes the device state structure |
| and allows properties to be set. qdev_init should be called to |
| initialize the actual device emulation. */ |
| DeviceState *qdev_create(BusState *bus, const char *name) |
| { |
| DeviceState *dev; |
| |
| dev = qdev_try_create(bus, name); |
| if (!dev) { |
| if (bus) { |
| error_report("Unknown device '%s' for bus '%s'", name, |
| object_get_typename(OBJECT(bus))); |
| } else { |
| error_report("Unknown device '%s' for default sysbus", name); |
| } |
| abort(); |
| } |
| |
| return dev; |
| } |
| |
| DeviceState *qdev_try_create(BusState *bus, const char *type) |
| { |
| DeviceState *dev; |
| |
| if (object_class_by_name(type) == NULL) { |
| return NULL; |
| } |
| dev = DEVICE(object_new(type)); |
| if (!dev) { |
| return NULL; |
| } |
| |
| if (!bus) { |
| bus = sysbus_get_default(); |
| } |
| |
| qdev_set_parent_bus(dev, bus); |
| object_unref(OBJECT(dev)); |
| return dev; |
| } |
| |
| /* Initialize a device. Device properties should be set before calling |
| this function. IRQs and MMIO regions should be connected/mapped after |
| calling this function. |
| On failure, destroy the device and return negative value. |
| Return 0 on success. */ |
| int qdev_init(DeviceState *dev) |
| { |
| Error *local_err = NULL; |
| |
| assert(!dev->realized); |
| |
| object_property_set_bool(OBJECT(dev), true, "realized", &local_err); |
| if (local_err != NULL) { |
| qerror_report_err(local_err); |
| error_free(local_err); |
| object_unparent(OBJECT(dev)); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static void device_realize(DeviceState *dev, Error **errp) |
| { |
| DeviceClass *dc = DEVICE_GET_CLASS(dev); |
| |
| if (dc->init) { |
| int rc = dc->init(dev); |
| if (rc < 0) { |
| error_setg(errp, "Device initialization failed."); |
| return; |
| } |
| } |
| } |
| |
| static void device_unrealize(DeviceState *dev, Error **errp) |
| { |
| DeviceClass *dc = DEVICE_GET_CLASS(dev); |
| |
| if (dc->exit) { |
| int rc = dc->exit(dev); |
| if (rc < 0) { |
| error_setg(errp, "Device exit failed."); |
| return; |
| } |
| } |
| } |
| |
| void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, |
| int required_for_version) |
| { |
| assert(!dev->realized); |
| dev->instance_id_alias = alias_id; |
| dev->alias_required_for_version = required_for_version; |
| } |
| |
| static HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev) |
| { |
| HotplugHandler *hotplug_ctrl = NULL; |
| |
| if (dev->parent_bus && dev->parent_bus->hotplug_handler) { |
| hotplug_ctrl = dev->parent_bus->hotplug_handler; |
| } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) { |
| MachineState *machine = MACHINE(qdev_get_machine()); |
| MachineClass *mc = MACHINE_GET_CLASS(machine); |
| |
| if (mc->get_hotplug_handler) { |
| hotplug_ctrl = mc->get_hotplug_handler(machine, dev); |
| } |
| } |
| 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_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name); |
| return; |
| } |
| |
| if (!dc->hotpluggable) { |
| error_set(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); |
| |
| return 0; |
| } |
| |
| static int qbus_reset_one(BusState *bus, void *opaque) |
| { |
| BusClass *bc = BUS_GET_CLASS(bus); |
| if (bc->reset) { |
| bc->reset(bus); |
| } |
| return 0; |
| } |
| |
| void qdev_reset_all(DeviceState *dev) |
| { |
| qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL); |
| } |
| |
| void qbus_reset_all(BusState *bus) |
| { |
| qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL); |
| } |
| |
| void qbus_reset_all_fn(void *opaque) |
| { |
| BusState *bus = opaque; |
| qbus_reset_all(bus); |
| } |
| |
| /* can be used as ->unplug() callback for the simple cases */ |
| void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev, |
| DeviceState *dev, Error **errp) |
| { |
| /* just zap it */ |
| object_unparent(OBJECT(dev)); |
| } |
| |
| /* Like qdev_init(), but terminate program via error_report() instead of |
| returning an error value. This is okay during machine creation. |
| Don't use for hotplug, because there callers need to recover from |
| failure. Exception: if you know the device's init() callback can't |
| fail, then qdev_init_nofail() can't fail either, and is therefore |
| usable even then. But relying on the device implementation that |
| way is somewhat unclean, and best avoided. */ |
| void qdev_init_nofail(DeviceState *dev) |
| { |
| const char *typename = object_get_typename(OBJECT(dev)); |
| |
| if (qdev_init(dev) < 0) { |
| error_report("Initialization of device %s failed", typename); |
| exit(1); |
| } |
| } |
| |
| void qdev_machine_creation_done(void) |
| { |
| /* |
| * ok, initial machine setup is done, starting from now we can |
| * only create hotpluggable devices |
| */ |
| qdev_hotplug = 1; |
| } |
| |
| bool qdev_machine_modified(void) |
| { |
| return qdev_hot_added || qdev_hot_removed; |
| } |
| |
| BusState *qdev_get_parent_bus(DeviceState *dev) |
| { |
| return dev->parent_bus; |
| } |
| |
| static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev, |
| const char *name) |
| { |
| NamedGPIOList *ngl; |
| |
| QLIST_FOREACH(ngl, &dev->gpios, node) { |
| /* NULL is a valid and matchable name, otherwise do a normal |
| * strcmp match. |
| */ |
| if ((!ngl->name && !name) || |
| (name && ngl->name && strcmp(name, ngl->name) == 0)) { |
| return ngl; |
| } |
| } |
| |
| ngl = g_malloc0(sizeof(*ngl)); |
| ngl->name = g_strdup(name); |
| QLIST_INSERT_HEAD(&dev->gpios, ngl, node); |
| return ngl; |
| } |
| |
| void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler, |
| const char *name, int n) |
| { |
| int i; |
| NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name); |
| char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-in"); |
| |
| assert(gpio_list->num_out == 0 || !name); |
| gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler, |
| dev, n); |
| |
| for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) { |
| object_property_add_child(OBJECT(dev), propname, |
| OBJECT(gpio_list->in[i]), &error_abort); |
| } |
| g_free(propname); |
| |
| gpio_list->num_in += n; |
| } |
| |
| void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n) |
| { |
| qdev_init_gpio_in_named(dev, handler, NULL, n); |
| } |
| |
| void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins, |
| const char *name, int n) |
| { |
| int i; |
| NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name); |
| char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-out"); |
| |
| assert(gpio_list->num_in == 0 || !name); |
| gpio_list->num_out += n; |
| |
| for (i = 0; i < n; ++i) { |
| memset(&pins[i], 0, sizeof(*pins)); |
| object_property_add_link(OBJECT(dev), propname, TYPE_IRQ, |
| (Object **)&pins[i], |
| object_property_allow_set_link, |
| OBJ_PROP_LINK_UNREF_ON_RELEASE, |
| &error_abort); |
| } |
| g_free(propname); |
| } |
| |
| void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n) |
| { |
| qdev_init_gpio_out_named(dev, pins, NULL, n); |
| } |
| |
| qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n) |
| { |
| NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name); |
| |
| assert(n >= 0 && n < gpio_list->num_in); |
| return gpio_list->in[n]; |
| } |
| |
| qemu_irq qdev_get_gpio_in(DeviceState *dev, int n) |
| { |
| return qdev_get_gpio_in_named(dev, NULL, n); |
| } |
| |
| void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n, |
| qemu_irq pin) |
| { |
| char *propname = g_strdup_printf("%s[%d]", |
| name ? name : "unnamed-gpio-out", n); |
| if (pin) { |
| /* We need a name for object_property_set_link to work. If the |
| * object has a parent, object_property_add_child will come back |
| * with an error without doing anything. If it has none, it will |
| * never fail. So we can just call it with a NULL Error pointer. |
| */ |
| object_property_add_child(qdev_get_machine(), "non-qdev-gpio[*]", |
| OBJECT(pin), NULL); |
| } |
| object_property_set_link(OBJECT(dev), OBJECT(pin), propname, &error_abort); |
| g_free(propname); |
| } |
| |
| qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n) |
| { |
| char *propname = g_strdup_printf("%s[%d]", |
| name ? name : "unnamed-gpio-out", n); |
| |
| qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname, |
| NULL); |
| |
| return ret; |
| } |
| |
| /* disconnect a GPIO ouput, returning the disconnected input (if any) */ |
| |
| static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev, |
| const char *name, int n) |
| { |
| char *propname = g_strdup_printf("%s[%d]", |
| name ? name : "unnamed-gpio-out", n); |
| |
| qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname, |
| NULL); |
| if (ret) { |
| object_property_set_link(OBJECT(dev), NULL, propname, NULL); |
| } |
| g_free(propname); |
| return ret; |
| } |
| |
| qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt, |
| const char *name, int n) |
| { |
| qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n); |
| qdev_connect_gpio_out_named(dev, name, n, icpt); |
| return disconnected; |
| } |
| |
| void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin) |
| { |
| qdev_connect_gpio_out_named(dev, NULL, n, pin); |
| } |
| |
| void qdev_pass_gpios(DeviceState *dev, DeviceState *container, |
| const char *name) |
| { |
| int i; |
| NamedGPIOList *ngl = qdev_get_named_gpio_list(dev, name); |
| |
| for (i = 0; i < ngl->num_in; i++) { |
| const char *nm = ngl->name ? ngl->name : "unnamed-gpio-in"; |
| char *propname = g_strdup_printf("%s[%d]", nm, i); |
| |
| object_property_add_alias(OBJECT(container), propname, |
| OBJECT(dev), propname, |
| &error_abort); |
| } |
| for (i = 0; i < ngl->num_out; i++) { |
| const char *nm = ngl->name ? ngl->name : "unnamed-gpio-out"; |
| char *propname = g_strdup_printf("%s[%d]", nm, i); |
| |
| object_property_add_alias(OBJECT(container), propname, |
| OBJECT(dev), propname, |
| &error_abort); |
| } |
| QLIST_REMOVE(ngl, node); |
| QLIST_INSERT_HEAD(&container->gpios, ngl, node); |
| } |
| |
| BusState *qdev_get_child_bus(DeviceState *dev, const char *name) |
| { |
| BusState *bus; |
| |
| QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
| if (strcmp(name, bus->name) == 0) { |
| return bus; |
| } |
| } |
| 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, |
| void *opaque) |
| { |
| BusState *bus; |
| int err; |
| |
| if (pre_devfn) { |
| err = pre_devfn(dev, opaque); |
| if (err) { |
| return err; |
| } |
| } |
| |
| QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
| err = qbus_walk_children(bus, pre_devfn, pre_busfn, |
| post_devfn, post_busfn, opaque); |
| if (err < 0) { |
| return err; |
| } |
| } |
| |
| if (post_devfn) { |
| err = post_devfn(dev, opaque); |
| if (err) { |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| DeviceState *qdev_find_recursive(BusState *bus, const char *id) |
| { |
| BusChild *kid; |
| DeviceState *ret; |
| BusState *child; |
| |
| QTAILQ_FOREACH(kid, &bus->children, sibling) { |
| DeviceState *dev = kid->child; |
| |
| if (dev->id && strcmp(dev->id, id) == 0) { |
| return dev; |
| } |
| |
| QLIST_FOREACH(child, &dev->child_bus, sibling) { |
| ret = qdev_find_recursive(child, id); |
| if (ret) { |
| return ret; |
| } |
| } |
| } |
| 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)); |
| if (!bus) { |
| hw_error("Can't create bus."); |
| } |
| qbus_realize(bus, parent, name); |
| |
| return bus; |
| } |
| |
| static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev) |
| { |
| BusClass *bc = BUS_GET_CLASS(bus); |
| |
| if (bc->get_fw_dev_path) { |
| return bc->get_fw_dev_path(dev); |
| } |
| |
| return NULL; |
| } |
| |
| static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev) |
| { |
| Object *obj = OBJECT(dev); |
| char *d = NULL; |
| |
| while (!d && obj->parent) { |
| obj = obj->parent; |
| d = fw_path_provider_try_get_dev_path(obj, bus, dev); |
| } |
| return d; |
| } |
| |
| static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size) |
| { |
| int l = 0; |
| |
| if (dev && dev->parent_bus) { |
| char *d; |
| l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size); |
| d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev); |
| if (!d) { |
| d = bus_get_fw_dev_path(dev->parent_bus, dev); |
| } |
| if (d) { |
| l += snprintf(p + l, size - l, "%s", d); |
| g_free(d); |
| } else { |
| return l; |
| } |
| } |
| l += snprintf(p + l , size - l, "/"); |
| |
| return l; |
| } |
| |
| char* qdev_get_fw_dev_path(DeviceState *dev) |
| { |
| char path[128]; |
| int l; |
| |
| l = qdev_get_fw_dev_path_helper(dev, path, 128); |
| |
| path[l-1] = '\0'; |
| |
| return g_strdup(path); |
| } |
| |
| char *qdev_get_dev_path(DeviceState *dev) |
| { |
| BusClass *bc; |
| |
| if (!dev || !dev->parent_bus) { |
| return NULL; |
| } |
| |
| bc = BUS_GET_CLASS(dev->parent_bus); |
| if (bc->get_dev_path) { |
| return bc->get_dev_path(dev); |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * Legacy property handling |
| */ |
| |
| static void qdev_get_legacy_property(Object *obj, Visitor *v, void *opaque, |
| const char *name, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| Property *prop = opaque; |
| |
| char buffer[1024]; |
| char *ptr = buffer; |
| |
| prop->info->print(dev, prop, buffer, sizeof(buffer)); |
| visit_type_str(v, &ptr, name, errp); |
| } |
| |
| /** |
| * @qdev_add_legacy_property - adds a legacy property |
| * |
| * 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 other OOM properties. The format |
| * of the string depends on the property type. |
| */ |
| static void qdev_property_add_legacy(DeviceState *dev, Property *prop, |
| Error **errp) |
| { |
| gchar *name; |
| |
| /* Register pointer properties as legacy properties */ |
| if (!prop->info->print && prop->info->get) { |
| return; |
| } |
| |
| name = g_strdup_printf("legacy-%s", prop->name); |
| object_property_add(OBJECT(dev), name, "str", |
| prop->info->print ? qdev_get_legacy_property : prop->info->get, |
| NULL, |
| NULL, |
| prop, errp); |
| |
| g_free(name); |
| } |
| |
| /** |
| * @qdev_property_add_static - add a @Property to a device. |
| * |
| * Static properties access data in a struct. The actual type of the |
| * property and the field depends on the property type. |
| */ |
| void qdev_property_add_static(DeviceState *dev, Property *prop, |
| Error **errp) |
| { |
| Error *local_err = NULL; |
| Object *obj = OBJECT(dev); |
| |
| /* |
| * TODO qdev_prop_ptr does not have getters or setters. It must |
| * go now that it can be replaced with links. The test should be |
| * removed along with it: all static properties are read/write. |
| */ |
| if (!prop->info->get && !prop->info->set) { |
| return; |
| } |
| |
| object_property_add(obj, prop->name, prop->info->name, |
| prop->info->get, prop->info->set, |
| prop->info->release, |
| prop, &local_err); |
| |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| |
| object_property_set_description(obj, prop->name, |
| prop->info->description, |
| &error_abort); |
| |
| if (prop->qtype == QTYPE_NONE) { |
| return; |
| } |
| |
| if (prop->qtype == QTYPE_QBOOL) { |
| object_property_set_bool(obj, prop->defval, prop->name, &error_abort); |
| } else if (prop->info->enum_table) { |
| object_property_set_str(obj, prop->info->enum_table[prop->defval], |
| prop->name, &error_abort); |
| } else if (prop->qtype == QTYPE_QINT) { |
| object_property_set_int(obj, prop->defval, prop->name, &error_abort); |
| } |
| } |
| |
| /* @qdev_alias_all_properties - Add alias properties to the source object for |
| * all qdev properties on the target DeviceState. |
| */ |
| void qdev_alias_all_properties(DeviceState *target, Object *source) |
| { |
| ObjectClass *class; |
| Property *prop; |
| |
| class = object_get_class(OBJECT(target)); |
| do { |
| DeviceClass *dc = DEVICE_CLASS(class); |
| |
| for (prop = dc->props; prop && prop->name; prop++) { |
| object_property_add_alias(source, prop->name, |
| OBJECT(target), prop->name, |
| &error_abort); |
| } |
| class = object_class_get_parent(class); |
| } while (class != object_class_by_name(TYPE_DEVICE)); |
| } |
| |
| static int qdev_add_hotpluggable_device(Object *obj, void *opaque) |
| { |
| GSList **list = opaque; |
| DeviceState *dev = DEVICE(obj); |
| |
| if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) { |
| *list = g_slist_append(*list, dev); |
| } |
| |
| return 0; |
| } |
| |
| GSList *qdev_build_hotpluggable_device_list(Object *peripheral) |
| { |
| GSList *list = NULL; |
| |
| object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list); |
| |
| return list; |
| } |
| |
| static bool device_get_realized(Object *obj, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| return dev->realized; |
| } |
| |
| static void device_set_realized(Object *obj, bool value, Error **errp) |
| { |
| DeviceState *dev = DEVICE(obj); |
| DeviceClass *dc = DEVICE_GET_CLASS(dev); |
| HotplugHandler *hotplug_ctrl; |
| BusState *bus; |
| Error *local_err = NULL; |
| |
| if (dev->hotplugged && !dc->hotpluggable) { |
| error_set(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj)); |
| return; |
| } |
| |
| if (value && !dev->realized) { |
| 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); |
| g_free(name); |
| } |
| |
| if (dc->realize) { |
| dc->realize(dev, &local_err); |
| } |
| |
| if (local_err != NULL) { |
| goto fail; |
| } |
| |
| hotplug_ctrl = qdev_get_hotplug_handler(dev); |
| if (hotplug_ctrl) { |
| hotplug_handler_plug(hotplug_ctrl, dev, &local_err); |
| } |
| |
| if (local_err != NULL) { |
| goto post_realize_fail; |
| } |
| |
| 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); |
| } |
| |
| QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
| object_property_set_bool(OBJECT(bus), true, "realized", |
| &local_err); |
| if (local_err != NULL) { |
| goto child_realize_fail; |
| } |
| } |
| if (dev->hotplugged) { |
| device_reset(dev); |
| } |
| dev->pending_deleted_event = false; |
| } else if (!value && dev->realized) { |
| Error **local_errp = NULL; |
| QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
| local_errp = local_err ? NULL : &local_err; |
| object_property_set_bool(OBJECT(bus), false, "realized", |
| local_errp); |
| } |
| if (qdev_get_vmsd(dev)) { |
| vmstate_unregister(dev, qdev_get_vmsd(dev), dev); |
| } |
| if (dc->unrealize) { |
| local_errp = local_err ? NULL : &local_err; |
| dc->unrealize(dev, local_errp); |
| } |
| dev->pending_deleted_event = true; |
| } |
| |
| if (local_err != NULL) { |
| goto fail; |
| } |
| |
| dev->realized = value; |
| return; |
| |
| child_realize_fail: |
| QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
| object_property_set_bool(OBJECT(bus), false, "realized", |
| NULL); |
| } |
| |
| if (qdev_get_vmsd(dev)) { |
| vmstate_unregister(dev, qdev_get_vmsd(dev), dev); |
| } |
| |
| post_realize_fail: |
| if (dc->unrealize) { |
| dc->unrealize(dev, NULL); |
| } |
| |
| fail: |
| error_propagate(errp, local_err); |
| return; |
| } |
| |
| static bool device_get_hotpluggable(Object *obj, Error **errp) |
| { |
| DeviceClass *dc = DEVICE_GET_CLASS(obj); |
| DeviceState *dev = DEVICE(obj); |
| |
| return dc->hotpluggable && (dev->parent_bus == NULL || |
| qbus_is_hotpluggable(dev->parent_bus)); |
| } |
| |
| static bool device_get_hotplugged(Object *obj, Error **err) |
| { |
| DeviceState *dev = DEVICE(obj); |
| |
| 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); |
| ObjectClass *class; |
| Property *prop; |
| |
| if (qdev_hotplug) { |
| dev->hotplugged = 1; |
| qdev_hot_added = true; |
| } |
| |
| dev->instance_id_alias = -1; |
| dev->realized = false; |
| |
| object_property_add_bool(obj, "realized", |
| device_get_realized, device_set_realized, NULL); |
| object_property_add_bool(obj, "hotpluggable", |
| device_get_hotpluggable, NULL, NULL); |
| object_property_add_bool(obj, "hotplugged", |
| device_get_hotplugged, device_set_hotplugged, |
| &error_abort); |
| |
| class = object_get_class(OBJECT(dev)); |
| do { |
| for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) { |
| qdev_property_add_legacy(dev, prop, &error_abort); |
| qdev_property_add_static(dev, prop, &error_abort); |
| } |
| class = object_class_get_parent(class); |
| } while (class != object_class_by_name(TYPE_DEVICE)); |
| |
| object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS, |
| (Object **)&dev->parent_bus, NULL, 0, |
| &error_abort); |
| QLIST_INIT(&dev->gpios); |
| } |
| |
| static void device_post_init(Object *obj) |
| { |
| Error *err = NULL; |
| qdev_prop_set_globals(DEVICE(obj), &err); |
| if (err) { |
| qerror_report_err(err); |
| error_free(err); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| /* Unlink device from bus and free the structure. */ |
| static void device_finalize(Object *obj) |
| { |
| NamedGPIOList *ngl, *next; |
| |
| DeviceState *dev = DEVICE(obj); |
| if (dev->opts) { |
| qemu_opts_del(dev->opts); |
| } |
| |
| QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) { |
| QLIST_REMOVE(ngl, node); |
| qemu_free_irqs(ngl->in, ngl->num_in); |
| g_free(ngl->name); |
| g_free(ngl); |
| /* ngl->out irqs are owned by the other end and should not be freed |
| * here |
| */ |
| } |
| } |
| |
| static void device_class_base_init(ObjectClass *class, void *data) |
| { |
| DeviceClass *klass = DEVICE_CLASS(class); |
| |
| /* We explicitly look up properties in the superclasses, |
| * so do not propagate them to the subclasses. |
| */ |
| klass->props = NULL; |
| } |
| |
| static void device_unparent(Object *obj) |
| { |
| DeviceState *dev = DEVICE(obj); |
| BusState *bus; |
| |
| if (dev->realized) { |
| object_property_set_bool(obj, false, "realized", NULL); |
| } |
| while (dev->num_child_bus) { |
| bus = QLIST_FIRST(&dev->child_bus); |
| object_unparent(OBJECT(bus)); |
| } |
| if (dev->parent_bus) { |
| bus_remove_child(dev->parent_bus, dev); |
| object_unref(OBJECT(dev->parent_bus)); |
| dev->parent_bus = NULL; |
| } |
| |
| /* Only send event if the device had been completely realized */ |
| if (dev->pending_deleted_event) { |
| gchar *path = object_get_canonical_path(OBJECT(dev)); |
| |
| qapi_event_send_device_deleted(!!dev->id, dev->id, path, &error_abort); |
| g_free(path); |
| } |
| } |
| |
| static void device_class_init(ObjectClass *class, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(class); |
| |
| class->unparent = device_unparent; |
| dc->realize = device_realize; |
| dc->unrealize = device_unrealize; |
| |
| /* by default all devices were considered as hotpluggable, |
| * so with intent to check it in generic qdev_unplug() / |
| * device_set_realized() functions make every device |
| * hotpluggable. Devices that shouldn't be hotpluggable, |
| * should override it in their class_init() |
| */ |
| dc->hotpluggable = true; |
| } |
| |
| void device_reset(DeviceState *dev) |
| { |
| DeviceClass *klass = DEVICE_GET_CLASS(dev); |
| |
| if (klass->reset) { |
| klass->reset(dev); |
| } |
| } |
| |
| Object *qdev_get_machine(void) |
| { |
| static Object *dev; |
| |
| if (dev == NULL) { |
| dev = container_get(object_get_root(), "/machine"); |
| } |
| |
| return dev; |
| } |
| |
| static const TypeInfo device_type_info = { |
| .name = TYPE_DEVICE, |
| .parent = TYPE_OBJECT, |
| .instance_size = sizeof(DeviceState), |
| .instance_init = device_initfn, |
| .instance_post_init = device_post_init, |
| .instance_finalize = device_finalize, |
| .class_base_init = device_class_base_init, |
| .class_init = device_class_init, |
| .abstract = true, |
| .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); |
| } |
| |
| type_init(qdev_register_types) |
