4 #include "qemu/queue.h"
5 #include "qemu/option.h"
6 #include "qemu/bitmap.h"
7 #include "qom/object.h"
9 #include "hw/hotplug.h"
12 DEV_NVECTORS_UNSPECIFIED = -1,
15 #define TYPE_DEVICE "device"
16 #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE)
17 #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE)
18 #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE)
20 typedef enum DeviceCategory {
21 DEVICE_CATEGORY_BRIDGE,
23 DEVICE_CATEGORY_STORAGE,
24 DEVICE_CATEGORY_NETWORK,
25 DEVICE_CATEGORY_INPUT,
26 DEVICE_CATEGORY_DISPLAY,
27 DEVICE_CATEGORY_SOUND,
33 typedef int (*qdev_initfn)(DeviceState *dev);
34 typedef int (*qdev_event)(DeviceState *dev);
35 typedef void (*qdev_resetfn)(DeviceState *dev);
36 typedef void (*DeviceRealize)(DeviceState *dev, Error **errp);
37 typedef void (*DeviceUnrealize)(DeviceState *dev, Error **errp);
38 typedef void (*BusRealize)(BusState *bus, Error **errp);
39 typedef void (*BusUnrealize)(BusState *bus, Error **errp);
41 struct VMStateDescription;
45 * @props: Properties accessing state fields.
46 * @realize: Callback function invoked when the #DeviceState:realized
47 * property is changed to %true. The default invokes @init if not %NULL.
48 * @unrealize: Callback function invoked when the #DeviceState:realized
49 * property is changed to %false.
50 * @init: Callback function invoked when the #DeviceState::realized property
51 * is changed to %true. Deprecated, new types inheriting directly from
52 * TYPE_DEVICE should use @realize instead, new leaf types should consult
53 * their respective parent type.
54 * @hotpluggable: indicates if #DeviceClass is hotpluggable, available
55 * as readonly "hotpluggable" property of #DeviceState instance
58 * Devices are constructed in two stages,
59 * 1) object instantiation via object_initialize() and
60 * 2) device realization via #DeviceState:realized property.
61 * The former may not fail (it might assert or exit), the latter may return
62 * error information to the caller and must be re-entrant.
63 * Trivial field initializations should go into #TypeInfo.instance_init.
64 * Operations depending on @props static properties should go into @realize.
65 * After successful realization, setting static properties will fail.
67 * As an interim step, the #DeviceState:realized property can also be
68 * set with qdev_init_nofail().
69 * In the future, devices will propagate this state change to their children
70 * and along busses they expose.
71 * The point in time will be deferred to machine creation, so that values
72 * set in @realize will not be introspectable beforehand. Therefore devices
73 * must not create children during @realize; they should initialize them via
74 * object_initialize() in their own #TypeInfo.instance_init and forward the
75 * realization events appropriately.
77 * The @init callback is considered private to a particular bus implementation
78 * (immediate abstract child types of TYPE_DEVICE). Derived leaf types set an
79 * "init" callback on their parent class instead.
81 * Any type may override the @realize and/or @unrealize callbacks but needs
82 * to call the parent type's implementation if keeping their functionality
83 * is desired. Refer to QOM documentation for further discussion and examples.
87 * If a type derived directly from TYPE_DEVICE implements @realize, it does
88 * not need to implement @init and therefore does not need to store and call
89 * #DeviceClass' default @realize callback.
90 * For other types consult the documentation and implementation of the
91 * respective parent types.
95 typedef struct DeviceClass {
97 ObjectClass parent_class;
100 DECLARE_BITMAP(categories, DEVICE_CATEGORY_MAX);
106 * Can this device be instantiated with -device / device_add?
107 * All devices should support instantiation with device_add, and
108 * this flag should not exist. But we're not there, yet. Some
109 * devices fail to instantiate with cryptic error messages.
110 * Others instantiate, but don't work. Exposing users to such
111 * behavior would be cruel; clearing this flag will protect them.
112 * It should never be cleared without a comment explaining why it
114 * TODO remove once we're there
120 void (*reset)(DeviceState *dev);
121 DeviceRealize realize;
122 DeviceUnrealize unrealize;
125 const struct VMStateDescription *vmsd;
127 /* Private to qdev / bus. */
128 qdev_initfn init; /* TODO remove, once users are converted to realize */
129 qdev_event exit; /* TODO remove, once users are converted to unrealize */
130 const char *bus_type;
133 typedef struct NamedGPIOList NamedGPIOList;
135 struct NamedGPIOList {
140 QLIST_ENTRY(NamedGPIOList) node;
145 * @realized: Indicates whether the device has been fully constructed.
147 * This structure should not be accessed directly. We declare it here
148 * so that it can be embedded in individual device state structures.
157 bool pending_deleted_event;
160 BusState *parent_bus;
161 QLIST_HEAD(, NamedGPIOList) gpios;
162 QLIST_HEAD(, BusState) child_bus;
164 int instance_id_alias;
165 int alias_required_for_version;
168 struct DeviceListener {
169 void (*realize)(DeviceListener *listener, DeviceState *dev);
170 void (*unrealize)(DeviceListener *listener, DeviceState *dev);
171 QTAILQ_ENTRY(DeviceListener) link;
174 #define TYPE_BUS "bus"
175 #define BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_BUS)
176 #define BUS_CLASS(klass) OBJECT_CLASS_CHECK(BusClass, (klass), TYPE_BUS)
177 #define BUS_GET_CLASS(obj) OBJECT_GET_CLASS(BusClass, (obj), TYPE_BUS)
180 ObjectClass parent_class;
182 /* FIXME first arg should be BusState */
183 void (*print_dev)(Monitor *mon, DeviceState *dev, int indent);
184 char *(*get_dev_path)(DeviceState *dev);
186 * This callback is used to create Open Firmware device path in accordance
187 * with OF spec http://forthworks.com/standards/of1275.pdf. Individual bus
188 * bindings can be found at http://playground.sun.com/1275/bindings/.
190 char *(*get_fw_dev_path)(DeviceState *dev);
191 void (*reset)(BusState *bus);
193 BusUnrealize unrealize;
195 /* maximum devices allowed on the bus, 0: no limit. */
197 /* number of automatically allocated bus ids (e.g. ide.0) */
201 typedef struct BusChild {
204 QTAILQ_ENTRY(BusChild) sibling;
207 #define QDEV_HOTPLUG_HANDLER_PROPERTY "hotplug-handler"
211 * @hotplug_device: link to a hotplug device associated with bus.
217 HotplugHandler *hotplug_handler;
220 QTAILQ_HEAD(ChildrenHead, BusChild) children;
221 QLIST_ENTRY(BusState) sibling;
234 PropertyInfo *arrayinfo;
238 struct PropertyInfo {
240 const char *description;
241 const char * const *enum_table;
242 int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
243 void (*set_default_value)(Object *obj, const Property *prop);
244 void (*create)(Object *obj, Property *prop, Error **errp);
245 ObjectPropertyAccessor *get;
246 ObjectPropertyAccessor *set;
247 ObjectPropertyRelease *release;
252 * @user_provided: Set to true if property comes from user-provided config
253 * (command-line or config file).
254 * @used: Set to true if property was used when initializing a device.
255 * @errp: Error destination, used like first argument of error_setg()
256 * in case property setting fails later. If @errp is NULL, we
257 * print warnings instead of ignoring errors silently. For
258 * hotplugged devices, errp is always ignored and warnings are
261 typedef struct GlobalProperty {
263 const char *property;
270 /*** Board API. This should go away once we have a machine config file. ***/
272 DeviceState *qdev_create(BusState *bus, const char *name);
273 DeviceState *qdev_try_create(BusState *bus, const char *name);
274 void qdev_init_nofail(DeviceState *dev);
275 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
276 int required_for_version);
277 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev);
278 void qdev_unplug(DeviceState *dev, Error **errp);
279 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
280 DeviceState *dev, Error **errp);
281 void qdev_machine_creation_done(void);
282 bool qdev_machine_modified(void);
284 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
285 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
287 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
288 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
290 qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n);
291 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
292 const char *name, int n);
294 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
296 /*** Device API. ***/
298 /* Register device properties. */
299 /* GPIO inputs also double as IRQ sinks. */
300 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
301 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
302 void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
303 const char *name, int n);
304 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
305 const char *name, int n);
307 void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
310 BusState *qdev_get_parent_bus(DeviceState *dev);
314 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
316 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
317 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
318 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
320 void qbus_create_inplace(void *bus, size_t size, const char *typename,
321 DeviceState *parent, const char *name);
322 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name);
323 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
324 * < 0 if either devfn or busfn terminate walk somewhere in cursion,
326 int qbus_walk_children(BusState *bus,
327 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
328 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
330 int qdev_walk_children(DeviceState *dev,
331 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
332 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
335 void qdev_reset_all(DeviceState *dev);
336 void qdev_reset_all_fn(void *opaque);
340 * @bus: Bus to be reset.
342 * Reset @bus and perform a bus-level ("hard") reset of all devices connected
343 * to it, including recursive processing of all buses below @bus itself. A
344 * hard reset means that qbus_reset_all will reset all state of the device.
345 * For PCI devices, for example, this will include the base address registers
346 * or configuration space.
348 void qbus_reset_all(BusState *bus);
349 void qbus_reset_all_fn(void *opaque);
351 /* This should go away once we get rid of the NULL bus hack */
352 BusState *sysbus_get_default(void);
354 char *qdev_get_fw_dev_path(DeviceState *dev);
355 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev);
360 * Initialize platform devices before machine init. This is a hack until full
361 * support for composition is added.
363 void qdev_machine_init(void);
368 * Reset a single device (by calling the reset method).
370 void device_reset(DeviceState *dev);
372 const struct VMStateDescription *qdev_get_vmsd(DeviceState *dev);
374 const char *qdev_fw_name(DeviceState *dev);
376 Object *qdev_get_machine(void);
378 /* FIXME: make this a link<> */
379 void qdev_set_parent_bus(DeviceState *dev, BusState *bus);
381 extern bool qdev_hotplug;
382 extern bool qdev_hot_removed;
384 char *qdev_get_dev_path(DeviceState *dev);
386 GSList *qdev_build_hotpluggable_device_list(Object *peripheral);
388 void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler,
391 void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp);
393 static inline bool qbus_is_hotpluggable(BusState *bus)
395 return bus->hotplug_handler;
398 void device_listener_register(DeviceListener *listener);
399 void device_listener_unregister(DeviceListener *listener);