4 #include "qemu/queue.h"
5 #include "qemu/bitmap.h"
6 #include "qom/object.h"
8 #include "hw/hotplug.h"
11 DEV_NVECTORS_UNSPECIFIED = -1,
14 #define TYPE_DEVICE "device"
15 #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE)
16 #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE)
17 #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE)
19 typedef enum DeviceCategory {
20 DEVICE_CATEGORY_BRIDGE,
22 DEVICE_CATEGORY_STORAGE,
23 DEVICE_CATEGORY_NETWORK,
24 DEVICE_CATEGORY_INPUT,
25 DEVICE_CATEGORY_DISPLAY,
26 DEVICE_CATEGORY_SOUND,
32 typedef void (*DeviceRealize)(DeviceState *dev, Error **errp);
33 typedef void (*DeviceUnrealize)(DeviceState *dev, Error **errp);
34 typedef void (*DeviceReset)(DeviceState *dev);
35 typedef void (*BusRealize)(BusState *bus, Error **errp);
36 typedef void (*BusUnrealize)(BusState *bus, Error **errp);
38 struct VMStateDescription;
42 * @props: Properties accessing state fields.
43 * @realize: Callback function invoked when the #DeviceState:realized
44 * property is changed to %true.
45 * @unrealize: Callback function invoked when the #DeviceState:realized
46 * property is changed to %false.
47 * @hotpluggable: indicates if #DeviceClass is hotpluggable, available
48 * as readonly "hotpluggable" property of #DeviceState instance
51 * Devices are constructed in two stages,
52 * 1) object instantiation via object_initialize() and
53 * 2) device realization via #DeviceState:realized property.
54 * The former may not fail (and must not abort or exit, since it is called
55 * during device introspection already), and the latter may return error
56 * information to the caller and must be re-entrant.
57 * Trivial field initializations should go into #TypeInfo.instance_init.
58 * Operations depending on @props static properties should go into @realize.
59 * After successful realization, setting static properties will fail.
61 * As an interim step, the #DeviceState:realized property can also be
62 * set with qdev_init_nofail().
63 * In the future, devices will propagate this state change to their children
64 * and along busses they expose.
65 * The point in time will be deferred to machine creation, so that values
66 * set in @realize will not be introspectable beforehand. Therefore devices
67 * must not create children during @realize; they should initialize them via
68 * object_initialize() in their own #TypeInfo.instance_init and forward the
69 * realization events appropriately.
71 * Any type may override the @realize and/or @unrealize callbacks but needs
72 * to call the parent type's implementation if keeping their functionality
73 * is desired. Refer to QOM documentation for further discussion and examples.
77 * Since TYPE_DEVICE doesn't implement @realize and @unrealize, types
78 * derived directly from it need not call their parent's @realize and
80 * For other types consult the documentation and implementation of the
81 * respective parent types.
85 typedef struct DeviceClass {
87 ObjectClass parent_class;
90 DECLARE_BITMAP(categories, DEVICE_CATEGORY_MAX);
96 * Can this device be instantiated with -device / device_add?
97 * All devices should support instantiation with device_add, and
98 * this flag should not exist. But we're not there, yet. Some
99 * devices fail to instantiate with cryptic error messages.
100 * Others instantiate, but don't work. Exposing users to such
101 * behavior would be cruel; clearing this flag will protect them.
102 * It should never be cleared without a comment explaining why it
104 * TODO remove once we're there
111 DeviceRealize realize;
112 DeviceUnrealize unrealize;
115 const struct VMStateDescription *vmsd;
117 /* Private to qdev / bus. */
118 const char *bus_type;
121 typedef struct NamedGPIOList NamedGPIOList;
123 struct NamedGPIOList {
128 QLIST_ENTRY(NamedGPIOList) node;
133 * @realized: Indicates whether the device has been fully constructed.
135 * This structure should not be accessed directly. We declare it here
136 * so that it can be embedded in individual device state structures.
144 char *canonical_path;
146 bool pending_deleted_event;
149 BusState *parent_bus;
150 QLIST_HEAD(, NamedGPIOList) gpios;
151 QLIST_HEAD(, BusState) child_bus;
153 int instance_id_alias;
154 int alias_required_for_version;
157 struct DeviceListener {
158 void (*realize)(DeviceListener *listener, DeviceState *dev);
159 void (*unrealize)(DeviceListener *listener, DeviceState *dev);
160 QTAILQ_ENTRY(DeviceListener) link;
163 #define TYPE_BUS "bus"
164 #define BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_BUS)
165 #define BUS_CLASS(klass) OBJECT_CLASS_CHECK(BusClass, (klass), TYPE_BUS)
166 #define BUS_GET_CLASS(obj) OBJECT_GET_CLASS(BusClass, (obj), TYPE_BUS)
169 ObjectClass parent_class;
171 /* FIXME first arg should be BusState */
172 void (*print_dev)(Monitor *mon, DeviceState *dev, int indent);
173 char *(*get_dev_path)(DeviceState *dev);
175 * This callback is used to create Open Firmware device path in accordance
176 * with OF spec http://forthworks.com/standards/of1275.pdf. Individual bus
177 * bindings can be found at http://playground.sun.com/1275/bindings/.
179 char *(*get_fw_dev_path)(DeviceState *dev);
180 void (*reset)(BusState *bus);
182 BusUnrealize unrealize;
184 /* maximum devices allowed on the bus, 0: no limit. */
186 /* number of automatically allocated bus ids (e.g. ide.0) */
190 typedef struct BusChild {
193 QTAILQ_ENTRY(BusChild) sibling;
196 #define QDEV_HOTPLUG_HANDLER_PROPERTY "hotplug-handler"
200 * @hotplug_handler: link to a hotplug handler associated with bus.
206 HotplugHandler *hotplug_handler;
209 QTAILQ_HEAD(ChildrenHead, BusChild) children;
210 QLIST_ENTRY(BusState) sibling;
215 * @set_default: true if the default value should be set from @defval,
216 * in which case @info->set_default_value must not be NULL
217 * (if false then no default value is set by the property system
218 * and the field retains whatever value it was given by instance_init).
219 * @defval: default value for the property. This is used only if @set_default
224 const PropertyInfo *info;
233 const PropertyInfo *arrayinfo;
235 const char *link_type;
238 struct PropertyInfo {
240 const char *description;
241 const QEnumLookup *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 * @used: Set to true if property was used when initializing a device.
254 * An error is fatal for non-hotplugged devices, when the global is applied.
256 typedef struct GlobalProperty {
258 const char *property;
264 compat_props_add(GPtrArray *arr,
265 GlobalProperty props[], size_t nelem)
268 for (i = 0; i < nelem; i++) {
269 g_ptr_array_add(arr, (void *)&props[i]);
273 /*** Board API. This should go away once we have a machine config file. ***/
275 DeviceState *qdev_create(BusState *bus, const char *name);
276 DeviceState *qdev_try_create(BusState *bus, const char *name);
277 void qdev_init_nofail(DeviceState *dev);
278 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
279 int required_for_version);
280 HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev);
281 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev);
282 void qdev_unplug(DeviceState *dev, Error **errp);
283 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
284 DeviceState *dev, Error **errp);
285 void qdev_machine_creation_done(void);
286 bool qdev_machine_modified(void);
288 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
289 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
291 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
292 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
294 qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n);
295 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
296 const char *name, int n);
298 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
300 /*** Device API. ***/
302 /* Register device properties. */
303 /* GPIO inputs also double as IRQ sinks. */
304 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
305 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
306 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
307 const char *name, int n);
309 * qdev_init_gpio_in_named_with_opaque: create an array of input GPIO lines
310 * for the specified device
312 * @dev: Device to create input GPIOs for
313 * @handler: Function to call when GPIO line value is set
314 * @opaque: Opaque data pointer to pass to @handler
315 * @name: Name of the GPIO input (must be unique for this device)
316 * @n: Number of GPIO lines in this input set
318 void qdev_init_gpio_in_named_with_opaque(DeviceState *dev,
319 qemu_irq_handler handler,
321 const char *name, int n);
324 * qdev_init_gpio_in_named: create an array of input GPIO lines
325 * for the specified device
327 * Like qdev_init_gpio_in_named_with_opaque(), but the opaque pointer
328 * passed to the handler is @dev (which is the most commonly desired behaviour).
330 static inline void qdev_init_gpio_in_named(DeviceState *dev,
331 qemu_irq_handler handler,
332 const char *name, int n)
334 qdev_init_gpio_in_named_with_opaque(dev, handler, dev, name, n);
337 void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
340 BusState *qdev_get_parent_bus(DeviceState *dev);
344 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
346 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
347 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
348 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
350 void qbus_create_inplace(void *bus, size_t size, const char *typename,
351 DeviceState *parent, const char *name);
352 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name);
353 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
354 * < 0 if either devfn or busfn terminate walk somewhere in cursion,
356 int qbus_walk_children(BusState *bus,
357 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
358 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
360 int qdev_walk_children(DeviceState *dev,
361 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
362 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
365 void qdev_reset_all(DeviceState *dev);
366 void qdev_reset_all_fn(void *opaque);
370 * @bus: Bus to be reset.
372 * Reset @bus and perform a bus-level ("hard") reset of all devices connected
373 * to it, including recursive processing of all buses below @bus itself. A
374 * hard reset means that qbus_reset_all will reset all state of the device.
375 * For PCI devices, for example, this will include the base address registers
376 * or configuration space.
378 void qbus_reset_all(BusState *bus);
379 void qbus_reset_all_fn(void *opaque);
381 /* This should go away once we get rid of the NULL bus hack */
382 BusState *sysbus_get_default(void);
384 char *qdev_get_fw_dev_path(DeviceState *dev);
385 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev);
390 * Initialize platform devices before machine init. This is a hack until full
391 * support for composition is added.
393 void qdev_machine_init(void);
398 * Reset a single device (by calling the reset method).
400 void device_reset(DeviceState *dev);
402 void device_class_set_parent_reset(DeviceClass *dc,
403 DeviceReset dev_reset,
404 DeviceReset *parent_reset);
405 void device_class_set_parent_realize(DeviceClass *dc,
406 DeviceRealize dev_realize,
407 DeviceRealize *parent_realize);
408 void device_class_set_parent_unrealize(DeviceClass *dc,
409 DeviceUnrealize dev_unrealize,
410 DeviceUnrealize *parent_unrealize);
412 const struct VMStateDescription *qdev_get_vmsd(DeviceState *dev);
414 const char *qdev_fw_name(DeviceState *dev);
416 Object *qdev_get_machine(void);
418 void object_apply_compat_props(Object *obj);
420 /* FIXME: make this a link<> */
421 void qdev_set_parent_bus(DeviceState *dev, BusState *bus);
423 extern bool qdev_hotplug;
424 extern bool qdev_hot_removed;
426 char *qdev_get_dev_path(DeviceState *dev);
428 GSList *qdev_build_hotpluggable_device_list(Object *peripheral);
430 void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler,
433 void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp);
435 static inline bool qbus_is_hotpluggable(BusState *bus)
437 return bus->hotplug_handler;
440 void device_listener_register(DeviceListener *listener);
441 void device_listener_unregister(DeviceListener *listener);