4 #include "qemu/queue.h"
5 #include "qemu/bitmap.h"
6 #include "qom/object.h"
7 #include "hw/hotplug.h"
8 #include "hw/resettable.h"
11 DEV_NVECTORS_UNSPECIFIED
= -1,
14 #define TYPE_DEVICE "device"
15 typedef struct DeviceClass DeviceClass
;
16 DECLARE_OBJ_CHECKERS(DeviceState
, DeviceClass
,
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
);
34 typedef void (*DeviceReset
)(DeviceState
*dev
);
35 typedef void (*BusRealize
)(BusState
*bus
, Error
**errp
);
36 typedef void (*BusUnrealize
)(BusState
*bus
);
40 * @props: Properties accessing state fields.
41 * @realize: Callback function invoked when the #DeviceState:realized
42 * property is changed to %true.
43 * @unrealize: Callback function invoked when the #DeviceState:realized
44 * property is changed to %false.
45 * @hotpluggable: indicates if #DeviceClass is hotpluggable, available
46 * as readonly "hotpluggable" property of #DeviceState instance
49 * Devices are constructed in two stages,
50 * 1) object instantiation via object_initialize() and
51 * 2) device realization via #DeviceState:realized property.
52 * The former may not fail (and must not abort or exit, since it is called
53 * during device introspection already), and the latter may return error
54 * information to the caller and must be re-entrant.
55 * Trivial field initializations should go into #TypeInfo.instance_init.
56 * Operations depending on @props static properties should go into @realize.
57 * After successful realization, setting static properties will fail.
59 * As an interim step, the #DeviceState:realized property can also be
60 * set with qdev_realize().
61 * In the future, devices will propagate this state change to their children
62 * and along busses they expose.
63 * The point in time will be deferred to machine creation, so that values
64 * set in @realize will not be introspectable beforehand. Therefore devices
65 * must not create children during @realize; they should initialize them via
66 * object_initialize() in their own #TypeInfo.instance_init and forward the
67 * realization events appropriately.
69 * Any type may override the @realize and/or @unrealize callbacks but needs
70 * to call the parent type's implementation if keeping their functionality
71 * is desired. Refer to QOM documentation for further discussion and examples.
75 * Since TYPE_DEVICE doesn't implement @realize and @unrealize, types
76 * derived directly from it need not call their parent's @realize and
78 * For other types consult the documentation and implementation of the
79 * respective parent types.
84 * To hide a device, a DeviceListener function should_be_hidden() needs to
86 * It can be used to defer adding a device and therefore hide it from the
87 * guest. The handler registering to this DeviceListener can save the QOpts
88 * passed to it for re-using it later and must return that it wants the device
89 * to be/remain hidden or not. When the handler function decides the device
90 * shall not be hidden it will be added in qdev_device_add() and
91 * realized as any other device. Otherwise qdev_device_add() will return early
92 * without adding the device. The guest will not see a "hidden" device
93 * until it was marked don't hide and qdev_device_add called again.
98 ObjectClass parent_class
;
101 DECLARE_BITMAP(categories
, DEVICE_CATEGORY_MAX
);
106 * The underscore at the end ensures a compile-time error if someone
107 * assigns to dc->props instead of using device_class_set_props.
112 * Can this device be instantiated with -device / device_add?
113 * All devices should support instantiation with device_add, and
114 * this flag should not exist. But we're not there, yet. Some
115 * devices fail to instantiate with cryptic error messages.
116 * Others instantiate, but don't work. Exposing users to such
117 * behavior would be cruel; clearing this flag will protect them.
118 * It should never be cleared without a comment explaining why it
120 * TODO remove once we're there
127 * Reset method here is deprecated and replaced by methods in the
128 * resettable class interface to implement a multi-phase reset.
129 * TODO: remove once every reset callback is unused
132 DeviceRealize realize
;
133 DeviceUnrealize unrealize
;
136 const VMStateDescription
*vmsd
;
138 /* Private to qdev / bus. */
139 const char *bus_type
;
142 typedef struct NamedGPIOList NamedGPIOList
;
144 struct NamedGPIOList
{
149 QLIST_ENTRY(NamedGPIOList
) node
;
152 typedef struct Clock Clock
;
153 typedef struct NamedClockList NamedClockList
;
155 struct NamedClockList
{
160 QLIST_ENTRY(NamedClockList
) node
;
165 * @realized: Indicates whether the device has been fully constructed.
166 * @reset: ResettableState for the device; handled by Resettable interface.
168 * This structure should not be accessed directly. We declare it here
169 * so that it can be embedded in individual device state structures.
177 char *canonical_path
;
179 bool pending_deleted_event
;
182 bool allow_unplug_during_migration
;
183 BusState
*parent_bus
;
184 QLIST_HEAD(, NamedGPIOList
) gpios
;
185 QLIST_HEAD(, NamedClockList
) clocks
;
186 QLIST_HEAD(, BusState
) child_bus
;
188 int instance_id_alias
;
189 int alias_required_for_version
;
190 ResettableState reset
;
193 struct DeviceListener
{
194 void (*realize
)(DeviceListener
*listener
, DeviceState
*dev
);
195 void (*unrealize
)(DeviceListener
*listener
, DeviceState
*dev
);
197 * This callback is called upon init of the DeviceState and allows to
198 * inform qdev that a device should be hidden, depending on the device
199 * opts, for example, to hide a standby device.
201 int (*should_be_hidden
)(DeviceListener
*listener
, QemuOpts
*device_opts
);
202 QTAILQ_ENTRY(DeviceListener
) link
;
205 #define TYPE_BUS "bus"
206 DECLARE_OBJ_CHECKERS(BusState
, BusClass
,
210 ObjectClass parent_class
;
212 /* FIXME first arg should be BusState */
213 void (*print_dev
)(Monitor
*mon
, DeviceState
*dev
, int indent
);
214 char *(*get_dev_path
)(DeviceState
*dev
);
216 * This callback is used to create Open Firmware device path in accordance
217 * with OF spec http://forthworks.com/standards/of1275.pdf. Individual bus
218 * bindings can be found at http://playground.sun.com/1275/bindings/.
220 char *(*get_fw_dev_path
)(DeviceState
*dev
);
221 void (*reset
)(BusState
*bus
);
223 BusUnrealize unrealize
;
225 /* maximum devices allowed on the bus, 0: no limit. */
227 /* number of automatically allocated bus ids (e.g. ide.0) */
231 typedef struct BusChild
{
234 QTAILQ_ENTRY(BusChild
) sibling
;
237 #define QDEV_HOTPLUG_HANDLER_PROPERTY "hotplug-handler"
241 * @hotplug_handler: link to a hotplug handler associated with bus.
242 * @reset: ResettableState for the bus; handled by Resettable interface.
248 HotplugHandler
*hotplug_handler
;
252 QTAILQ_HEAD(, BusChild
) children
;
253 QLIST_ENTRY(BusState
) sibling
;
254 ResettableState reset
;
259 * @set_default: true if the default value should be set from @defval,
260 * in which case @info->set_default_value must not be NULL
261 * (if false then no default value is set by the property system
262 * and the field retains whatever value it was given by instance_init).
263 * @defval: default value for the property. This is used only if @set_default
268 const PropertyInfo
*info
;
277 const PropertyInfo
*arrayinfo
;
279 const char *link_type
;
282 struct PropertyInfo
{
284 const char *description
;
285 const QEnumLookup
*enum_table
;
286 int (*print
)(DeviceState
*dev
, Property
*prop
, char *dest
, size_t len
);
287 void (*set_default_value
)(ObjectProperty
*op
, const Property
*prop
);
288 void (*create
)(ObjectClass
*oc
, Property
*prop
);
289 ObjectPropertyAccessor
*get
;
290 ObjectPropertyAccessor
*set
;
291 ObjectPropertyRelease
*release
;
296 * @used: Set to true if property was used when initializing a device.
297 * @optional: If set to true, GlobalProperty will be skipped without errors
298 * if the property doesn't exist.
300 * An error is fatal for non-hotplugged devices, when the global is applied.
302 typedef struct GlobalProperty
{
304 const char *property
;
311 compat_props_add(GPtrArray
*arr
,
312 GlobalProperty props
[], size_t nelem
)
315 for (i
= 0; i
< nelem
; i
++) {
316 g_ptr_array_add(arr
, (void *)&props
[i
]);
320 /*** Board API. This should go away once we have a machine config file. ***/
323 * qdev_new: Create a device on the heap
324 * @name: device type to create (we assert() that this type exists)
326 * This only allocates the memory and initializes the device state
327 * structure, ready for the caller to set properties if they wish.
328 * The device still needs to be realized.
329 * The returned object has a reference count of 1.
331 DeviceState
*qdev_new(const char *name
);
333 * qdev_try_new: Try to create a device on the heap
334 * @name: device type to create
336 * This is like qdev_new(), except it returns %NULL when type @name
337 * does not exist, rather than asserting.
339 DeviceState
*qdev_try_new(const char *name
);
341 * qdev_realize: Realize @dev.
342 * @dev: device to realize
343 * @bus: bus to plug it into (may be NULL)
344 * @errp: pointer to error object
346 * "Realize" the device, i.e. perform the second phase of device
348 * @dev must not be plugged into a bus already.
349 * If @bus, plug @dev into @bus. This takes a reference to @dev.
350 * If @dev has no QOM parent, make one up, taking another reference.
351 * On success, return true.
352 * On failure, store an error through @errp and return false.
354 * If you created @dev using qdev_new(), you probably want to use
355 * qdev_realize_and_unref() instead.
357 bool qdev_realize(DeviceState
*dev
, BusState
*bus
, Error
**errp
);
359 * qdev_realize_and_unref: Realize @dev and drop a reference
360 * @dev: device to realize
361 * @bus: bus to plug it into (may be NULL)
362 * @errp: pointer to error object
364 * Realize @dev and drop a reference.
365 * This is like qdev_realize(), except the caller must hold a
366 * (private) reference, which is dropped on return regardless of
367 * success or failure. Intended use::
371 * qdev_realize_and_unref(dev, bus, errp);
373 * Now @dev can go away without further ado.
375 * If you are embedding the device into some other QOM device and
376 * initialized it via some variant on object_initialize_child() then
377 * do not use this function, because that family of functions arrange
378 * for the only reference to the child device to be held by the parent
379 * via the child<> property, and so the reference-count-drop done here
380 * would be incorrect. For that use case you want qdev_realize().
382 bool qdev_realize_and_unref(DeviceState
*dev
, BusState
*bus
, Error
**errp
);
384 * qdev_unrealize: Unrealize a device
385 * @dev: device to unrealize
387 * This function will "unrealize" a device, which is the first phase
388 * of correctly destroying a device that has been realized. It will:
390 * - unrealize any child buses by calling qbus_unrealize()
391 * (this will recursively unrealize any devices on those buses)
392 * - call the the unrealize method of @dev
394 * The device can then be freed by causing its reference count to go
397 * Warning: most devices in QEMU do not expect to be unrealized. Only
398 * devices which are hot-unpluggable should be unrealized (as part of
399 * the unplugging process); all other devices are expected to last for
400 * the life of the simulation and should not be unrealized and freed.
402 void qdev_unrealize(DeviceState
*dev
);
403 void qdev_set_legacy_instance_id(DeviceState
*dev
, int alias_id
,
404 int required_for_version
);
405 HotplugHandler
*qdev_get_bus_hotplug_handler(DeviceState
*dev
);
406 HotplugHandler
*qdev_get_machine_hotplug_handler(DeviceState
*dev
);
407 bool qdev_hotplug_allowed(DeviceState
*dev
, Error
**errp
);
409 * qdev_get_hotplug_handler: Get handler responsible for device wiring
411 * Find HOTPLUG_HANDLER for @dev that provides [pre|un]plug callbacks for it.
413 * Note: in case @dev has a parent bus, it will be returned as handler unless
414 * machine handler overrides it.
416 * Returns: pointer to object that implements TYPE_HOTPLUG_HANDLER interface
417 * or NULL if there aren't any.
419 HotplugHandler
*qdev_get_hotplug_handler(DeviceState
*dev
);
420 void qdev_unplug(DeviceState
*dev
, Error
**errp
);
421 void qdev_simple_device_unplug_cb(HotplugHandler
*hotplug_dev
,
422 DeviceState
*dev
, Error
**errp
);
423 void qdev_machine_creation_done(void);
424 bool qdev_machine_modified(void);
427 * qdev_get_gpio_in: Get one of a device's anonymous input GPIO lines
428 * @dev: Device whose GPIO we want
429 * @n: Number of the anonymous GPIO line (which must be in range)
431 * Returns the qemu_irq corresponding to an anonymous input GPIO line
432 * (which the device has set up with qdev_init_gpio_in()). The index
433 * @n of the GPIO line must be valid (i.e. be at least 0 and less than
434 * the total number of anonymous input GPIOs the device has); this
435 * function will assert() if passed an invalid index.
437 * This function is intended to be used by board code or SoC "container"
438 * device models to wire up the GPIO lines; usually the return value
439 * will be passed to qdev_connect_gpio_out() or a similar function to
440 * connect another device's output GPIO line to this input.
442 * For named input GPIO lines, use qdev_get_gpio_in_named().
444 qemu_irq
qdev_get_gpio_in(DeviceState
*dev
, int n
);
446 * qdev_get_gpio_in_named: Get one of a device's named input GPIO lines
447 * @dev: Device whose GPIO we want
448 * @name: Name of the input GPIO array
449 * @n: Number of the GPIO line in that array (which must be in range)
451 * Returns the qemu_irq corresponding to a named input GPIO line
452 * (which the device has set up with qdev_init_gpio_in_named()).
453 * The @name string must correspond to an input GPIO array which exists on
454 * the device, and the index @n of the GPIO line must be valid (i.e.
455 * be at least 0 and less than the total number of input GPIOs in that
456 * array); this function will assert() if passed an invalid name or index.
458 * For anonymous input GPIO lines, use qdev_get_gpio_in().
460 qemu_irq
qdev_get_gpio_in_named(DeviceState
*dev
, const char *name
, int n
);
463 * qdev_connect_gpio_out: Connect one of a device's anonymous output GPIO lines
464 * @dev: Device whose GPIO to connect
465 * @n: Number of the anonymous output GPIO line (which must be in range)
466 * @pin: qemu_irq to connect the output line to
468 * This function connects an anonymous output GPIO line on a device
469 * up to an arbitrary qemu_irq, so that when the device asserts that
470 * output GPIO line, the qemu_irq's callback is invoked.
471 * The index @n of the GPIO line must be valid (i.e. be at least 0 and
472 * less than the total number of anonymous output GPIOs the device has
473 * created with qdev_init_gpio_out()); otherwise this function will assert().
475 * Outbound GPIO lines can be connected to any qemu_irq, but the common
476 * case is connecting them to another device's inbound GPIO line, using
477 * the qemu_irq returned by qdev_get_gpio_in() or qdev_get_gpio_in_named().
479 * It is not valid to try to connect one outbound GPIO to multiple
480 * qemu_irqs at once, or to connect multiple outbound GPIOs to the
481 * same qemu_irq. (Warning: there is no assertion or other guard to
482 * catch this error: the model will just not do the right thing.)
483 * Instead, for fan-out you can use the TYPE_IRQ_SPLIT device: connect
484 * a device's outbound GPIO to the splitter's input, and connect each
485 * of the splitter's outputs to a different device. For fan-in you
486 * can use the TYPE_OR_IRQ device, which is a model of a logical OR
487 * gate with multiple inputs and one output.
489 * For named output GPIO lines, use qdev_connect_gpio_out_named().
491 void qdev_connect_gpio_out(DeviceState
*dev
, int n
, qemu_irq pin
);
493 * qdev_connect_gpio_out: Connect one of a device's anonymous output GPIO lines
494 * @dev: Device whose GPIO to connect
495 * @name: Name of the output GPIO array
496 * @n: Number of the anonymous output GPIO line (which must be in range)
497 * @pin: qemu_irq to connect the output line to
499 * This function connects an anonymous output GPIO line on a device
500 * up to an arbitrary qemu_irq, so that when the device asserts that
501 * output GPIO line, the qemu_irq's callback is invoked.
502 * The @name string must correspond to an output GPIO array which exists on
503 * the device, and the index @n of the GPIO line must be valid (i.e.
504 * be at least 0 and less than the total number of input GPIOs in that
505 * array); this function will assert() if passed an invalid name or index.
507 * Outbound GPIO lines can be connected to any qemu_irq, but the common
508 * case is connecting them to another device's inbound GPIO line, using
509 * the qemu_irq returned by qdev_get_gpio_in() or qdev_get_gpio_in_named().
511 * It is not valid to try to connect one outbound GPIO to multiple
512 * qemu_irqs at once, or to connect multiple outbound GPIOs to the
513 * same qemu_irq; see qdev_connect_gpio_out() for details.
515 * For named output GPIO lines, use qdev_connect_gpio_out_named().
517 void qdev_connect_gpio_out_named(DeviceState
*dev
, const char *name
, int n
,
520 * qdev_get_gpio_out_connector: Get the qemu_irq connected to an output GPIO
521 * @dev: Device whose output GPIO we are interested in
522 * @name: Name of the output GPIO array
523 * @n: Number of the output GPIO line within that array
525 * Returns whatever qemu_irq is currently connected to the specified
526 * output GPIO line of @dev. This will be NULL if the output GPIO line
527 * has never been wired up to the anything. Note that the qemu_irq
528 * returned does not belong to @dev -- it will be the input GPIO or
529 * IRQ of whichever device the board code has connected up to @dev's
532 * You probably don't need to use this function -- it is used only
533 * by the platform-bus subsystem.
535 qemu_irq
qdev_get_gpio_out_connector(DeviceState
*dev
, const char *name
, int n
);
537 * qdev_intercept_gpio_out: Intercept an existing GPIO connection
538 * @dev: Device to intercept the outbound GPIO line from
539 * @icpt: New qemu_irq to connect instead
540 * @name: Name of the output GPIO array
541 * @n: Number of the GPIO line in the array
543 * This function is provided only for use by the qtest testing framework
544 * and is not suitable for use in non-testing parts of QEMU.
546 * This function breaks an existing connection of an outbound GPIO
547 * line from @dev, and replaces it with the new qemu_irq @icpt, as if
548 * ``qdev_connect_gpio_out_named(dev, icpt, name, n)`` had been called.
549 * The previously connected qemu_irq is returned, so it can be restored
550 * by a second call to qdev_intercept_gpio_out() if desired.
552 qemu_irq
qdev_intercept_gpio_out(DeviceState
*dev
, qemu_irq icpt
,
553 const char *name
, int n
);
555 BusState
*qdev_get_child_bus(DeviceState
*dev
, const char *name
);
557 /*** Device API. ***/
560 * qdev_init_gpio_in: create an array of anonymous input GPIO lines
561 * @dev: Device to create input GPIOs for
562 * @handler: Function to call when GPIO line value is set
563 * @n: Number of GPIO lines to create
565 * Devices should use functions in the qdev_init_gpio_in* family in
566 * their instance_init or realize methods to create any input GPIO
567 * lines they need. There is no functional difference between
568 * anonymous and named GPIO lines. Stylistically, named GPIOs are
569 * preferable (easier to understand at callsites) unless a device
570 * has exactly one uniform kind of GPIO input whose purpose is obvious.
571 * Note that input GPIO lines can serve as 'sinks' for IRQ lines.
573 * See qdev_get_gpio_in() for how code that uses such a device can get
574 * hold of an input GPIO line to manipulate it.
576 void qdev_init_gpio_in(DeviceState
*dev
, qemu_irq_handler handler
, int n
);
578 * qdev_init_gpio_out: create an array of anonymous output GPIO lines
579 * @dev: Device to create output GPIOs for
580 * @pins: Pointer to qemu_irq or qemu_irq array for the GPIO lines
581 * @n: Number of GPIO lines to create
583 * Devices should use functions in the qdev_init_gpio_out* family
584 * in their instance_init or realize methods to create any output
585 * GPIO lines they need. There is no functional difference between
586 * anonymous and named GPIO lines. Stylistically, named GPIOs are
587 * preferable (easier to understand at callsites) unless a device
588 * has exactly one uniform kind of GPIO output whose purpose is obvious.
590 * The @pins argument should be a pointer to either a "qemu_irq"
591 * (if @n == 1) or a "qemu_irq []" array (if @n > 1) in the device's
592 * state structure. The device implementation can then raise and
593 * lower the GPIO line by calling qemu_set_irq(). (If anything is
594 * connected to the other end of the GPIO this will cause the handler
595 * function for that input GPIO to be called.)
597 * See qdev_connect_gpio_out() for how code that uses such a device
598 * can connect to one of its output GPIO lines.
600 void qdev_init_gpio_out(DeviceState
*dev
, qemu_irq
*pins
, int n
);
602 * qdev_init_gpio_out: create an array of named output GPIO lines
603 * @dev: Device to create output GPIOs for
604 * @pins: Pointer to qemu_irq or qemu_irq array for the GPIO lines
605 * @name: Name to give this array of GPIO lines
606 * @n: Number of GPIO lines to create
608 * Like qdev_init_gpio_out(), but creates an array of GPIO output lines
609 * with a name. Code using the device can then connect these GPIO lines
610 * using qdev_connect_gpio_out_named().
612 void qdev_init_gpio_out_named(DeviceState
*dev
, qemu_irq
*pins
,
613 const char *name
, int n
);
615 * qdev_init_gpio_in_named_with_opaque: create an array of input GPIO lines
616 * for the specified device
618 * @dev: Device to create input GPIOs for
619 * @handler: Function to call when GPIO line value is set
620 * @opaque: Opaque data pointer to pass to @handler
621 * @name: Name of the GPIO input (must be unique for this device)
622 * @n: Number of GPIO lines in this input set
624 void qdev_init_gpio_in_named_with_opaque(DeviceState
*dev
,
625 qemu_irq_handler handler
,
627 const char *name
, int n
);
630 * qdev_init_gpio_in_named: create an array of input GPIO lines
631 * for the specified device
633 * Like qdev_init_gpio_in_named_with_opaque(), but the opaque pointer
634 * passed to the handler is @dev (which is the most commonly desired behaviour).
636 static inline void qdev_init_gpio_in_named(DeviceState
*dev
,
637 qemu_irq_handler handler
,
638 const char *name
, int n
)
640 qdev_init_gpio_in_named_with_opaque(dev
, handler
, dev
, name
, n
);
644 * qdev_pass_gpios: create GPIO lines on container which pass through to device
645 * @dev: Device which has GPIO lines
646 * @container: Container device which needs to expose them
647 * @name: Name of GPIO array to pass through (NULL for the anonymous GPIO array)
649 * In QEMU, complicated devices like SoCs are often modelled with a
650 * "container" QOM device which itself contains other QOM devices and
651 * which wires them up appropriately. This function allows the container
652 * to create GPIO arrays on itself which simply pass through to a GPIO
653 * array of one of its internal devices.
655 * If @dev has both input and output GPIOs named @name then both will
656 * be passed through. It is not possible to pass a subset of the array
657 * with this function.
659 * To users of the container device, the GPIO array created on @container
660 * behaves exactly like any other.
662 void qdev_pass_gpios(DeviceState
*dev
, DeviceState
*container
,
665 BusState
*qdev_get_parent_bus(DeviceState
*dev
);
669 DeviceState
*qdev_find_recursive(BusState
*bus
, const char *id
);
671 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
672 typedef int (qbus_walkerfn
)(BusState
*bus
, void *opaque
);
673 typedef int (qdev_walkerfn
)(DeviceState
*dev
, void *opaque
);
675 void qbus_create_inplace(void *bus
, size_t size
, const char *typename
,
676 DeviceState
*parent
, const char *name
);
677 BusState
*qbus_create(const char *typename
, DeviceState
*parent
, const char *name
);
678 bool qbus_realize(BusState
*bus
, Error
**errp
);
679 void qbus_unrealize(BusState
*bus
);
681 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
682 * < 0 if either devfn or busfn terminate walk somewhere in cursion,
684 int qbus_walk_children(BusState
*bus
,
685 qdev_walkerfn
*pre_devfn
, qbus_walkerfn
*pre_busfn
,
686 qdev_walkerfn
*post_devfn
, qbus_walkerfn
*post_busfn
,
688 int qdev_walk_children(DeviceState
*dev
,
689 qdev_walkerfn
*pre_devfn
, qbus_walkerfn
*pre_busfn
,
690 qdev_walkerfn
*post_devfn
, qbus_walkerfn
*post_busfn
,
695 * Reset @dev. See @qbus_reset_all() for more details.
697 * Note: This function is deprecated and will be removed when it becomes unused.
698 * Please use device_cold_reset() now.
700 void qdev_reset_all(DeviceState
*dev
);
701 void qdev_reset_all_fn(void *opaque
);
705 * @bus: Bus to be reset.
707 * Reset @bus and perform a bus-level ("hard") reset of all devices connected
708 * to it, including recursive processing of all buses below @bus itself. A
709 * hard reset means that qbus_reset_all will reset all state of the device.
710 * For PCI devices, for example, this will include the base address registers
711 * or configuration space.
713 * Note: This function is deprecated and will be removed when it becomes unused.
714 * Please use bus_cold_reset() now.
716 void qbus_reset_all(BusState
*bus
);
717 void qbus_reset_all_fn(void *opaque
);
721 * Reset device @dev and perform a recursive processing using the resettable
722 * interface. It triggers a RESET_TYPE_COLD.
724 void device_cold_reset(DeviceState
*dev
);
729 * Reset bus @bus and perform a recursive processing using the resettable
730 * interface. It triggers a RESET_TYPE_COLD.
732 void bus_cold_reset(BusState
*bus
);
735 * device_is_in_reset:
736 * Return true if the device @dev is currently being reset.
738 bool device_is_in_reset(DeviceState
*dev
);
742 * Return true if the bus @bus is currently being reset.
744 bool bus_is_in_reset(BusState
*bus
);
746 /* This should go away once we get rid of the NULL bus hack */
747 BusState
*sysbus_get_default(void);
749 char *qdev_get_fw_dev_path(DeviceState
*dev
);
750 char *qdev_get_own_fw_dev_path_from_handler(BusState
*bus
, DeviceState
*dev
);
755 * Initialize platform devices before machine init. This is a hack until full
756 * support for composition is added.
758 void qdev_machine_init(void);
761 * device_legacy_reset:
763 * Reset a single device (by calling the reset method).
764 * Note: This function is deprecated and will be removed when it becomes unused.
765 * Please use device_cold_reset() now.
767 void device_legacy_reset(DeviceState
*dev
);
769 void device_class_set_props(DeviceClass
*dc
, Property
*props
);
772 * device_class_set_parent_reset:
773 * TODO: remove the function when DeviceClass's reset method
774 * is not used anymore.
776 void device_class_set_parent_reset(DeviceClass
*dc
,
777 DeviceReset dev_reset
,
778 DeviceReset
*parent_reset
);
779 void device_class_set_parent_realize(DeviceClass
*dc
,
780 DeviceRealize dev_realize
,
781 DeviceRealize
*parent_realize
);
782 void device_class_set_parent_unrealize(DeviceClass
*dc
,
783 DeviceUnrealize dev_unrealize
,
784 DeviceUnrealize
*parent_unrealize
);
786 const VMStateDescription
*qdev_get_vmsd(DeviceState
*dev
);
788 const char *qdev_fw_name(DeviceState
*dev
);
790 Object
*qdev_get_machine(void);
792 /* FIXME: make this a link<> */
793 void qdev_set_parent_bus(DeviceState
*dev
, BusState
*bus
);
795 extern bool qdev_hotplug
;
796 extern bool qdev_hot_removed
;
798 char *qdev_get_dev_path(DeviceState
*dev
);
800 void qbus_set_hotplug_handler(BusState
*bus
, Object
*handler
);
801 void qbus_set_bus_hotplug_handler(BusState
*bus
);
803 static inline bool qbus_is_hotpluggable(BusState
*bus
)
805 return bus
->hotplug_handler
;
808 void device_listener_register(DeviceListener
*listener
);
809 void device_listener_unregister(DeviceListener
*listener
);
812 * @qdev_should_hide_device:
813 * @opts: QemuOpts as passed on cmdline.
815 * Check if a device should be added.
816 * When a device is added via qdev_device_add() this will be called,
817 * and return if the device should be added now or not.
819 bool qdev_should_hide_device(QemuOpts
*opts
);