5 #include "qemu-queue.h"
7 #include "qemu-option.h"
8 #include "qapi/qapi-visit-core.h"
9 #include "qemu/object.h"
11 typedef struct Property Property;
13 typedef struct PropertyInfo PropertyInfo;
15 typedef struct CompatProperty CompatProperty;
17 typedef struct DeviceInfo DeviceInfo;
19 typedef struct BusState BusState;
21 typedef struct BusInfo BusInfo;
24 DEV_STATE_CREATED = 1,
25 DEV_STATE_INITIALIZED,
29 DEV_NVECTORS_UNSPECIFIED = -1,
33 * @DevicePropertyAccessor - called when trying to get/set a property
35 * @dev the device that owns the property
36 * @v the visitor that contains the property data
37 * @opaque the device property opaque
38 * @name the name of the property
39 * @errp a pointer to an Error that is filled if getting/setting fails.
41 typedef void (DevicePropertyAccessor)(DeviceState *dev,
48 * @DevicePropertyRelease - called when a property is removed from a device
50 * @dev the device that owns the property
51 * @name the name of the property
52 * @opaque the opaque registered with the property
54 typedef void (DevicePropertyRelease)(DeviceState *dev,
58 typedef struct DeviceProperty
62 DevicePropertyAccessor *get;
63 DevicePropertyAccessor *set;
64 DevicePropertyRelease *release;
67 QTAILQ_ENTRY(DeviceProperty) node;
70 #define TYPE_DEVICE "device"
71 #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE)
72 #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE)
73 #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE)
75 typedef struct DeviceClass {
76 ObjectClass parent_class;
78 void (*reset)(DeviceState *dev);
81 /* This structure should not be accessed directly. We declare it here
82 so that it can be embedded in individual device state structures. */
95 QLIST_HEAD(, BusState) child_bus;
97 QTAILQ_ENTRY(DeviceState) sibling;
98 int instance_id_alias;
99 int alias_required_for_version;
102 * This tracks the number of references between devices. See @qdev_ref for
107 QTAILQ_HEAD(, DeviceProperty) properties;
109 /* Do not, under any circumstance, use this parent link below anywhere
110 * outside of qdev.c. You have been warned. */
114 typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent);
115 typedef char *(*bus_get_dev_path)(DeviceState *dev);
117 * This callback is used to create Open Firmware device path in accordance with
118 * OF spec http://forthworks.com/standards/of1275.pdf. Indicidual bus bindings
119 * can be found here http://playground.sun.com/1275/bindings/.
121 typedef char *(*bus_get_fw_dev_path)(DeviceState *dev);
122 typedef int (qbus_resetfn)(BusState *bus);
127 bus_dev_printfn print_dev;
128 bus_get_dev_path get_dev_path;
129 bus_get_fw_dev_path get_fw_dev_path;
140 QTAILQ_HEAD(ChildrenHead, DeviceState) children;
141 QLIST_ENTRY(BusState) sibling;
153 PROP_TYPE_UNSPEC = 0,
170 struct PropertyInfo {
172 const char *legacy_name;
174 enum PropertyType type;
177 int (*parse)(DeviceState *dev, Property *prop, const char *str);
178 int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
179 void (*free)(DeviceState *dev, Property *prop);
180 DevicePropertyAccessor *get;
181 DevicePropertyAccessor *set;
184 typedef struct GlobalProperty {
186 const char *property;
188 QTAILQ_ENTRY(GlobalProperty) next;
191 /*** Board API. This should go away once we have a machine config file. ***/
193 DeviceState *qdev_create(BusState *bus, const char *name);
194 DeviceState *qdev_try_create(BusState *bus, const char *name);
195 bool qdev_exists(const char *name);
196 int qdev_device_help(QemuOpts *opts);
197 DeviceState *qdev_device_add(QemuOpts *opts);
198 int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT;
199 void qdev_init_nofail(DeviceState *dev);
200 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
201 int required_for_version);
202 int qdev_unplug(DeviceState *dev);
203 void qdev_free(DeviceState *dev);
204 int qdev_simple_unplug_cb(DeviceState *dev);
205 void qdev_machine_creation_done(void);
206 bool qdev_machine_modified(void);
208 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
209 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
211 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
213 /*** Device API. ***/
215 typedef int (*qdev_initfn)(DeviceState *dev, DeviceInfo *info);
216 typedef int (*qdev_event)(DeviceState *dev);
217 typedef void (*qdev_resetfn)(DeviceState *dev);
232 const VMStateDescription *vmsd;
234 /* Private to qdev / bus. */
239 struct DeviceInfo *next;
241 extern DeviceInfo *device_info_list;
243 void qdev_register(DeviceInfo *info);
245 /* Register device properties. */
246 /* GPIO inputs also double as IRQ sinks. */
247 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
248 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
250 CharDriverState *qdev_init_chardev(DeviceState *dev);
252 BusState *qdev_get_parent_bus(DeviceState *dev);
256 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
258 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
259 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
260 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
262 void qbus_create_inplace(BusState *bus, BusInfo *info,
263 DeviceState *parent, const char *name);
264 BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name);
265 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
266 * < 0 if either devfn or busfn terminate walk somewhere in cursion,
268 int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
269 qbus_walkerfn *busfn, void *opaque);
270 int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
271 qbus_walkerfn *busfn, void *opaque);
272 void qdev_reset_all(DeviceState *dev);
273 void qbus_reset_all_fn(void *opaque);
275 void qbus_free(BusState *bus);
277 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
279 /* This should go away once we get rid of the NULL bus hack */
280 BusState *sysbus_get_default(void);
282 /*** monitor commands ***/
284 void do_info_qtree(Monitor *mon);
285 void do_info_qdm(Monitor *mon);
286 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
287 int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
289 /*** qdev-properties.c ***/
291 extern PropertyInfo qdev_prop_bit;
292 extern PropertyInfo qdev_prop_uint8;
293 extern PropertyInfo qdev_prop_uint16;
294 extern PropertyInfo qdev_prop_uint32;
295 extern PropertyInfo qdev_prop_int32;
296 extern PropertyInfo qdev_prop_uint64;
297 extern PropertyInfo qdev_prop_hex8;
298 extern PropertyInfo qdev_prop_hex32;
299 extern PropertyInfo qdev_prop_hex64;
300 extern PropertyInfo qdev_prop_string;
301 extern PropertyInfo qdev_prop_chr;
302 extern PropertyInfo qdev_prop_ptr;
303 extern PropertyInfo qdev_prop_macaddr;
304 extern PropertyInfo qdev_prop_drive;
305 extern PropertyInfo qdev_prop_netdev;
306 extern PropertyInfo qdev_prop_vlan;
307 extern PropertyInfo qdev_prop_pci_devfn;
309 #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
312 .offset = offsetof(_state, _field) \
313 + type_check(_type,typeof_field(_state, _field)), \
315 #define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \
318 .offset = offsetof(_state, _field) \
319 + type_check(_type,typeof_field(_state, _field)), \
320 .defval = (_type[]) { _defval }, \
322 #define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) { \
324 .info = &(qdev_prop_bit), \
326 .offset = offsetof(_state, _field) \
327 + type_check(uint32_t,typeof_field(_state, _field)), \
328 .defval = (bool[]) { (_defval) }, \
331 #define DEFINE_PROP_UINT8(_n, _s, _f, _d) \
332 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
333 #define DEFINE_PROP_UINT16(_n, _s, _f, _d) \
334 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
335 #define DEFINE_PROP_UINT32(_n, _s, _f, _d) \
336 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
337 #define DEFINE_PROP_INT32(_n, _s, _f, _d) \
338 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t)
339 #define DEFINE_PROP_UINT64(_n, _s, _f, _d) \
340 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
341 #define DEFINE_PROP_HEX8(_n, _s, _f, _d) \
342 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex8, uint8_t)
343 #define DEFINE_PROP_HEX32(_n, _s, _f, _d) \
344 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t)
345 #define DEFINE_PROP_HEX64(_n, _s, _f, _d) \
346 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t)
347 #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \
348 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, uint32_t)
350 #define DEFINE_PROP_PTR(_n, _s, _f) \
351 DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
352 #define DEFINE_PROP_CHR(_n, _s, _f) \
353 DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
354 #define DEFINE_PROP_STRING(_n, _s, _f) \
355 DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
356 #define DEFINE_PROP_NETDEV(_n, _s, _f) \
357 DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*)
358 #define DEFINE_PROP_VLAN(_n, _s, _f) \
359 DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*)
360 #define DEFINE_PROP_DRIVE(_n, _s, _f) \
361 DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *)
362 #define DEFINE_PROP_MACADDR(_n, _s, _f) \
363 DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
365 #define DEFINE_PROP_END_OF_LIST() \
368 /* Set properties between creation and init. */
369 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);
370 int qdev_prop_exists(DeviceState *dev, const char *name);
371 int qdev_prop_parse(DeviceState *dev, const char *name, const char *value);
372 void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyType type);
373 void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value);
374 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value);
375 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value);
376 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value);
377 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value);
378 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value);
379 void qdev_prop_set_string(DeviceState *dev, const char *name, char *value);
380 void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value);
381 void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value);
382 void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value);
383 int qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value) QEMU_WARN_UNUSED_RESULT;
384 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name, BlockDriverState *value);
385 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
386 /* FIXME: Remove opaque pointer properties. */
387 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
388 void qdev_prop_set_defaults(DeviceState *dev, Property *props);
390 void qdev_prop_register_global_list(GlobalProperty *props);
391 void qdev_prop_set_globals(DeviceState *dev);
392 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
393 Property *prop, const char *value);
395 DeviceInfo *qdev_get_info(DeviceState *dev);
397 static inline const char *qdev_fw_name(DeviceState *dev)
399 DeviceInfo *info = qdev_get_info(dev);
402 return info->fw_name;
403 } else if (info->alias) {
407 return object_get_typename(OBJECT(dev));
410 char *qdev_get_fw_dev_path(DeviceState *dev);
411 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
412 extern struct BusInfo system_bus_info;
417 * Increase the reference count of a device. A device cannot be freed as long
418 * as its reference count is greater than zero.
422 void qdev_ref(DeviceState *dev);
427 * Decrease the reference count of a device. A device cannot be freed as long
428 * as its reference count is greater than zero.
432 void qdev_unref(DeviceState *dev);
435 * @qdev_property_add - add a new property to a device
437 * @dev - the device to add a property to
439 * @name - the name of the property. This can contain any character except for
440 * a forward slash. In general, you should use hyphens '-' instead of
441 * underscores '_' when naming properties.
443 * @type - the type name of the property. This namespace is pretty loosely
444 * defined. Sub namespaces are constructed by using a prefix and then
445 * to angle brackets. For instance, the type 'virtio-net-pci' in the
446 * 'link' namespace would be 'link<virtio-net-pci>'.
448 * @get - the getter to be called to read a property. If this is NULL, then
449 * the property cannot be read.
451 * @set - the setter to be called to write a property. If this is NULL,
452 * then the property cannot be written.
454 * @release - called when the property is removed from the device. This is
455 * meant to allow a property to free its opaque upon device
456 * destruction. This may be NULL.
458 * @opaque - an opaque pointer to pass to the callbacks for the property
460 * @errp - returns an error if this function fails
462 void qdev_property_add(DeviceState *dev, const char *name, const char *type,
463 DevicePropertyAccessor *get, DevicePropertyAccessor *set,
464 DevicePropertyRelease *release,
465 void *opaque, Error **errp);
468 * @qdev_property_get - reads a property from a device
472 * @v - the visitor that will receive the property value. This should be an
473 * Output visitor and the data will be written with @name as the name.
475 * @name - the name of the property
477 * @errp - returns an error if this function fails
479 void qdev_property_get(DeviceState *dev, Visitor *v, const char *name,
483 * @qdev_property_set - writes a property to a device
487 * @v - the visitor that will be used to write the property value. This should
488 * be an Input visitor and the data will be first read with @name as the
489 * name and then written as the property value.
491 * @name - the name of the property
493 * @errp - returns an error if this function fails
495 void qdev_property_set(DeviceState *dev, Visitor *v, const char *name,
499 * @qdev_property_get_type - returns the type of a property
503 * @name - the name of the property
505 * @errp - returns an error if this function fails
508 * The type name of the property.
510 const char *qdev_property_get_type(DeviceState *dev, const char *name,
514 * @qdev_property_add_static - add a @Property to a device referencing a
517 void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp);
520 * @qdev_get_root - returns the root device of the composition tree
523 * The root of the composition tree.
525 DeviceState *qdev_get_root(void);
528 * @qdev_get_canonical_path - returns the canonical path for a device. This
529 * is the path within the composition tree starting from the root.
532 * The canonical path in the composition tree.
534 gchar *qdev_get_canonical_path(DeviceState *dev);
537 * @qdev_resolve_path - resolves a path returning a device
539 * There are two types of supported paths--absolute paths and partial paths.
541 * Absolute paths are derived from the root device and can follow child<> or
542 * link<> properties. Since they can follow link<> properties, they can be
543 * arbitrarily long. Absolute paths look like absolute filenames and are
544 * prefixed with a leading slash.
546 * Partial paths look like relative filenames. They do not begin with a
547 * prefix. The matching rules for partial paths are subtle but designed to make
548 * specifying devices easy. At each level of the composition tree, the partial
549 * path is matched as an absolute path. The first match is not returned. At
550 * least two matches are searched for. A successful result is only returned if
551 * only one match is founded. If more than one match is found, a flag is
552 * return to indicate that the match was ambiguous.
554 * @path - the path to resolve
556 * @ambiguous - returns true if the path resolution failed because of an
560 * The matched device or NULL on path lookup failure.
562 DeviceState *qdev_resolve_path(const char *path, bool *ambiguous);
565 * @qdev_property_add_child - Add a child property to a device
567 * Child properties form the composition tree. All devices need to be a child
568 * of another device. Devices can only be a child of one device.
570 * There is no way for a child to determine what its parent is. It is not
571 * a bidirectional relationship. This is by design.
573 * @dev - the device to add a property to
575 * @name - the name of the property
577 * @child - the child device
579 * @errp - if an error occurs, a pointer to an area to store the area
581 void qdev_property_add_child(DeviceState *dev, const char *name,
582 DeviceState *child, Error **errp);
585 * @qdev_property_add_link - Add a link property to a device
587 * Links establish relationships between devices. Links are unidirectional
588 * although two links can be combined to form a bidirectional relationship
591 * Links form the graph in the device model.
593 * @dev - the device to add a property to
595 * @name - the name of the property
597 * @type - the qdev type of the link
599 * @child - a pointer to where the link device reference is stored
601 * @errp - if an error occurs, a pointer to an area to store the area
603 void qdev_property_add_link(DeviceState *dev, const char *name,
604 const char *type, DeviceState **child,
608 * @qdev_property_add_str
610 * Add a string property using getters/setters. This function will add a
611 * property of type 'string'.
613 * @dev - the device to add a property to
615 * @name - the name of the property
617 * @get - the getter or NULL if the property is write-only. This function must
618 * return a string to be freed by @g_free().
620 * @set - the setter or NULL if the property is read-only
622 * @errp - if an error occurs, a pointer to an area to store the error
624 void qdev_property_add_str(DeviceState *dev, const char *name,
625 char *(*get)(DeviceState *, Error **),
626 void (*set)(DeviceState *, const char *, Error **),
632 * Returns the string representation of the type of this object.
636 * @errp - if an error occurs, a pointer to an area to store the error
638 * Returns: a string representing the type. This must be freed by the caller
641 char *qdev_get_type(DeviceState *dev, Error **errp);
646 * Initialize platform devices before machine init. This is a hack until full
647 * support for composition is added.
649 void qdev_machine_init(void);
654 * Reset a single device (by calling the reset method).
656 void device_reset(DeviceState *dev);