qdev: don't access name through info
[qemu.git] / hw / qdev.h
1 #ifndef QDEV_H
2 #define QDEV_H
3
4 #include "hw.h"
5 #include "qemu-queue.h"
6 #include "qemu-char.h"
7 #include "qemu-option.h"
8 #include "qapi/qapi-visit-core.h"
9 #include "qemu/object.h"
10
11 typedef struct Property Property;
12
13 typedef struct PropertyInfo PropertyInfo;
14
15 typedef struct CompatProperty CompatProperty;
16
17 typedef struct DeviceInfo DeviceInfo;
18
19 typedef struct BusState BusState;
20
21 typedef struct BusInfo BusInfo;
22
23 enum DevState {
24 DEV_STATE_CREATED = 1,
25 DEV_STATE_INITIALIZED,
26 };
27
28 enum {
29 DEV_NVECTORS_UNSPECIFIED = -1,
30 };
31
32 /**
33 * @DevicePropertyAccessor - called when trying to get/set a property
34 *
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.
40 */
41 typedef void (DevicePropertyAccessor)(DeviceState *dev,
42 Visitor *v,
43 void *opaque,
44 const char *name,
45 Error **errp);
46
47 /**
48 * @DevicePropertyRelease - called when a property is removed from a device
49 *
50 * @dev the device that owns the property
51 * @name the name of the property
52 * @opaque the opaque registered with the property
53 */
54 typedef void (DevicePropertyRelease)(DeviceState *dev,
55 const char *name,
56 void *opaque);
57
58 typedef struct DeviceProperty
59 {
60 gchar *name;
61 gchar *type;
62 DevicePropertyAccessor *get;
63 DevicePropertyAccessor *set;
64 DevicePropertyRelease *release;
65 void *opaque;
66
67 QTAILQ_ENTRY(DeviceProperty) node;
68 } DeviceProperty;
69
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)
74
75 typedef struct DeviceClass {
76 ObjectClass parent_class;
77 DeviceInfo *info;
78 } DeviceClass;
79
80 /* This structure should not be accessed directly. We declare it here
81 so that it can be embedded in individual device state structures. */
82 struct DeviceState {
83 Object parent_obj;
84
85 const char *id;
86 enum DevState state;
87 QemuOpts *opts;
88 int hotplugged;
89 BusState *parent_bus;
90 int num_gpio_out;
91 qemu_irq *gpio_out;
92 int num_gpio_in;
93 qemu_irq *gpio_in;
94 QLIST_HEAD(, BusState) child_bus;
95 int num_child_bus;
96 QTAILQ_ENTRY(DeviceState) sibling;
97 int instance_id_alias;
98 int alias_required_for_version;
99
100 /**
101 * This tracks the number of references between devices. See @qdev_ref for
102 * more information.
103 */
104 uint32_t ref;
105
106 QTAILQ_HEAD(, DeviceProperty) properties;
107
108 /* Do not, under any circumstance, use this parent link below anywhere
109 * outside of qdev.c. You have been warned. */
110 DeviceState *parent;
111 };
112
113 typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent);
114 typedef char *(*bus_get_dev_path)(DeviceState *dev);
115 /*
116 * This callback is used to create Open Firmware device path in accordance with
117 * OF spec http://forthworks.com/standards/of1275.pdf. Indicidual bus bindings
118 * can be found here http://playground.sun.com/1275/bindings/.
119 */
120 typedef char *(*bus_get_fw_dev_path)(DeviceState *dev);
121 typedef int (qbus_resetfn)(BusState *bus);
122
123 struct BusInfo {
124 const char *name;
125 size_t size;
126 bus_dev_printfn print_dev;
127 bus_get_dev_path get_dev_path;
128 bus_get_fw_dev_path get_fw_dev_path;
129 qbus_resetfn *reset;
130 Property *props;
131 };
132
133 struct BusState {
134 DeviceState *parent;
135 BusInfo *info;
136 const char *name;
137 int allow_hotplug;
138 int qdev_allocated;
139 QTAILQ_HEAD(ChildrenHead, DeviceState) children;
140 QLIST_ENTRY(BusState) sibling;
141 };
142
143 struct Property {
144 const char *name;
145 PropertyInfo *info;
146 int offset;
147 int bitnr;
148 void *defval;
149 };
150
151 enum PropertyType {
152 PROP_TYPE_UNSPEC = 0,
153 PROP_TYPE_UINT8,
154 PROP_TYPE_UINT16,
155 PROP_TYPE_UINT32,
156 PROP_TYPE_INT32,
157 PROP_TYPE_UINT64,
158 PROP_TYPE_TADDR,
159 PROP_TYPE_MACADDR,
160 PROP_TYPE_DRIVE,
161 PROP_TYPE_CHR,
162 PROP_TYPE_STRING,
163 PROP_TYPE_NETDEV,
164 PROP_TYPE_VLAN,
165 PROP_TYPE_PTR,
166 PROP_TYPE_BIT,
167 };
168
169 struct PropertyInfo {
170 const char *name;
171 const char *legacy_name;
172 size_t size;
173 enum PropertyType type;
174 int64_t min;
175 int64_t max;
176 int (*parse)(DeviceState *dev, Property *prop, const char *str);
177 int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
178 void (*free)(DeviceState *dev, Property *prop);
179 DevicePropertyAccessor *get;
180 DevicePropertyAccessor *set;
181 };
182
183 typedef struct GlobalProperty {
184 const char *driver;
185 const char *property;
186 const char *value;
187 QTAILQ_ENTRY(GlobalProperty) next;
188 } GlobalProperty;
189
190 /*** Board API. This should go away once we have a machine config file. ***/
191
192 DeviceState *qdev_create(BusState *bus, const char *name);
193 DeviceState *qdev_try_create(BusState *bus, const char *name);
194 bool qdev_exists(const char *name);
195 int qdev_device_help(QemuOpts *opts);
196 DeviceState *qdev_device_add(QemuOpts *opts);
197 int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT;
198 void qdev_init_nofail(DeviceState *dev);
199 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
200 int required_for_version);
201 int qdev_unplug(DeviceState *dev);
202 void qdev_free(DeviceState *dev);
203 int qdev_simple_unplug_cb(DeviceState *dev);
204 void qdev_machine_creation_done(void);
205 bool qdev_machine_modified(void);
206
207 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
208 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
209
210 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
211
212 /*** Device API. ***/
213
214 typedef int (*qdev_initfn)(DeviceState *dev, DeviceInfo *info);
215 typedef int (*qdev_event)(DeviceState *dev);
216 typedef void (*qdev_resetfn)(DeviceState *dev);
217
218 struct DeviceInfo {
219 const char *name;
220 const char *fw_name;
221 const char *alias;
222 const char *desc;
223 size_t size;
224 Property *props;
225 int no_user;
226
227 /* callbacks */
228 qdev_resetfn reset;
229
230 /* device state */
231 const VMStateDescription *vmsd;
232
233 /* Private to qdev / bus. */
234 qdev_initfn init;
235 qdev_event unplug;
236 qdev_event exit;
237 BusInfo *bus_info;
238 struct DeviceInfo *next;
239 };
240 extern DeviceInfo *device_info_list;
241
242 void qdev_register(DeviceInfo *info);
243
244 /* Register device properties. */
245 /* GPIO inputs also double as IRQ sinks. */
246 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
247 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
248
249 CharDriverState *qdev_init_chardev(DeviceState *dev);
250
251 BusState *qdev_get_parent_bus(DeviceState *dev);
252
253 /*** BUS API. ***/
254
255 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
256
257 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
258 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
259 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
260
261 void qbus_create_inplace(BusState *bus, BusInfo *info,
262 DeviceState *parent, const char *name);
263 BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name);
264 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
265 * < 0 if either devfn or busfn terminate walk somewhere in cursion,
266 * 0 otherwise. */
267 int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
268 qbus_walkerfn *busfn, void *opaque);
269 int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
270 qbus_walkerfn *busfn, void *opaque);
271 void qdev_reset_all(DeviceState *dev);
272 void qbus_reset_all_fn(void *opaque);
273
274 void qbus_free(BusState *bus);
275
276 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
277
278 /* This should go away once we get rid of the NULL bus hack */
279 BusState *sysbus_get_default(void);
280
281 /*** monitor commands ***/
282
283 void do_info_qtree(Monitor *mon);
284 void do_info_qdm(Monitor *mon);
285 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
286 int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
287
288 /*** qdev-properties.c ***/
289
290 extern PropertyInfo qdev_prop_bit;
291 extern PropertyInfo qdev_prop_uint8;
292 extern PropertyInfo qdev_prop_uint16;
293 extern PropertyInfo qdev_prop_uint32;
294 extern PropertyInfo qdev_prop_int32;
295 extern PropertyInfo qdev_prop_uint64;
296 extern PropertyInfo qdev_prop_hex8;
297 extern PropertyInfo qdev_prop_hex32;
298 extern PropertyInfo qdev_prop_hex64;
299 extern PropertyInfo qdev_prop_string;
300 extern PropertyInfo qdev_prop_chr;
301 extern PropertyInfo qdev_prop_ptr;
302 extern PropertyInfo qdev_prop_macaddr;
303 extern PropertyInfo qdev_prop_drive;
304 extern PropertyInfo qdev_prop_netdev;
305 extern PropertyInfo qdev_prop_vlan;
306 extern PropertyInfo qdev_prop_pci_devfn;
307
308 #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
309 .name = (_name), \
310 .info = &(_prop), \
311 .offset = offsetof(_state, _field) \
312 + type_check(_type,typeof_field(_state, _field)), \
313 }
314 #define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \
315 .name = (_name), \
316 .info = &(_prop), \
317 .offset = offsetof(_state, _field) \
318 + type_check(_type,typeof_field(_state, _field)), \
319 .defval = (_type[]) { _defval }, \
320 }
321 #define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) { \
322 .name = (_name), \
323 .info = &(qdev_prop_bit), \
324 .bitnr = (_bit), \
325 .offset = offsetof(_state, _field) \
326 + type_check(uint32_t,typeof_field(_state, _field)), \
327 .defval = (bool[]) { (_defval) }, \
328 }
329
330 #define DEFINE_PROP_UINT8(_n, _s, _f, _d) \
331 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
332 #define DEFINE_PROP_UINT16(_n, _s, _f, _d) \
333 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
334 #define DEFINE_PROP_UINT32(_n, _s, _f, _d) \
335 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
336 #define DEFINE_PROP_INT32(_n, _s, _f, _d) \
337 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t)
338 #define DEFINE_PROP_UINT64(_n, _s, _f, _d) \
339 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
340 #define DEFINE_PROP_HEX8(_n, _s, _f, _d) \
341 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex8, uint8_t)
342 #define DEFINE_PROP_HEX32(_n, _s, _f, _d) \
343 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t)
344 #define DEFINE_PROP_HEX64(_n, _s, _f, _d) \
345 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t)
346 #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \
347 DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, uint32_t)
348
349 #define DEFINE_PROP_PTR(_n, _s, _f) \
350 DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
351 #define DEFINE_PROP_CHR(_n, _s, _f) \
352 DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
353 #define DEFINE_PROP_STRING(_n, _s, _f) \
354 DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
355 #define DEFINE_PROP_NETDEV(_n, _s, _f) \
356 DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*)
357 #define DEFINE_PROP_VLAN(_n, _s, _f) \
358 DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*)
359 #define DEFINE_PROP_DRIVE(_n, _s, _f) \
360 DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *)
361 #define DEFINE_PROP_MACADDR(_n, _s, _f) \
362 DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
363
364 #define DEFINE_PROP_END_OF_LIST() \
365 {}
366
367 /* Set properties between creation and init. */
368 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);
369 int qdev_prop_exists(DeviceState *dev, const char *name);
370 int qdev_prop_parse(DeviceState *dev, const char *name, const char *value);
371 void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyType type);
372 void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value);
373 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value);
374 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value);
375 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value);
376 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value);
377 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value);
378 void qdev_prop_set_string(DeviceState *dev, const char *name, char *value);
379 void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value);
380 void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value);
381 void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value);
382 int qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value) QEMU_WARN_UNUSED_RESULT;
383 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name, BlockDriverState *value);
384 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
385 /* FIXME: Remove opaque pointer properties. */
386 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
387 void qdev_prop_set_defaults(DeviceState *dev, Property *props);
388
389 void qdev_prop_register_global_list(GlobalProperty *props);
390 void qdev_prop_set_globals(DeviceState *dev);
391 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
392 Property *prop, const char *value);
393
394 DeviceInfo *qdev_get_info(DeviceState *dev);
395
396 static inline const char *qdev_fw_name(DeviceState *dev)
397 {
398 DeviceInfo *info = qdev_get_info(dev);
399
400 if (info->fw_name) {
401 return info->fw_name;
402 } else if (info->alias) {
403 return info->alias;
404 }
405
406 return object_get_typename(OBJECT(dev));
407 }
408
409 char *qdev_get_fw_dev_path(DeviceState *dev);
410 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
411 extern struct BusInfo system_bus_info;
412
413 /**
414 * @qdev_ref
415 *
416 * Increase the reference count of a device. A device cannot be freed as long
417 * as its reference count is greater than zero.
418 *
419 * @dev - the device
420 */
421 void qdev_ref(DeviceState *dev);
422
423 /**
424 * @qdef_unref
425 *
426 * Decrease the reference count of a device. A device cannot be freed as long
427 * as its reference count is greater than zero.
428 *
429 * @dev - the device
430 */
431 void qdev_unref(DeviceState *dev);
432
433 /**
434 * @qdev_property_add - add a new property to a device
435 *
436 * @dev - the device to add a property to
437 *
438 * @name - the name of the property. This can contain any character except for
439 * a forward slash. In general, you should use hyphens '-' instead of
440 * underscores '_' when naming properties.
441 *
442 * @type - the type name of the property. This namespace is pretty loosely
443 * defined. Sub namespaces are constructed by using a prefix and then
444 * to angle brackets. For instance, the type 'virtio-net-pci' in the
445 * 'link' namespace would be 'link<virtio-net-pci>'.
446 *
447 * @get - the getter to be called to read a property. If this is NULL, then
448 * the property cannot be read.
449 *
450 * @set - the setter to be called to write a property. If this is NULL,
451 * then the property cannot be written.
452 *
453 * @release - called when the property is removed from the device. This is
454 * meant to allow a property to free its opaque upon device
455 * destruction. This may be NULL.
456 *
457 * @opaque - an opaque pointer to pass to the callbacks for the property
458 *
459 * @errp - returns an error if this function fails
460 */
461 void qdev_property_add(DeviceState *dev, const char *name, const char *type,
462 DevicePropertyAccessor *get, DevicePropertyAccessor *set,
463 DevicePropertyRelease *release,
464 void *opaque, Error **errp);
465
466 /**
467 * @qdev_property_get - reads a property from a device
468 *
469 * @dev - the device
470 *
471 * @v - the visitor that will receive the property value. This should be an
472 * Output visitor and the data will be written with @name as the name.
473 *
474 * @name - the name of the property
475 *
476 * @errp - returns an error if this function fails
477 */
478 void qdev_property_get(DeviceState *dev, Visitor *v, const char *name,
479 Error **errp);
480
481 /**
482 * @qdev_property_set - writes a property to a device
483 *
484 * @dev - the device
485 *
486 * @v - the visitor that will be used to write the property value. This should
487 * be an Input visitor and the data will be first read with @name as the
488 * name and then written as the property value.
489 *
490 * @name - the name of the property
491 *
492 * @errp - returns an error if this function fails
493 */
494 void qdev_property_set(DeviceState *dev, Visitor *v, const char *name,
495 Error **errp);
496
497 /**
498 * @qdev_property_get_type - returns the type of a property
499 *
500 * @dev - the device
501 *
502 * @name - the name of the property
503 *
504 * @errp - returns an error if this function fails
505 *
506 * Returns:
507 * The type name of the property.
508 */
509 const char *qdev_property_get_type(DeviceState *dev, const char *name,
510 Error **errp);
511
512 /**
513 * @qdev_property_add_static - add a @Property to a device referencing a
514 * field in a struct.
515 */
516 void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp);
517
518 /**
519 * @qdev_get_root - returns the root device of the composition tree
520 *
521 * Returns:
522 * The root of the composition tree.
523 */
524 DeviceState *qdev_get_root(void);
525
526 /**
527 * @qdev_get_canonical_path - returns the canonical path for a device. This
528 * is the path within the composition tree starting from the root.
529 *
530 * Returns:
531 * The canonical path in the composition tree.
532 */
533 gchar *qdev_get_canonical_path(DeviceState *dev);
534
535 /**
536 * @qdev_resolve_path - resolves a path returning a device
537 *
538 * There are two types of supported paths--absolute paths and partial paths.
539 *
540 * Absolute paths are derived from the root device and can follow child<> or
541 * link<> properties. Since they can follow link<> properties, they can be
542 * arbitrarily long. Absolute paths look like absolute filenames and are
543 * prefixed with a leading slash.
544 *
545 * Partial paths look like relative filenames. They do not begin with a
546 * prefix. The matching rules for partial paths are subtle but designed to make
547 * specifying devices easy. At each level of the composition tree, the partial
548 * path is matched as an absolute path. The first match is not returned. At
549 * least two matches are searched for. A successful result is only returned if
550 * only one match is founded. If more than one match is found, a flag is
551 * return to indicate that the match was ambiguous.
552 *
553 * @path - the path to resolve
554 *
555 * @ambiguous - returns true if the path resolution failed because of an
556 * ambiguous match
557 *
558 * Returns:
559 * The matched device or NULL on path lookup failure.
560 */
561 DeviceState *qdev_resolve_path(const char *path, bool *ambiguous);
562
563 /**
564 * @qdev_property_add_child - Add a child property to a device
565 *
566 * Child properties form the composition tree. All devices need to be a child
567 * of another device. Devices can only be a child of one device.
568 *
569 * There is no way for a child to determine what its parent is. It is not
570 * a bidirectional relationship. This is by design.
571 *
572 * @dev - the device to add a property to
573 *
574 * @name - the name of the property
575 *
576 * @child - the child device
577 *
578 * @errp - if an error occurs, a pointer to an area to store the area
579 */
580 void qdev_property_add_child(DeviceState *dev, const char *name,
581 DeviceState *child, Error **errp);
582
583 /**
584 * @qdev_property_add_link - Add a link property to a device
585 *
586 * Links establish relationships between devices. Links are unidirectional
587 * although two links can be combined to form a bidirectional relationship
588 * between devices.
589 *
590 * Links form the graph in the device model.
591 *
592 * @dev - the device to add a property to
593 *
594 * @name - the name of the property
595 *
596 * @type - the qdev type of the link
597 *
598 * @child - a pointer to where the link device reference is stored
599 *
600 * @errp - if an error occurs, a pointer to an area to store the area
601 */
602 void qdev_property_add_link(DeviceState *dev, const char *name,
603 const char *type, DeviceState **child,
604 Error **errp);
605
606 /**
607 * @qdev_property_add_str
608 *
609 * Add a string property using getters/setters. This function will add a
610 * property of type 'string'.
611 *
612 * @dev - the device to add a property to
613 *
614 * @name - the name of the property
615 *
616 * @get - the getter or NULL if the property is write-only. This function must
617 * return a string to be freed by @g_free().
618 *
619 * @set - the setter or NULL if the property is read-only
620 *
621 * @errp - if an error occurs, a pointer to an area to store the error
622 */
623 void qdev_property_add_str(DeviceState *dev, const char *name,
624 char *(*get)(DeviceState *, Error **),
625 void (*set)(DeviceState *, const char *, Error **),
626 Error **errp);
627
628 /**
629 * @qdev_get_type
630 *
631 * Returns the string representation of the type of this object.
632 *
633 * @dev - the device
634 *
635 * @errp - if an error occurs, a pointer to an area to store the error
636 *
637 * Returns: a string representing the type. This must be freed by the caller
638 * with g_free().
639 */
640 char *qdev_get_type(DeviceState *dev, Error **errp);
641
642 /**
643 * @qdev_machine_init
644 *
645 * Initialize platform devices before machine init. This is a hack until full
646 * support for composition is added.
647 */
648 void qdev_machine_init(void);
649
650 #endif