1a62c8911SAndreas Färber /*
2a62c8911SAndreas Färber * Dynamic device configuration and creation -- buses.
3a62c8911SAndreas Färber *
4a62c8911SAndreas Färber * Copyright (c) 2009 CodeSourcery
5a62c8911SAndreas Färber *
6a62c8911SAndreas Färber * This library is free software; you can redistribute it and/or
7a62c8911SAndreas Färber * modify it under the terms of the GNU Lesser General Public
8a62c8911SAndreas Färber * License as published by the Free Software Foundation; either
961f3c91aSChetan Pant * version 2.1 of the License, or (at your option) any later version.
10a62c8911SAndreas Färber *
11a62c8911SAndreas Färber * This library is distributed in the hope that it will be useful,
12a62c8911SAndreas Färber * but WITHOUT ANY WARRANTY; without even the implied warranty of
13a62c8911SAndreas Färber * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14a62c8911SAndreas Färber * Lesser General Public License for more details.
15a62c8911SAndreas Färber *
16a62c8911SAndreas Färber * You should have received a copy of the GNU Lesser General Public
17a62c8911SAndreas Färber * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18a62c8911SAndreas Färber */
19a62c8911SAndreas Färber
20a62c8911SAndreas Färber #include "qemu/osdep.h"
21a27bd6c7SMarkus Armbruster #include "hw/qdev-properties.h"
22856dfd8aSMarkus Armbruster #include "qemu/ctype.h"
230b8fa32fSMarkus Armbruster #include "qemu/module.h"
24a62c8911SAndreas Färber #include "qapi/error.h"
25a62c8911SAndreas Färber
qbus_set_hotplug_handler(BusState * bus,Object * handler)269bc6bfdfSMarkus Armbruster void qbus_set_hotplug_handler(BusState *bus, Object *handler)
27a62c8911SAndreas Färber {
285325cc34SMarkus Armbruster object_property_set_link(OBJECT(bus), QDEV_HOTPLUG_HANDLER_PROPERTY,
295325cc34SMarkus Armbruster handler, &error_abort);
30a62c8911SAndreas Färber }
31a62c8911SAndreas Färber
qbus_set_bus_hotplug_handler(BusState * bus)32cd7c8660SMarkus Armbruster void qbus_set_bus_hotplug_handler(BusState *bus)
33a62c8911SAndreas Färber {
349bc6bfdfSMarkus Armbruster qbus_set_hotplug_handler(bus, OBJECT(bus));
35a62c8911SAndreas Färber }
36a62c8911SAndreas Färber
qbus_walk_children(BusState * bus,qdev_walkerfn * pre_devfn,qbus_walkerfn * pre_busfn,qdev_walkerfn * post_devfn,qbus_walkerfn * post_busfn,void * opaque)37a62c8911SAndreas Färber int qbus_walk_children(BusState *bus,
38a62c8911SAndreas Färber qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
39a62c8911SAndreas Färber qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
40a62c8911SAndreas Färber void *opaque)
41a62c8911SAndreas Färber {
42a62c8911SAndreas Färber BusChild *kid;
43a62c8911SAndreas Färber int err;
44a62c8911SAndreas Färber
45a62c8911SAndreas Färber if (pre_busfn) {
46a62c8911SAndreas Färber err = pre_busfn(bus, opaque);
47a62c8911SAndreas Färber if (err) {
48a62c8911SAndreas Färber return err;
49a62c8911SAndreas Färber }
50a62c8911SAndreas Färber }
51a62c8911SAndreas Färber
522d24a646SMaxim Levitsky WITH_RCU_READ_LOCK_GUARD() {
532d24a646SMaxim Levitsky QTAILQ_FOREACH_RCU(kid, &bus->children, sibling) {
54a62c8911SAndreas Färber err = qdev_walk_children(kid->child,
55a62c8911SAndreas Färber pre_devfn, pre_busfn,
56a62c8911SAndreas Färber post_devfn, post_busfn, opaque);
57a62c8911SAndreas Färber if (err < 0) {
58a62c8911SAndreas Färber return err;
59a62c8911SAndreas Färber }
60a62c8911SAndreas Färber }
612d24a646SMaxim Levitsky }
62a62c8911SAndreas Färber
63a62c8911SAndreas Färber if (post_busfn) {
64a62c8911SAndreas Färber err = post_busfn(bus, opaque);
65a62c8911SAndreas Färber if (err) {
66a62c8911SAndreas Färber return err;
67a62c8911SAndreas Färber }
68a62c8911SAndreas Färber }
69a62c8911SAndreas Färber
70a62c8911SAndreas Färber return 0;
71a62c8911SAndreas Färber }
72a62c8911SAndreas Färber
bus_cold_reset(BusState * bus)73abb89dbfSDamien Hedde void bus_cold_reset(BusState *bus)
74abb89dbfSDamien Hedde {
75abb89dbfSDamien Hedde resettable_reset(OBJECT(bus), RESET_TYPE_COLD);
76abb89dbfSDamien Hedde }
77abb89dbfSDamien Hedde
bus_is_in_reset(BusState * bus)78c11256aaSDamien Hedde bool bus_is_in_reset(BusState *bus)
79c11256aaSDamien Hedde {
80c11256aaSDamien Hedde return resettable_is_in_reset(OBJECT(bus));
81c11256aaSDamien Hedde }
82c11256aaSDamien Hedde
bus_get_reset_state(Object * obj)83c11256aaSDamien Hedde static ResettableState *bus_get_reset_state(Object *obj)
84c11256aaSDamien Hedde {
85c11256aaSDamien Hedde BusState *bus = BUS(obj);
86c11256aaSDamien Hedde return &bus->reset;
87c11256aaSDamien Hedde }
88c11256aaSDamien Hedde
bus_reset_child_foreach(Object * obj,ResettableChildCallback cb,void * opaque,ResetType type)89c11256aaSDamien Hedde static void bus_reset_child_foreach(Object *obj, ResettableChildCallback cb,
90c11256aaSDamien Hedde void *opaque, ResetType type)
91c11256aaSDamien Hedde {
92c11256aaSDamien Hedde BusState *bus = BUS(obj);
93c11256aaSDamien Hedde BusChild *kid;
94c11256aaSDamien Hedde
952d24a646SMaxim Levitsky WITH_RCU_READ_LOCK_GUARD() {
962d24a646SMaxim Levitsky QTAILQ_FOREACH_RCU(kid, &bus->children, sibling) {
97c11256aaSDamien Hedde cb(OBJECT(kid->child), opaque, type);
98c11256aaSDamien Hedde }
99c11256aaSDamien Hedde }
1002d24a646SMaxim Levitsky }
101c11256aaSDamien Hedde
qbus_init_internal(BusState * bus,DeviceState * parent,const char * name)102d637e1dcSPeter Maydell static void qbus_init_internal(BusState *bus, DeviceState *parent,
103d637e1dcSPeter Maydell const char *name)
104a62c8911SAndreas Färber {
105a62c8911SAndreas Färber const char *typename = object_get_typename(OBJECT(bus));
106a62c8911SAndreas Färber BusClass *bc;
107f73480c3SMarc-André Lureau int i, bus_id;
108a62c8911SAndreas Färber
109a62c8911SAndreas Färber bus->parent = parent;
110a62c8911SAndreas Färber
111a62c8911SAndreas Färber if (name) {
112a62c8911SAndreas Färber bus->name = g_strdup(name);
113a62c8911SAndreas Färber } else if (bus->parent && bus->parent->id) {
114a62c8911SAndreas Färber /* parent device has id -> use it plus parent-bus-id for bus name */
115a62c8911SAndreas Färber bus_id = bus->parent->num_child_bus;
116f73480c3SMarc-André Lureau bus->name = g_strdup_printf("%s.%d", bus->parent->id, bus_id);
117a62c8911SAndreas Färber } else {
118a62c8911SAndreas Färber /* no id -> use lowercase bus type plus global bus-id for bus name */
119a62c8911SAndreas Färber bc = BUS_GET_CLASS(bus);
120a62c8911SAndreas Färber bus_id = bc->automatic_ids++;
121f73480c3SMarc-André Lureau bus->name = g_strdup_printf("%s.%d", typename, bus_id);
122f73480c3SMarc-André Lureau for (i = 0; bus->name[i]; i++) {
123f73480c3SMarc-André Lureau bus->name[i] = qemu_tolower(bus->name[i]);
124a62c8911SAndreas Färber }
125a62c8911SAndreas Färber }
126a62c8911SAndreas Färber
127a62c8911SAndreas Färber if (bus->parent) {
128a62c8911SAndreas Färber QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
129a62c8911SAndreas Färber bus->parent->num_child_bus++;
130d2623129SMarkus Armbruster object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus));
1310d1e8d6fSMarc-André Lureau object_unref(OBJECT(bus));
132be1ba4d5SPeter Maydell } else {
133be1ba4d5SPeter Maydell /* The only bus without a parent is the main system bus */
134be1ba4d5SPeter Maydell assert(bus == sysbus_get_default());
135a62c8911SAndreas Färber }
136a62c8911SAndreas Färber }
137a62c8911SAndreas Färber
bus_unparent(Object * obj)138a62c8911SAndreas Färber static void bus_unparent(Object *obj)
139a62c8911SAndreas Färber {
140a62c8911SAndreas Färber BusState *bus = BUS(obj);
141a62c8911SAndreas Färber BusChild *kid;
142a62c8911SAndreas Färber
143be1ba4d5SPeter Maydell /* Only the main system bus has no parent, and that bus is never freed */
144be1ba4d5SPeter Maydell assert(bus->parent);
145be1ba4d5SPeter Maydell
146a62c8911SAndreas Färber while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
147a62c8911SAndreas Färber DeviceState *dev = kid->child;
148a62c8911SAndreas Färber object_unparent(OBJECT(dev));
149a62c8911SAndreas Färber }
150a62c8911SAndreas Färber QLIST_REMOVE(bus, sibling);
151a62c8911SAndreas Färber bus->parent->num_child_bus--;
152a62c8911SAndreas Färber bus->parent = NULL;
153a62c8911SAndreas Färber }
154a62c8911SAndreas Färber
qbus_init(void * bus,size_t size,const char * typename,DeviceState * parent,const char * name)155d637e1dcSPeter Maydell void qbus_init(void *bus, size_t size, const char *typename,
156a62c8911SAndreas Färber DeviceState *parent, const char *name)
157a62c8911SAndreas Färber {
158a62c8911SAndreas Färber object_initialize(bus, size, typename);
159d637e1dcSPeter Maydell qbus_init_internal(bus, parent, name);
160a62c8911SAndreas Färber }
161a62c8911SAndreas Färber
qbus_new(const char * typename,DeviceState * parent,const char * name)162*9388d170SPeter Maydell BusState *qbus_new(const char *typename, DeviceState *parent, const char *name)
163a62c8911SAndreas Färber {
164a62c8911SAndreas Färber BusState *bus;
165a62c8911SAndreas Färber
166a62c8911SAndreas Färber bus = BUS(object_new(typename));
167d637e1dcSPeter Maydell qbus_init_internal(bus, parent, name);
168a62c8911SAndreas Färber
169a62c8911SAndreas Färber return bus;
170a62c8911SAndreas Färber }
171a62c8911SAndreas Färber
qbus_realize(BusState * bus,Error ** errp)1729940b2cfSMarkus Armbruster bool qbus_realize(BusState *bus, Error **errp)
1739940b2cfSMarkus Armbruster {
174f07ad48dSMarkus Armbruster return object_property_set_bool(OBJECT(bus), "realized", true, errp);
1759940b2cfSMarkus Armbruster }
1769940b2cfSMarkus Armbruster
qbus_unrealize(BusState * bus)1779940b2cfSMarkus Armbruster void qbus_unrealize(BusState *bus)
1789940b2cfSMarkus Armbruster {
1795325cc34SMarkus Armbruster object_property_set_bool(OBJECT(bus), "realized", false, &error_abort);
1809940b2cfSMarkus Armbruster }
1819940b2cfSMarkus Armbruster
bus_get_realized(Object * obj,Error ** errp)182a62c8911SAndreas Färber static bool bus_get_realized(Object *obj, Error **errp)
183a62c8911SAndreas Färber {
184a62c8911SAndreas Färber BusState *bus = BUS(obj);
185a62c8911SAndreas Färber
186a62c8911SAndreas Färber return bus->realized;
187a62c8911SAndreas Färber }
188a62c8911SAndreas Färber
bus_set_realized(Object * obj,bool value,Error ** errp)189a62c8911SAndreas Färber static void bus_set_realized(Object *obj, bool value, Error **errp)
190a62c8911SAndreas Färber {
191a62c8911SAndreas Färber BusState *bus = BUS(obj);
192a62c8911SAndreas Färber BusClass *bc = BUS_GET_CLASS(bus);
193a62c8911SAndreas Färber BusChild *kid;
194a62c8911SAndreas Färber
195a62c8911SAndreas Färber if (value && !bus->realized) {
196a62c8911SAndreas Färber if (bc->realize) {
197b69c3c21SMarkus Armbruster bc->realize(bus, errp);
198a62c8911SAndreas Färber }
199a62c8911SAndreas Färber
200a62c8911SAndreas Färber /* TODO: recursive realization */
201a62c8911SAndreas Färber } else if (!value && bus->realized) {
2022d24a646SMaxim Levitsky WITH_RCU_READ_LOCK_GUARD() {
2032d24a646SMaxim Levitsky QTAILQ_FOREACH_RCU(kid, &bus->children, sibling) {
204a62c8911SAndreas Färber DeviceState *dev = kid->child;
205981c3dcdSMarkus Armbruster qdev_unrealize(dev);
206a62c8911SAndreas Färber }
2072d24a646SMaxim Levitsky }
208b69c3c21SMarkus Armbruster if (bc->unrealize) {
209b69c3c21SMarkus Armbruster bc->unrealize(bus);
210a62c8911SAndreas Färber }
211a62c8911SAndreas Färber }
212a62c8911SAndreas Färber
213a62c8911SAndreas Färber bus->realized = value;
214a62c8911SAndreas Färber }
215a62c8911SAndreas Färber
qbus_initfn(Object * obj)216a62c8911SAndreas Färber static void qbus_initfn(Object *obj)
217a62c8911SAndreas Färber {
218a62c8911SAndreas Färber BusState *bus = BUS(obj);
219a62c8911SAndreas Färber
220a62c8911SAndreas Färber QTAILQ_INIT(&bus->children);
221a62c8911SAndreas Färber object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
222a62c8911SAndreas Färber TYPE_HOTPLUG_HANDLER,
223a62c8911SAndreas Färber (Object **)&bus->hotplug_handler,
224a62c8911SAndreas Färber object_property_allow_set_link,
225d2623129SMarkus Armbruster 0);
226a62c8911SAndreas Färber object_property_add_bool(obj, "realized",
227d2623129SMarkus Armbruster bus_get_realized, bus_set_realized);
228a62c8911SAndreas Färber }
229a62c8911SAndreas Färber
default_bus_get_fw_dev_path(DeviceState * dev)230a62c8911SAndreas Färber static char *default_bus_get_fw_dev_path(DeviceState *dev)
231a62c8911SAndreas Färber {
232a62c8911SAndreas Färber return g_strdup(object_get_typename(OBJECT(dev)));
233a62c8911SAndreas Färber }
234a62c8911SAndreas Färber
bus_class_init(ObjectClass * class,void * data)235a62c8911SAndreas Färber static void bus_class_init(ObjectClass *class, void *data)
236a62c8911SAndreas Färber {
237a62c8911SAndreas Färber BusClass *bc = BUS_CLASS(class);
238c11256aaSDamien Hedde ResettableClass *rc = RESETTABLE_CLASS(class);
239a62c8911SAndreas Färber
240a62c8911SAndreas Färber class->unparent = bus_unparent;
241a62c8911SAndreas Färber bc->get_fw_dev_path = default_bus_get_fw_dev_path;
242c11256aaSDamien Hedde
243c11256aaSDamien Hedde rc->get_state = bus_get_reset_state;
244c11256aaSDamien Hedde rc->child_foreach = bus_reset_child_foreach;
245a62c8911SAndreas Färber }
246a62c8911SAndreas Färber
qbus_finalize(Object * obj)247a62c8911SAndreas Färber static void qbus_finalize(Object *obj)
248a62c8911SAndreas Färber {
249a62c8911SAndreas Färber BusState *bus = BUS(obj);
250a62c8911SAndreas Färber
251f73480c3SMarc-André Lureau g_free(bus->name);
252a62c8911SAndreas Färber }
253a62c8911SAndreas Färber
254a62c8911SAndreas Färber static const TypeInfo bus_info = {
255a62c8911SAndreas Färber .name = TYPE_BUS,
256a62c8911SAndreas Färber .parent = TYPE_OBJECT,
257a62c8911SAndreas Färber .instance_size = sizeof(BusState),
258a62c8911SAndreas Färber .abstract = true,
259a62c8911SAndreas Färber .class_size = sizeof(BusClass),
260a62c8911SAndreas Färber .instance_init = qbus_initfn,
261a62c8911SAndreas Färber .instance_finalize = qbus_finalize,
262a62c8911SAndreas Färber .class_init = bus_class_init,
263c11256aaSDamien Hedde .interfaces = (InterfaceInfo[]) {
264c11256aaSDamien Hedde { TYPE_RESETTABLE_INTERFACE },
265c11256aaSDamien Hedde { }
266c11256aaSDamien Hedde },
267a62c8911SAndreas Färber };
268a62c8911SAndreas Färber
bus_register_types(void)269a62c8911SAndreas Färber static void bus_register_types(void)
270a62c8911SAndreas Färber {
271a62c8911SAndreas Färber type_register_static(&bus_info);
272a62c8911SAndreas Färber }
273a62c8911SAndreas Färber
274a62c8911SAndreas Färber type_init(bus_register_types)
275