1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
* Dynamic device configuration and creation -- buses.
*
* Copyright (c) 2009 CodeSourcery
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "hw/qdev.h"
#include "qapi/error.h"
static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
Error **errp)
{
object_property_set_link(OBJECT(bus), OBJECT(handler),
QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
}
void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler, Error **errp)
{
qbus_set_hotplug_handler_internal(bus, OBJECT(handler), errp);
}
void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp)
{
qbus_set_hotplug_handler_internal(bus, OBJECT(bus), errp);
}
int qbus_walk_children(BusState *bus,
qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
void *opaque)
{
BusChild *kid;
int err;
if (pre_busfn) {
err = pre_busfn(bus, opaque);
if (err) {
return err;
}
}
QTAILQ_FOREACH(kid, &bus->children, sibling) {
err = qdev_walk_children(kid->child,
pre_devfn, pre_busfn,
post_devfn, post_busfn, opaque);
if (err < 0) {
return err;
}
}
if (post_busfn) {
err = post_busfn(bus, opaque);
if (err) {
return err;
}
}
return 0;
}
static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
{
const char *typename = object_get_typename(OBJECT(bus));
BusClass *bc;
int i, bus_id;
bus->parent = parent;
if (name) {
bus->name = g_strdup(name);
} else if (bus->parent && bus->parent->id) {
/* parent device has id -> use it plus parent-bus-id for bus name */
bus_id = bus->parent->num_child_bus;
bus->name = g_strdup_printf("%s.%d", bus->parent->id, bus_id);
} else {
/* no id -> use lowercase bus type plus global bus-id for bus name */
bc = BUS_GET_CLASS(bus);
bus_id = bc->automatic_ids++;
bus->name = g_strdup_printf("%s.%d", typename, bus_id);
for (i = 0; bus->name[i]; i++) {
bus->name[i] = qemu_tolower(bus->name[i]);
}
}
if (bus->parent) {
QLIST_INSERT_HEAD(&bus->parent->child_bus, bus, sibling);
bus->parent->num_child_bus++;
object_property_add_child(OBJECT(bus->parent), bus->name, OBJECT(bus), NULL);
object_unref(OBJECT(bus));
} else if (bus != sysbus_get_default()) {
/* TODO: once all bus devices are qdevified,
only reset handler for main_system_bus should be registered here. */
qemu_register_reset(qbus_reset_all_fn, bus);
}
}
static void bus_unparent(Object *obj)
{
BusState *bus = BUS(obj);
BusChild *kid;
while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
DeviceState *dev = kid->child;
object_unparent(OBJECT(dev));
}
if (bus->parent) {
QLIST_REMOVE(bus, sibling);
bus->parent->num_child_bus--;
bus->parent = NULL;
} else {
assert(bus != sysbus_get_default()); /* main_system_bus is never freed */
qemu_unregister_reset(qbus_reset_all_fn, bus);
}
}
void qbus_create_inplace(void *bus, size_t size, const char *typename,
DeviceState *parent, const char *name)
{
object_initialize(bus, size, typename);
qbus_realize(bus, parent, name);
}
BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
{
BusState *bus;
bus = BUS(object_new(typename));
qbus_realize(bus, parent, name);
return bus;
}
static bool bus_get_realized(Object *obj, Error **errp)
{
BusState *bus = BUS(obj);
return bus->realized;
}
static void bus_set_realized(Object *obj, bool value, Error **errp)
{
BusState *bus = BUS(obj);
BusClass *bc = BUS_GET_CLASS(bus);
BusChild *kid;
Error *local_err = NULL;
if (value && !bus->realized) {
if (bc->realize) {
bc->realize(bus, &local_err);
}
/* TODO: recursive realization */
} else if (!value && bus->realized) {
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
object_property_set_bool(OBJECT(dev), false, "realized",
&local_err);
if (local_err != NULL) {
break;
}
}
if (bc->unrealize && local_err == NULL) {
bc->unrealize(bus, &local_err);
}
}
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
bus->realized = value;
}
static void qbus_initfn(Object *obj)
{
BusState *bus = BUS(obj);
QTAILQ_INIT(&bus->children);
object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY,
TYPE_HOTPLUG_HANDLER,
(Object **)&bus->hotplug_handler,
object_property_allow_set_link,
0,
NULL);
object_property_add_bool(obj, "realized",
bus_get_realized, bus_set_realized, NULL);
}
static char *default_bus_get_fw_dev_path(DeviceState *dev)
{
return g_strdup(object_get_typename(OBJECT(dev)));
}
static void bus_class_init(ObjectClass *class, void *data)
{
BusClass *bc = BUS_CLASS(class);
class->unparent = bus_unparent;
bc->get_fw_dev_path = default_bus_get_fw_dev_path;
}
static void qbus_finalize(Object *obj)
{
BusState *bus = BUS(obj);
g_free(bus->name);
}
static const TypeInfo bus_info = {
.name = TYPE_BUS,
.parent = TYPE_OBJECT,
.instance_size = sizeof(BusState),
.abstract = true,
.class_size = sizeof(BusClass),
.instance_init = qbus_initfn,
.instance_finalize = qbus_finalize,
.class_init = bus_class_init,
};
static void bus_register_types(void)
{
type_register_static(&bus_info);
}
type_init(bus_register_types)
|