Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20211016' into staging
[qemu.git] / net / can / can_host.c
1 /*
2 * CAN generic CAN host connection support
3 *
4 * Copyright (c) 2013-2014 Jin Yang
5 * Copyright (c) 2014-2018 Pavel Pisa
6 *
7 * Initial development supported by Google GSoC 2013 from RTEMS project slot
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27
28 #include "qemu/osdep.h"
29 #include "chardev/char.h"
30 #include "qemu/module.h"
31 #include "qemu/sockets.h"
32 #include "qapi/error.h"
33 #include "qom/object_interfaces.h"
34 #include "net/can_emu.h"
35 #include "net/can_host.h"
36
37 struct CanBusState {
38 Object object;
39
40 QTAILQ_HEAD(, CanBusClientState) clients;
41 };
42
43 static void can_host_disconnect(CanHostState *ch)
44 {
45 CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
46
47 can_bus_remove_client(&ch->bus_client);
48 chc->disconnect(ch);
49 }
50
51 static void can_host_connect(CanHostState *ch, Error **errp)
52 {
53 CanHostClass *chc = CAN_HOST_GET_CLASS(ch);
54 Error *local_err = NULL;
55
56 if (ch->bus == NULL) {
57 error_setg(errp, "'canbus' property not set");
58 return;
59 }
60
61 chc->connect(ch, &local_err);
62 if (local_err) {
63 error_propagate(errp, local_err);
64 return;
65 }
66
67 can_bus_insert_client(ch->bus, &ch->bus_client);
68 }
69
70 static void can_host_unparent(Object *obj)
71 {
72 can_host_disconnect(CAN_HOST(obj));
73 }
74
75 static void can_host_complete(UserCreatable *uc, Error **errp)
76 {
77 can_host_connect(CAN_HOST(uc), errp);
78 }
79
80 static void can_host_class_init(ObjectClass *klass,
81 void *class_data G_GNUC_UNUSED)
82 {
83 UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
84
85 object_class_property_add_link(klass, "canbus", TYPE_CAN_BUS,
86 offsetof(CanHostState, bus),
87 object_property_allow_set_link,
88 OBJ_PROP_LINK_STRONG);
89
90 klass->unparent = can_host_unparent;
91 uc_klass->complete = can_host_complete;
92 }
93
94 static const TypeInfo can_host_info = {
95 .parent = TYPE_OBJECT,
96 .name = TYPE_CAN_HOST,
97 .instance_size = sizeof(CanHostState),
98 .class_size = sizeof(CanHostClass),
99 .abstract = true,
100 .class_init = can_host_class_init,
101 .interfaces = (InterfaceInfo[]) {
102 { TYPE_USER_CREATABLE },
103 { }
104 }
105 };
106
107 static void can_host_register_types(void)
108 {
109 type_register_static(&can_host_info);
110 }
111
112 type_init(can_host_register_types);