target/arm: Implement VFP fp16 for VABS, VNEG, VSQRT
[qemu.git] / net / can / can_core.c
1 /*
2 * CAN common CAN bus emulation 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 "net/can_emu.h"
34 #include "qom/object_interfaces.h"
35
36 struct CanBusState {
37 Object object;
38
39 QTAILQ_HEAD(, CanBusClientState) clients;
40 };
41
42 static void can_bus_instance_init(Object *object)
43 {
44 CanBusState *bus = (CanBusState *)object;
45
46 QTAILQ_INIT(&bus->clients);
47 }
48
49 int can_bus_insert_client(CanBusState *bus, CanBusClientState *client)
50 {
51 client->bus = bus;
52 QTAILQ_INSERT_TAIL(&bus->clients, client, next);
53 return 0;
54 }
55
56 int can_bus_remove_client(CanBusClientState *client)
57 {
58 CanBusState *bus = client->bus;
59 if (bus == NULL) {
60 return 0;
61 }
62
63 QTAILQ_REMOVE(&bus->clients, client, next);
64 client->bus = NULL;
65 return 1;
66 }
67
68 ssize_t can_bus_client_send(CanBusClientState *client,
69 const struct qemu_can_frame *frames, size_t frames_cnt)
70 {
71 int ret = 0;
72 CanBusState *bus = client->bus;
73 CanBusClientState *peer;
74 if (bus == NULL) {
75 return -1;
76 }
77
78 QTAILQ_FOREACH(peer, &bus->clients, next) {
79 if (peer->info->can_receive(peer)) {
80 if (peer == client) {
81 /* No loopback support for now */
82 continue;
83 }
84 if (peer->info->receive(peer, frames, frames_cnt) > 0) {
85 ret = 1;
86 }
87 }
88 }
89
90 return ret;
91 }
92
93 int can_bus_filter_match(struct qemu_can_filter *filter, qemu_canid_t can_id)
94 {
95 int m;
96 if (((can_id | filter->can_mask) & QEMU_CAN_ERR_FLAG)) {
97 return (filter->can_mask & QEMU_CAN_ERR_FLAG) != 0;
98 }
99 m = (can_id & filter->can_mask) == (filter->can_id & filter->can_mask);
100 return filter->can_id & QEMU_CAN_INV_FILTER ? !m : m;
101 }
102
103 int can_bus_client_set_filters(CanBusClientState *client,
104 const struct qemu_can_filter *filters, size_t filters_cnt)
105 {
106 return 0;
107 }
108
109
110 static bool can_bus_can_be_deleted(UserCreatable *uc)
111 {
112 return false;
113 }
114
115 static void can_bus_class_init(ObjectClass *klass,
116 void *class_data G_GNUC_UNUSED)
117 {
118 UserCreatableClass *uc_klass = USER_CREATABLE_CLASS(klass);
119
120 uc_klass->can_be_deleted = can_bus_can_be_deleted;
121 }
122
123 static const TypeInfo can_bus_info = {
124 .parent = TYPE_OBJECT,
125 .name = TYPE_CAN_BUS,
126 .instance_size = sizeof(CanBusState),
127 .instance_init = can_bus_instance_init,
128 .class_init = can_bus_class_init,
129 .interfaces = (InterfaceInfo[]) {
130 { TYPE_USER_CREATABLE },
131 { }
132 }
133 };
134
135 static void can_bus_register_types(void)
136 {
137 type_register_static(&can_bus_info);
138 }
139
140 type_init(can_bus_register_types);