plugin-gen: add module for TCG-related code
[qemu/ar7.git] / hw / input / virtio-input.c
blob51617a5885f69fe816106df5d6c7d5a6043e32aa
1 /*
2 * This work is licensed under the terms of the GNU GPL, version 2 or
3 * (at your option) any later version. See the COPYING file in the
4 * top-level directory.
5 */
7 #include "qemu/osdep.h"
8 #include "qapi/error.h"
9 #include "qemu/iov.h"
10 #include "qemu/module.h"
11 #include "trace.h"
13 #include "hw/virtio/virtio.h"
14 #include "hw/qdev-properties.h"
15 #include "hw/virtio/virtio-input.h"
17 #include "standard-headers/linux/input.h"
19 #define VIRTIO_INPUT_VM_VERSION 1
21 /* ----------------------------------------------------------------- */
23 void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event)
25 VirtQueueElement *elem;
26 int i, len;
28 if (!vinput->active) {
29 return;
32 /* queue up events ... */
33 if (vinput->qindex == vinput->qsize) {
34 vinput->qsize++;
35 vinput->queue = g_realloc(vinput->queue, vinput->qsize *
36 sizeof(vinput->queue[0]));
38 vinput->queue[vinput->qindex++].event = *event;
40 /* ... until we see a report sync ... */
41 if (event->type != cpu_to_le16(EV_SYN) ||
42 event->code != cpu_to_le16(SYN_REPORT)) {
43 return;
46 /* ... then check available space ... */
47 for (i = 0; i < vinput->qindex; i++) {
48 elem = virtqueue_pop(vinput->evt, sizeof(VirtQueueElement));
49 if (!elem) {
50 while (--i >= 0) {
51 virtqueue_unpop(vinput->evt, vinput->queue[i].elem, 0);
53 vinput->qindex = 0;
54 trace_virtio_input_queue_full();
55 return;
57 vinput->queue[i].elem = elem;
60 /* ... and finally pass them to the guest */
61 for (i = 0; i < vinput->qindex; i++) {
62 elem = vinput->queue[i].elem;
63 len = iov_from_buf(elem->in_sg, elem->in_num,
64 0, &vinput->queue[i].event, sizeof(virtio_input_event));
65 virtqueue_push(vinput->evt, elem, len);
66 g_free(elem);
68 virtio_notify(VIRTIO_DEVICE(vinput), vinput->evt);
69 vinput->qindex = 0;
72 static void virtio_input_handle_evt(VirtIODevice *vdev, VirtQueue *vq)
74 /* nothing */
77 static void virtio_input_handle_sts(VirtIODevice *vdev, VirtQueue *vq)
79 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
80 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
81 virtio_input_event event;
82 VirtQueueElement *elem;
83 int len;
85 for (;;) {
86 elem = virtqueue_pop(vinput->sts, sizeof(VirtQueueElement));
87 if (!elem) {
88 break;
91 memset(&event, 0, sizeof(event));
92 len = iov_to_buf(elem->out_sg, elem->out_num,
93 0, &event, sizeof(event));
94 if (vic->handle_status) {
95 vic->handle_status(vinput, &event);
97 virtqueue_push(vinput->sts, elem, len);
98 g_free(elem);
100 virtio_notify(vdev, vinput->sts);
103 virtio_input_config *virtio_input_find_config(VirtIOInput *vinput,
104 uint8_t select,
105 uint8_t subsel)
107 VirtIOInputConfig *cfg;
109 QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) {
110 if (select == cfg->config.select &&
111 subsel == cfg->config.subsel) {
112 return &cfg->config;
115 return NULL;
118 void virtio_input_add_config(VirtIOInput *vinput,
119 virtio_input_config *config)
121 VirtIOInputConfig *cfg;
123 if (virtio_input_find_config(vinput, config->select, config->subsel)) {
124 /* should not happen */
125 fprintf(stderr, "%s: duplicate config: %d/%d\n",
126 __func__, config->select, config->subsel);
127 abort();
130 cfg = g_new0(VirtIOInputConfig, 1);
131 cfg->config = *config;
132 QTAILQ_INSERT_TAIL(&vinput->cfg_list, cfg, node);
135 void virtio_input_init_config(VirtIOInput *vinput,
136 virtio_input_config *config)
138 int i = 0;
140 QTAILQ_INIT(&vinput->cfg_list);
141 while (config[i].select) {
142 virtio_input_add_config(vinput, config + i);
143 i++;
147 void virtio_input_idstr_config(VirtIOInput *vinput,
148 uint8_t select, const char *string)
150 virtio_input_config id;
152 if (!string) {
153 return;
155 memset(&id, 0, sizeof(id));
156 id.select = select;
157 id.size = snprintf(id.u.string, sizeof(id.u.string), "%s", string);
158 virtio_input_add_config(vinput, &id);
161 static void virtio_input_get_config(VirtIODevice *vdev, uint8_t *config_data)
163 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
164 virtio_input_config *config;
166 config = virtio_input_find_config(vinput, vinput->cfg_select,
167 vinput->cfg_subsel);
168 if (config) {
169 memcpy(config_data, config, vinput->cfg_size);
170 } else {
171 memset(config_data, 0, vinput->cfg_size);
175 static void virtio_input_set_config(VirtIODevice *vdev,
176 const uint8_t *config_data)
178 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
179 virtio_input_config *config = (virtio_input_config *)config_data;
181 vinput->cfg_select = config->select;
182 vinput->cfg_subsel = config->subsel;
183 virtio_notify_config(vdev);
186 static uint64_t virtio_input_get_features(VirtIODevice *vdev, uint64_t f,
187 Error **errp)
189 return f;
192 static void virtio_input_set_status(VirtIODevice *vdev, uint8_t val)
194 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
195 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
197 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
198 if (!vinput->active) {
199 vinput->active = true;
200 if (vic->change_active) {
201 vic->change_active(vinput);
207 static void virtio_input_reset(VirtIODevice *vdev)
209 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
210 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
212 if (vinput->active) {
213 vinput->active = false;
214 if (vic->change_active) {
215 vic->change_active(vinput);
220 static int virtio_input_post_load(void *opaque, int version_id)
222 VirtIOInput *vinput = opaque;
223 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vinput);
224 VirtIODevice *vdev = VIRTIO_DEVICE(vinput);
226 vinput->active = vdev->status & VIRTIO_CONFIG_S_DRIVER_OK;
227 if (vic->change_active) {
228 vic->change_active(vinput);
230 return 0;
233 static void virtio_input_device_realize(DeviceState *dev, Error **errp)
235 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
236 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
237 VirtIOInput *vinput = VIRTIO_INPUT(dev);
238 VirtIOInputConfig *cfg;
239 Error *local_err = NULL;
241 if (vic->realize) {
242 vic->realize(dev, &local_err);
243 if (local_err) {
244 error_propagate(errp, local_err);
245 return;
249 virtio_input_idstr_config(vinput, VIRTIO_INPUT_CFG_ID_SERIAL,
250 vinput->serial);
252 QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) {
253 if (vinput->cfg_size < cfg->config.size) {
254 vinput->cfg_size = cfg->config.size;
257 vinput->cfg_size += 8;
258 assert(vinput->cfg_size <= sizeof(virtio_input_config));
260 virtio_init(vdev, "virtio-input", VIRTIO_ID_INPUT,
261 vinput->cfg_size);
262 vinput->evt = virtio_add_queue(vdev, 64, virtio_input_handle_evt);
263 vinput->sts = virtio_add_queue(vdev, 64, virtio_input_handle_sts);
266 static void virtio_input_finalize(Object *obj)
268 VirtIOInput *vinput = VIRTIO_INPUT(obj);
269 VirtIOInputConfig *cfg, *next;
271 QTAILQ_FOREACH_SAFE(cfg, &vinput->cfg_list, node, next) {
272 QTAILQ_REMOVE(&vinput->cfg_list, cfg, node);
273 g_free(cfg);
276 g_free(vinput->queue);
278 static void virtio_input_device_unrealize(DeviceState *dev, Error **errp)
280 VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
281 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
282 Error *local_err = NULL;
284 if (vic->unrealize) {
285 vic->unrealize(dev, &local_err);
286 if (local_err) {
287 error_propagate(errp, local_err);
288 return;
291 virtio_cleanup(vdev);
294 static const VMStateDescription vmstate_virtio_input = {
295 .name = "virtio-input",
296 .minimum_version_id = VIRTIO_INPUT_VM_VERSION,
297 .version_id = VIRTIO_INPUT_VM_VERSION,
298 .fields = (VMStateField[]) {
299 VMSTATE_VIRTIO_DEVICE,
300 VMSTATE_END_OF_LIST()
302 .post_load = virtio_input_post_load,
305 static Property virtio_input_properties[] = {
306 DEFINE_PROP_STRING("serial", VirtIOInput, serial),
307 DEFINE_PROP_END_OF_LIST(),
310 static void virtio_input_class_init(ObjectClass *klass, void *data)
312 DeviceClass *dc = DEVICE_CLASS(klass);
313 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
315 dc->props = virtio_input_properties;
316 dc->vmsd = &vmstate_virtio_input;
317 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
318 vdc->realize = virtio_input_device_realize;
319 vdc->unrealize = virtio_input_device_unrealize;
320 vdc->get_config = virtio_input_get_config;
321 vdc->set_config = virtio_input_set_config;
322 vdc->get_features = virtio_input_get_features;
323 vdc->set_status = virtio_input_set_status;
324 vdc->reset = virtio_input_reset;
327 static const TypeInfo virtio_input_info = {
328 .name = TYPE_VIRTIO_INPUT,
329 .parent = TYPE_VIRTIO_DEVICE,
330 .instance_size = sizeof(VirtIOInput),
331 .class_size = sizeof(VirtIOInputClass),
332 .class_init = virtio_input_class_init,
333 .abstract = true,
334 .instance_finalize = virtio_input_finalize,
337 /* ----------------------------------------------------------------- */
339 static void virtio_register_types(void)
341 type_register_static(&virtio_input_info);
344 type_init(virtio_register_types)