| /* |
| * This work is licensed under the terms of the GNU GPL, version 2 or |
| * (at your option) any later version. See the COPYING file in the |
| * top-level directory. |
| */ |
| |
| #include "qemu/iov.h" |
| |
| #include "hw/qdev.h" |
| #include "hw/virtio/virtio.h" |
| #include "hw/virtio/virtio-input.h" |
| |
| #include "standard-headers/linux/input.h" |
| |
| /* ----------------------------------------------------------------- */ |
| |
| void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event) |
| { |
| VirtQueueElement elem; |
| unsigned have, need; |
| int i, len; |
| |
| /* queue up events ... */ |
| if (vinput->qindex == vinput->qsize) { |
| vinput->qsize++; |
| vinput->queue = realloc(vinput->queue, vinput->qsize * |
| sizeof(virtio_input_event)); |
| } |
| vinput->queue[vinput->qindex++] = *event; |
| |
| /* ... until we see a report sync ... */ |
| if (event->type != cpu_to_le16(EV_SYN) || |
| event->code != cpu_to_le16(SYN_REPORT)) { |
| return; |
| } |
| |
| /* ... then check available space ... */ |
| need = sizeof(virtio_input_event) * vinput->qindex; |
| virtqueue_get_avail_bytes(vinput->evt, &have, NULL, need, 0); |
| if (have < need) { |
| vinput->qindex = 0; |
| fprintf(stderr, "%s: ENOSPC in vq, dropping events\n", __func__); |
| return; |
| } |
| |
| /* ... and finally pass them to the guest */ |
| for (i = 0; i < vinput->qindex; i++) { |
| if (!virtqueue_pop(vinput->evt, &elem)) { |
| /* should not happen, we've checked for space beforehand */ |
| fprintf(stderr, "%s: Huh? No vq elem available ...\n", __func__); |
| return; |
| } |
| len = iov_from_buf(elem.in_sg, elem.in_num, |
| 0, vinput->queue+i, sizeof(virtio_input_event)); |
| virtqueue_push(vinput->evt, &elem, len); |
| } |
| virtio_notify(VIRTIO_DEVICE(vinput), vinput->evt); |
| vinput->qindex = 0; |
| } |
| |
| static void virtio_input_handle_evt(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| /* nothing */ |
| } |
| |
| static void virtio_input_handle_sts(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev); |
| VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
| virtio_input_event event; |
| VirtQueueElement elem; |
| int len; |
| |
| while (virtqueue_pop(vinput->sts, &elem)) { |
| memset(&event, 0, sizeof(event)); |
| len = iov_to_buf(elem.out_sg, elem.out_num, |
| 0, &event, sizeof(event)); |
| if (vic->handle_status) { |
| vic->handle_status(vinput, &event); |
| } |
| virtqueue_push(vinput->sts, &elem, len); |
| } |
| virtio_notify(vdev, vinput->sts); |
| } |
| |
| static virtio_input_config *virtio_input_find_config(VirtIOInput *vinput, |
| uint8_t select, |
| uint8_t subsel) |
| { |
| VirtIOInputConfig *cfg; |
| |
| QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) { |
| if (select == cfg->config.select && |
| subsel == cfg->config.subsel) { |
| return &cfg->config; |
| } |
| } |
| return NULL; |
| } |
| |
| void virtio_input_add_config(VirtIOInput *vinput, |
| virtio_input_config *config) |
| { |
| VirtIOInputConfig *cfg; |
| |
| if (virtio_input_find_config(vinput, config->select, config->subsel)) { |
| /* should not happen */ |
| fprintf(stderr, "%s: duplicate config: %d/%d\n", |
| __func__, config->select, config->subsel); |
| abort(); |
| } |
| |
| cfg = g_new0(VirtIOInputConfig, 1); |
| cfg->config = *config; |
| QTAILQ_INSERT_TAIL(&vinput->cfg_list, cfg, node); |
| } |
| |
| void virtio_input_init_config(VirtIOInput *vinput, |
| virtio_input_config *config) |
| { |
| int i = 0; |
| |
| QTAILQ_INIT(&vinput->cfg_list); |
| while (config[i].select) { |
| virtio_input_add_config(vinput, config + i); |
| i++; |
| } |
| } |
| |
| void virtio_input_idstr_config(VirtIOInput *vinput, |
| uint8_t select, const char *string) |
| { |
| virtio_input_config id; |
| |
| if (!string) { |
| return; |
| } |
| memset(&id, 0, sizeof(id)); |
| id.select = select; |
| id.size = snprintf(id.u.string, sizeof(id.u.string), "%s", string); |
| virtio_input_add_config(vinput, &id); |
| } |
| |
| static void virtio_input_get_config(VirtIODevice *vdev, uint8_t *config_data) |
| { |
| VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
| virtio_input_config *config; |
| |
| config = virtio_input_find_config(vinput, vinput->cfg_select, |
| vinput->cfg_subsel); |
| if (config) { |
| memcpy(config_data, config, vinput->cfg_size); |
| } else { |
| memset(config_data, 0, vinput->cfg_size); |
| } |
| } |
| |
| static void virtio_input_set_config(VirtIODevice *vdev, |
| const uint8_t *config_data) |
| { |
| VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
| virtio_input_config *config = (virtio_input_config *)config_data; |
| |
| vinput->cfg_select = config->select; |
| vinput->cfg_subsel = config->subsel; |
| virtio_notify_config(vdev); |
| } |
| |
| static uint64_t virtio_input_get_features(VirtIODevice *vdev, uint64_t f) |
| { |
| return f; |
| } |
| |
| static void virtio_input_set_status(VirtIODevice *vdev, uint8_t val) |
| { |
| VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev); |
| VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
| |
| if (val & VIRTIO_CONFIG_S_DRIVER_OK) { |
| if (!vinput->active) { |
| vinput->active = true; |
| if (vic->change_active) { |
| vic->change_active(vinput); |
| } |
| } |
| } |
| } |
| |
| static void virtio_input_reset(VirtIODevice *vdev) |
| { |
| VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev); |
| VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
| |
| if (vinput->active) { |
| vinput->active = false; |
| if (vic->change_active) { |
| vic->change_active(vinput); |
| } |
| } |
| } |
| |
| static void virtio_input_device_realize(DeviceState *dev, Error **errp) |
| { |
| VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev); |
| VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| VirtIOInput *vinput = VIRTIO_INPUT(dev); |
| VirtIOInputConfig *cfg; |
| Error *local_err = NULL; |
| |
| if (vic->realize) { |
| vic->realize(dev, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| |
| virtio_input_idstr_config(vinput, VIRTIO_INPUT_CFG_ID_SERIAL, |
| vinput->input.serial); |
| |
| QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) { |
| if (vinput->cfg_size < cfg->config.size) { |
| vinput->cfg_size = cfg->config.size; |
| } |
| } |
| vinput->cfg_size += 8; |
| assert(vinput->cfg_size <= sizeof(virtio_input_config)); |
| |
| virtio_init(vdev, "virtio-input", VIRTIO_ID_INPUT, |
| vinput->cfg_size); |
| vinput->evt = virtio_add_queue(vdev, 64, virtio_input_handle_evt); |
| vinput->sts = virtio_add_queue(vdev, 64, virtio_input_handle_sts); |
| } |
| |
| static void virtio_input_device_unrealize(DeviceState *dev, Error **errp) |
| { |
| VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev); |
| VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| Error *local_err = NULL; |
| |
| if (vic->unrealize) { |
| vic->unrealize(dev, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return; |
| } |
| } |
| virtio_cleanup(vdev); |
| } |
| |
| static void virtio_input_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| |
| set_bit(DEVICE_CATEGORY_INPUT, dc->categories); |
| vdc->realize = virtio_input_device_realize; |
| vdc->unrealize = virtio_input_device_unrealize; |
| vdc->get_config = virtio_input_get_config; |
| vdc->set_config = virtio_input_set_config; |
| vdc->get_features = virtio_input_get_features; |
| vdc->set_status = virtio_input_set_status; |
| vdc->reset = virtio_input_reset; |
| } |
| |
| static const TypeInfo virtio_input_info = { |
| .name = TYPE_VIRTIO_INPUT, |
| .parent = TYPE_VIRTIO_DEVICE, |
| .instance_size = sizeof(VirtIOInput), |
| .class_size = sizeof(VirtIOInputClass), |
| .class_init = virtio_input_class_init, |
| .abstract = true, |
| }; |
| |
| /* ----------------------------------------------------------------- */ |
| |
| static void virtio_register_types(void) |
| { |
| type_register_static(&virtio_input_info); |
| } |
| |
| type_init(virtio_register_types) |
