|  | /* | 
|  | * 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/osdep.h" | 
|  | #include "qapi/error.h" | 
|  | #include "qemu/iov.h" | 
|  | #include "qemu/module.h" | 
|  | #include "trace.h" | 
|  |  | 
|  | #include "hw/virtio/virtio.h" | 
|  | #include "hw/qdev-properties.h" | 
|  | #include "hw/virtio/virtio-input.h" | 
|  |  | 
|  | #include "standard-headers/linux/input.h" | 
|  |  | 
|  | #define VIRTIO_INPUT_VM_VERSION 1 | 
|  |  | 
|  | /* ----------------------------------------------------------------- */ | 
|  |  | 
|  | void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event) | 
|  | { | 
|  | VirtQueueElement *elem; | 
|  | int i, len; | 
|  |  | 
|  | if (!vinput->active) { | 
|  | return; | 
|  | } | 
|  |  | 
|  | /* queue up events ... */ | 
|  | if (vinput->qindex == vinput->qsize) { | 
|  | vinput->qsize++; | 
|  | vinput->queue = g_realloc(vinput->queue, vinput->qsize * | 
|  | sizeof(vinput->queue[0])); | 
|  | } | 
|  | vinput->queue[vinput->qindex++].event = *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 ... */ | 
|  | for (i = 0; i < vinput->qindex; i++) { | 
|  | elem = virtqueue_pop(vinput->evt, sizeof(VirtQueueElement)); | 
|  | if (!elem) { | 
|  | while (--i >= 0) { | 
|  | virtqueue_unpop(vinput->evt, vinput->queue[i].elem, 0); | 
|  | } | 
|  | vinput->qindex = 0; | 
|  | trace_virtio_input_queue_full(); | 
|  | return; | 
|  | } | 
|  | vinput->queue[i].elem = elem; | 
|  | } | 
|  |  | 
|  | /* ... and finally pass them to the guest */ | 
|  | for (i = 0; i < vinput->qindex; i++) { | 
|  | elem = vinput->queue[i].elem; | 
|  | len = iov_from_buf(elem->in_sg, elem->in_num, | 
|  | 0, &vinput->queue[i].event, sizeof(virtio_input_event)); | 
|  | virtqueue_push(vinput->evt, elem, len); | 
|  | g_free(elem); | 
|  | } | 
|  | 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; | 
|  |  | 
|  | for (;;) { | 
|  | elem = virtqueue_pop(vinput->sts, sizeof(VirtQueueElement)); | 
|  | if (!elem) { | 
|  | break; | 
|  | } | 
|  |  | 
|  | 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); | 
|  | g_free(elem); | 
|  | } | 
|  | virtio_notify(vdev, vinput->sts); | 
|  | } | 
|  |  | 
|  | 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, | 
|  | Error **errp) | 
|  | { | 
|  | 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 int virtio_input_post_load(void *opaque, int version_id) | 
|  | { | 
|  | VirtIOInput *vinput = opaque; | 
|  | VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vinput); | 
|  | VirtIODevice *vdev = VIRTIO_DEVICE(vinput); | 
|  |  | 
|  | vinput->active = vdev->status & VIRTIO_CONFIG_S_DRIVER_OK; | 
|  | if (vic->change_active) { | 
|  | vic->change_active(vinput); | 
|  | } | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | 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->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_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_finalize(Object *obj) | 
|  | { | 
|  | VirtIOInput *vinput = VIRTIO_INPUT(obj); | 
|  | VirtIOInputConfig *cfg, *next; | 
|  |  | 
|  | QTAILQ_FOREACH_SAFE(cfg, &vinput->cfg_list, node, next) { | 
|  | QTAILQ_REMOVE(&vinput->cfg_list, cfg, node); | 
|  | g_free(cfg); | 
|  | } | 
|  |  | 
|  | g_free(vinput->queue); | 
|  | } | 
|  |  | 
|  | static void virtio_input_device_unrealize(DeviceState *dev) | 
|  | { | 
|  | VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev); | 
|  | VirtIODevice *vdev = VIRTIO_DEVICE(dev); | 
|  | VirtIOInput *vinput = VIRTIO_INPUT(dev); | 
|  |  | 
|  | if (vic->unrealize) { | 
|  | vic->unrealize(dev); | 
|  | } | 
|  | virtio_delete_queue(vinput->evt); | 
|  | virtio_delete_queue(vinput->sts); | 
|  | virtio_cleanup(vdev); | 
|  | } | 
|  |  | 
|  | static const VMStateDescription vmstate_virtio_input = { | 
|  | .name = "virtio-input", | 
|  | .minimum_version_id = VIRTIO_INPUT_VM_VERSION, | 
|  | .version_id = VIRTIO_INPUT_VM_VERSION, | 
|  | .fields = (const VMStateField[]) { | 
|  | VMSTATE_VIRTIO_DEVICE, | 
|  | VMSTATE_END_OF_LIST() | 
|  | }, | 
|  | .post_load = virtio_input_post_load, | 
|  | }; | 
|  |  | 
|  | static const Property virtio_input_properties[] = { | 
|  | DEFINE_PROP_STRING("serial", VirtIOInput, serial), | 
|  | }; | 
|  |  | 
|  | static void virtio_input_class_init(ObjectClass *klass, void *data) | 
|  | { | 
|  | DeviceClass *dc = DEVICE_CLASS(klass); | 
|  | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | 
|  |  | 
|  | device_class_set_props(dc, virtio_input_properties); | 
|  | dc->vmsd           = &vmstate_virtio_input; | 
|  | 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, | 
|  | .instance_finalize = virtio_input_finalize, | 
|  | }; | 
|  |  | 
|  | /* ----------------------------------------------------------------- */ | 
|  |  | 
|  | static void virtio_register_types(void) | 
|  | { | 
|  | type_register_static(&virtio_input_info); | 
|  | } | 
|  |  | 
|  | type_init(virtio_register_types) |