b065e275a8
VIRTIO_INPUT_CFG_ABS_INFO was not implemented for pass-through input devices. This patch follows the existing design and pre-fetches the config for all absolute axes using EVIOCGABS at realize time. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Message-id: 1460558603-18331-1-git-send-email-lprosek@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
344 lines
9.6 KiB
C
344 lines
9.6 KiB
C
/*
|
|
* 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 "hw/qdev.h"
|
|
#include "hw/virtio/virtio.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;
|
|
unsigned have, need;
|
|
int i, len;
|
|
|
|
if (!vinput->active) {
|
|
return;
|
|
}
|
|
|
|
/* 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++) {
|
|
elem = virtqueue_pop(vinput->evt, sizeof(VirtQueueElement));
|
|
if (!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);
|
|
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 void virtio_input_save(QEMUFile *f, void *opaque)
|
|
{
|
|
VirtIOInput *vinput = opaque;
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(vinput);
|
|
|
|
virtio_save(vdev, f);
|
|
}
|
|
|
|
static int virtio_input_load(QEMUFile *f, void *opaque, int version_id)
|
|
{
|
|
VirtIOInput *vinput = opaque;
|
|
VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vinput);
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(vinput);
|
|
int ret;
|
|
|
|
if (version_id != VIRTIO_INPUT_VM_VERSION) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = virtio_load(vdev, f, version_id);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
/* post_load() */
|
|
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-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);
|
|
|
|
register_savevm(dev, "virtio-input", -1, VIRTIO_INPUT_VM_VERSION,
|
|
virtio_input_save, virtio_input_load, vinput);
|
|
}
|
|
|
|
static void virtio_input_device_unrealize(DeviceState *dev, Error **errp)
|
|
{
|
|
VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
|
VirtIOInput *vinput = VIRTIO_INPUT(dev);
|
|
Error *local_err = NULL;
|
|
|
|
unregister_savevm(dev, "virtio-input", vinput);
|
|
|
|
if (vic->unrealize) {
|
|
vic->unrealize(dev, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
virtio_cleanup(vdev);
|
|
}
|
|
|
|
static Property virtio_input_properties[] = {
|
|
DEFINE_PROP_STRING("serial", VirtIOInput, serial),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_input_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
|
|
|
|
dc->props = virtio_input_properties;
|
|
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)
|