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qemu/ui/input.c
Paolo Bonzini f481ee2d5e qemu/queue.h: typedef QTAILQ heads 
This will be needed when we change the QTAILQ head and elem structs
to unions.  However, it is also consistent with the usage elsewhere
in QEMU for other list head structs (see for example FsMountList).

Note that most QTAILQs only need their name in order to do backwards
walks.  Those do not break with the struct->union change, and anyway
the change will also remove the need to name heads when doing backwards
walks, so those are not touched here.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-01-11 15:46:55 +01:00

630 lines
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#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-ui.h"
#include "qapi/qmp/qdict.h"
#include "qemu/error-report.h"
#include "trace.h"
#include "ui/input.h"
#include "ui/console.h"
#include "sysemu/replay.h"
struct QemuInputHandlerState {
DeviceState *dev;
QemuInputHandler *handler;
int id;
int events;
QemuConsole *con;
QTAILQ_ENTRY(QemuInputHandlerState) node;
};
typedef struct QemuInputEventQueue QemuInputEventQueue;
typedef QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue)
QemuInputEventQueueHead;
struct QemuInputEventQueue {
enum {
QEMU_INPUT_QUEUE_DELAY = 1,
QEMU_INPUT_QUEUE_EVENT,
QEMU_INPUT_QUEUE_SYNC,
} type;
QEMUTimer *timer;
uint32_t delay_ms;
QemuConsole *src;
InputEvent *evt;
QTAILQ_ENTRY(QemuInputEventQueue) node;
};
static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
QTAILQ_HEAD_INITIALIZER(handlers);
static NotifierList mouse_mode_notifiers =
NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
static QemuInputEventQueueHead kbd_queue = QTAILQ_HEAD_INITIALIZER(kbd_queue);
static QEMUTimer *kbd_timer;
static uint32_t kbd_default_delay_ms = 10;
static uint32_t queue_count;
static uint32_t queue_limit = 1024;
QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
QemuInputHandler *handler)
{
QemuInputHandlerState *s = g_new0(QemuInputHandlerState, 1);
static int id = 1;
s->dev = dev;
s->handler = handler;
s->id = id++;
QTAILQ_INSERT_TAIL(&handlers, s, node);
qemu_input_check_mode_change();
return s;
}
void qemu_input_handler_activate(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
QTAILQ_INSERT_HEAD(&handlers, s, node);
qemu_input_check_mode_change();
}
void qemu_input_handler_deactivate(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
QTAILQ_INSERT_TAIL(&handlers, s, node);
qemu_input_check_mode_change();
}
void qemu_input_handler_unregister(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
g_free(s);
qemu_input_check_mode_change();
}
void qemu_input_handler_bind(QemuInputHandlerState *s,
const char *device_id, int head,
Error **errp)
{
QemuConsole *con;
Error *err = NULL;
con = qemu_console_lookup_by_device_name(device_id, head, &err);
if (err) {
error_propagate(errp, err);
return;
}
s->con = con;
}
static QemuInputHandlerState*
qemu_input_find_handler(uint32_t mask, QemuConsole *con)
{
QemuInputHandlerState *s;
QTAILQ_FOREACH(s, &handlers, node) {
if (s->con == NULL || s->con != con) {
continue;
}
if (mask & s->handler->mask) {
return s;
}
}
QTAILQ_FOREACH(s, &handlers, node) {
if (s->con != NULL) {
continue;
}
if (mask & s->handler->mask) {
return s;
}
}
return NULL;
}
void qmp_input_send_event(bool has_device, const char *device,
bool has_head, int64_t head,
InputEventList *events, Error **errp)
{
InputEventList *e;
QemuConsole *con;
Error *err = NULL;
con = NULL;
if (has_device) {
if (!has_head) {
head = 0;
}
con = qemu_console_lookup_by_device_name(device, head, &err);
if (err) {
error_propagate(errp, err);
return;
}
}
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
error_setg(errp, "VM not running");
return;
}
for (e = events; e != NULL; e = e->next) {
InputEvent *event = e->value;
if (!qemu_input_find_handler(1 << event->type, con)) {
error_setg(errp, "Input handler not found for "
"event type %s",
InputEventKind_str(event->type));
return;
}
}
for (e = events; e != NULL; e = e->next) {
InputEvent *evt = e->value;
if (evt->type == INPUT_EVENT_KIND_KEY &&
evt->u.key.data->key->type == KEY_VALUE_KIND_NUMBER) {
KeyValue *key = evt->u.key.data->key;
QKeyCode code = qemu_input_key_number_to_qcode(key->u.number.data);
qemu_input_event_send_key_qcode(con, code, evt->u.key.data->down);
} else {
qemu_input_event_send(con, evt);
}
}
qemu_input_event_sync();
}
static int qemu_input_transform_invert_abs_value(int value)
{
return (int64_t)INPUT_EVENT_ABS_MAX - value + INPUT_EVENT_ABS_MIN;
}
static void qemu_input_transform_abs_rotate(InputEvent *evt)
{
InputMoveEvent *move = evt->u.abs.data;
switch (graphic_rotate) {
case 90:
if (move->axis == INPUT_AXIS_X) {
move->axis = INPUT_AXIS_Y;
} else if (move->axis == INPUT_AXIS_Y) {
move->axis = INPUT_AXIS_X;
move->value = qemu_input_transform_invert_abs_value(move->value);
}
break;
case 180:
move->value = qemu_input_transform_invert_abs_value(move->value);
break;
case 270:
if (move->axis == INPUT_AXIS_X) {
move->axis = INPUT_AXIS_Y;
move->value = qemu_input_transform_invert_abs_value(move->value);
} else if (move->axis == INPUT_AXIS_Y) {
move->axis = INPUT_AXIS_X;
}
break;
}
}
static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
{
const char *name;
int qcode, idx = -1;
InputKeyEvent *key;
InputBtnEvent *btn;
InputMoveEvent *move;
if (src) {
idx = qemu_console_get_index(src);
}
switch (evt->type) {
case INPUT_EVENT_KIND_KEY:
key = evt->u.key.data;
switch (key->key->type) {
case KEY_VALUE_KIND_NUMBER:
qcode = qemu_input_key_number_to_qcode(key->key->u.number.data);
name = QKeyCode_str(qcode);
trace_input_event_key_number(idx, key->key->u.number.data,
name, key->down);
break;
case KEY_VALUE_KIND_QCODE:
name = QKeyCode_str(key->key->u.qcode.data);
trace_input_event_key_qcode(idx, name, key->down);
break;
case KEY_VALUE_KIND__MAX:
/* keep gcc happy */
break;
}
break;
case INPUT_EVENT_KIND_BTN:
btn = evt->u.btn.data;
name = InputButton_str(btn->button);
trace_input_event_btn(idx, name, btn->down);
break;
case INPUT_EVENT_KIND_REL:
move = evt->u.rel.data;
name = InputAxis_str(move->axis);
trace_input_event_rel(idx, name, move->value);
break;
case INPUT_EVENT_KIND_ABS:
move = evt->u.abs.data;
name = InputAxis_str(move->axis);
trace_input_event_abs(idx, name, move->value);
break;
case INPUT_EVENT_KIND__MAX:
/* keep gcc happy */
break;
}
}
static void qemu_input_queue_process(void *opaque)
{
QemuInputEventQueueHead *queue = opaque;
QemuInputEventQueue *item;
g_assert(!QTAILQ_EMPTY(queue));
item = QTAILQ_FIRST(queue);
g_assert(item->type == QEMU_INPUT_QUEUE_DELAY);
QTAILQ_REMOVE(queue, item, node);
queue_count--;
g_free(item);
while (!QTAILQ_EMPTY(queue)) {
item = QTAILQ_FIRST(queue);
switch (item->type) {
case QEMU_INPUT_QUEUE_DELAY:
timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
+ item->delay_ms);
return;
case QEMU_INPUT_QUEUE_EVENT:
qemu_input_event_send(item->src, item->evt);
qapi_free_InputEvent(item->evt);
break;
case QEMU_INPUT_QUEUE_SYNC:
qemu_input_event_sync();
break;
}
QTAILQ_REMOVE(queue, item, node);
queue_count--;
g_free(item);
}
}
static void qemu_input_queue_delay(QemuInputEventQueueHead *queue,
QEMUTimer *timer, uint32_t delay_ms)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
bool start_timer = QTAILQ_EMPTY(queue);
item->type = QEMU_INPUT_QUEUE_DELAY;
item->delay_ms = delay_ms;
item->timer = timer;
QTAILQ_INSERT_TAIL(queue, item, node);
queue_count++;
if (start_timer) {
timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
+ item->delay_ms);
}
}
static void qemu_input_queue_event(QemuInputEventQueueHead *queue,
QemuConsole *src, InputEvent *evt)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
item->type = QEMU_INPUT_QUEUE_EVENT;
item->src = src;
item->evt = evt;
QTAILQ_INSERT_TAIL(queue, item, node);
queue_count++;
}
static void qemu_input_queue_sync(QemuInputEventQueueHead *queue)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
item->type = QEMU_INPUT_QUEUE_SYNC;
QTAILQ_INSERT_TAIL(queue, item, node);
queue_count++;
}
void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt)
{
QemuInputHandlerState *s;
qemu_input_event_trace(src, evt);
/* pre processing */
if (graphic_rotate && (evt->type == INPUT_EVENT_KIND_ABS)) {
qemu_input_transform_abs_rotate(evt);
}
/* send event */
s = qemu_input_find_handler(1 << evt->type, src);
if (!s) {
return;
}
s->handler->event(s->dev, src, evt);
s->events++;
}
void qemu_input_event_send(QemuConsole *src, InputEvent *evt)
{
/* Expect all parts of QEMU to send events with QCodes exclusively.
* Key numbers are only supported as end-user input via QMP */
assert(!(evt->type == INPUT_EVENT_KIND_KEY &&
evt->u.key.data->key->type == KEY_VALUE_KIND_NUMBER));
/*
* 'sysrq' was mistakenly added to hack around the fact that
* the ps2 driver was not generating correct scancodes sequences
* when 'alt+print' was pressed. This flaw is now fixed and the
* 'sysrq' key serves no further purpose. We normalize it to
* 'print', so that downstream receivers of the event don't
* neeed to deal with this mistake
*/
if (evt->type == INPUT_EVENT_KIND_KEY &&
evt->u.key.data->key->u.qcode.data == Q_KEY_CODE_SYSRQ) {
evt->u.key.data->key->u.qcode.data = Q_KEY_CODE_PRINT;
}
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
replay_input_event(src, evt);
}
void qemu_input_event_sync_impl(void)
{
QemuInputHandlerState *s;
trace_input_event_sync();
QTAILQ_FOREACH(s, &handlers, node) {
if (!s->events) {
continue;
}
if (s->handler->sync) {
s->handler->sync(s->dev);
}
s->events = 0;
}
}
void qemu_input_event_sync(void)
{
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
replay_input_sync_event();
}
static InputEvent *qemu_input_event_new_key(KeyValue *key, bool down)
{
InputEvent *evt = g_new0(InputEvent, 1);
evt->u.key.data = g_new0(InputKeyEvent, 1);
evt->type = INPUT_EVENT_KIND_KEY;
evt->u.key.data->key = key;
evt->u.key.data->down = down;
return evt;
}
void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down)
{
InputEvent *evt;
evt = qemu_input_event_new_key(key, down);
if (QTAILQ_EMPTY(&kbd_queue)) {
qemu_input_event_send(src, evt);
qemu_input_event_sync();
qapi_free_InputEvent(evt);
} else if (queue_count < queue_limit) {
qemu_input_queue_event(&kbd_queue, src, evt);
qemu_input_queue_sync(&kbd_queue);
} else {
qapi_free_InputEvent(evt);
}
}
void qemu_input_event_send_key_number(QemuConsole *src, int num, bool down)
{
QKeyCode code = qemu_input_key_number_to_qcode(num);
qemu_input_event_send_key_qcode(src, code, down);
}
void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down)
{
KeyValue *key = g_new0(KeyValue, 1);
key->type = KEY_VALUE_KIND_QCODE;
key->u.qcode.data = q;
qemu_input_event_send_key(src, key, down);
}
void qemu_input_event_send_key_delay(uint32_t delay_ms)
{
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
if (!kbd_timer) {
kbd_timer = timer_new_full(NULL, QEMU_CLOCK_VIRTUAL,
SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
qemu_input_queue_process, &kbd_queue);
}
if (queue_count < queue_limit) {
qemu_input_queue_delay(&kbd_queue, kbd_timer,
delay_ms ? delay_ms : kbd_default_delay_ms);
}
}
InputEvent *qemu_input_event_new_btn(InputButton btn, bool down)
{
InputEvent *evt = g_new0(InputEvent, 1);
evt->u.btn.data = g_new0(InputBtnEvent, 1);
evt->type = INPUT_EVENT_KIND_BTN;
evt->u.btn.data->button = btn;
evt->u.btn.data->down = down;
return evt;
}
void qemu_input_queue_btn(QemuConsole *src, InputButton btn, bool down)
{
InputEvent *evt;
evt = qemu_input_event_new_btn(btn, down);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_update_buttons(QemuConsole *src, uint32_t *button_map,
uint32_t button_old, uint32_t button_new)
{
InputButton btn;
uint32_t mask;
for (btn = 0; btn < INPUT_BUTTON__MAX; btn++) {
mask = button_map[btn];
if ((button_old & mask) == (button_new & mask)) {
continue;
}
qemu_input_queue_btn(src, btn, button_new & mask);
}
}
bool qemu_input_is_absolute(void)
{
QemuInputHandlerState *s;
s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS,
NULL);
return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
}
int qemu_input_scale_axis(int value,
int min_in, int max_in,
int min_out, int max_out)
{
int64_t range_in = (int64_t)max_in - min_in;
int64_t range_out = (int64_t)max_out - min_out;
if (range_in < 1) {
return min_out + range_out / 2;
}
return ((int64_t)value - min_in) * range_out / range_in + min_out;
}
InputEvent *qemu_input_event_new_move(InputEventKind kind,
InputAxis axis, int value)
{
InputEvent *evt = g_new0(InputEvent, 1);
InputMoveEvent *move = g_new0(InputMoveEvent, 1);
evt->type = kind;
evt->u.rel.data = move; /* evt->u.rel is the same as evt->u.abs */
move->axis = axis;
move->value = value;
return evt;
}
void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value)
{
InputEvent *evt;
evt = qemu_input_event_new_move(INPUT_EVENT_KIND_REL, axis, value);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value,
int min_in, int max_in)
{
InputEvent *evt;
int scaled = qemu_input_scale_axis(value, min_in, max_in,
INPUT_EVENT_ABS_MIN,
INPUT_EVENT_ABS_MAX);
evt = qemu_input_event_new_move(INPUT_EVENT_KIND_ABS, axis, scaled);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_check_mode_change(void)
{
static int current_is_absolute;
int is_absolute;
is_absolute = qemu_input_is_absolute();
if (is_absolute != current_is_absolute) {
trace_input_mouse_mode(is_absolute);
notifier_list_notify(&mouse_mode_notifiers, NULL);
}
current_is_absolute = is_absolute;
}
void qemu_add_mouse_mode_change_notifier(Notifier *notify)
{
notifier_list_add(&mouse_mode_notifiers, notify);
}
void qemu_remove_mouse_mode_change_notifier(Notifier *notify)
{
notifier_remove(notify);
}
MouseInfoList *qmp_query_mice(Error **errp)
{
MouseInfoList *mice_list = NULL;
MouseInfoList *info;
QemuInputHandlerState *s;
bool current = true;
QTAILQ_FOREACH(s, &handlers, node) {
if (!(s->handler->mask &
(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS))) {
continue;
}
info = g_new0(MouseInfoList, 1);
info->value = g_new0(MouseInfo, 1);
info->value->index = s->id;
info->value->name = g_strdup(s->handler->name);
info->value->absolute = s->handler->mask & INPUT_EVENT_MASK_ABS;
info->value->current = current;
current = false;
info->next = mice_list;
mice_list = info;
}
return mice_list;
}
void hmp_mouse_set(Monitor *mon, const QDict *qdict)
{
QemuInputHandlerState *s;
int index = qdict_get_int(qdict, "index");
int found = 0;
QTAILQ_FOREACH(s, &handlers, node) {
if (s->id != index) {
continue;
}
if (!(s->handler->mask & (INPUT_EVENT_MASK_REL |
INPUT_EVENT_MASK_ABS))) {
error_report("Input device '%s' is not a mouse", s->handler->name);
return;
}
found = 1;
qemu_input_handler_activate(s);
break;
}
if (!found) {
error_report("Mouse at index '%d' not found", index);
}
qemu_input_check_mode_change();
}
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