xref: /openbmc/qemu/ui/input.c (revision 0b1183e3) 
1 #include "qemu/osdep.h"
2 #include "sysemu/sysemu.h"
3 #include "qapi-types.h"
4 #include "qemu/error-report.h"
5 #include "qmp-commands.h"
6 #include "trace.h"
7 #include "ui/input.h"
8 #include "ui/console.h"
9 #include "sysemu/replay.h"
10 
11 struct QemuInputHandlerState {
12     DeviceState       *dev;
13     QemuInputHandler  *handler;
14     int               id;
15     int               events;
16     QemuConsole       *con;
17     QTAILQ_ENTRY(QemuInputHandlerState) node;
18 };
19 
20 typedef struct QemuInputEventQueue QemuInputEventQueue;
21 struct QemuInputEventQueue {
22     enum {
23         QEMU_INPUT_QUEUE_DELAY = 1,
24         QEMU_INPUT_QUEUE_EVENT,
25         QEMU_INPUT_QUEUE_SYNC,
26     } type;
27     QEMUTimer *timer;
28     uint32_t delay_ms;
29     QemuConsole *src;
30     InputEvent *evt;
31     QTAILQ_ENTRY(QemuInputEventQueue) node;
32 };
33 
34 static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
35     QTAILQ_HEAD_INITIALIZER(handlers);
36 static NotifierList mouse_mode_notifiers =
37     NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
38 
39 static QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue) kbd_queue =
40     QTAILQ_HEAD_INITIALIZER(kbd_queue);
41 static QEMUTimer *kbd_timer;
42 static uint32_t kbd_default_delay_ms = 10;
43 static uint32_t queue_count;
44 static uint32_t queue_limit = 1024;
45 
46 QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
47                                                    QemuInputHandler *handler)
48 {
49     QemuInputHandlerState *s = g_new0(QemuInputHandlerState, 1);
50     static int id = 1;
51 
52     s->dev = dev;
53     s->handler = handler;
54     s->id = id++;
55     QTAILQ_INSERT_TAIL(&handlers, s, node);
56 
57     qemu_input_check_mode_change();
58     return s;
59 }
60 
61 void qemu_input_handler_activate(QemuInputHandlerState *s)
62 {
63     QTAILQ_REMOVE(&handlers, s, node);
64     QTAILQ_INSERT_HEAD(&handlers, s, node);
65     qemu_input_check_mode_change();
66 }
67 
68 void qemu_input_handler_deactivate(QemuInputHandlerState *s)
69 {
70     QTAILQ_REMOVE(&handlers, s, node);
71     QTAILQ_INSERT_TAIL(&handlers, s, node);
72     qemu_input_check_mode_change();
73 }
74 
75 void qemu_input_handler_unregister(QemuInputHandlerState *s)
76 {
77     QTAILQ_REMOVE(&handlers, s, node);
78     g_free(s);
79     qemu_input_check_mode_change();
80 }
81 
82 void qemu_input_handler_bind(QemuInputHandlerState *s,
83                              const char *device_id, int head,
84                              Error **errp)
85 {
86     QemuConsole *con;
87     Error *err = NULL;
88 
89     con = qemu_console_lookup_by_device_name(device_id, head, &err);
90     if (err) {
91         error_propagate(errp, err);
92         return;
93     }
94 
95     s->con = con;
96 }
97 
98 static QemuInputHandlerState*
99 qemu_input_find_handler(uint32_t mask, QemuConsole *con)
100 {
101     QemuInputHandlerState *s;
102 
103     QTAILQ_FOREACH(s, &handlers, node) {
104         if (s->con == NULL || s->con != con) {
105             continue;
106         }
107         if (mask & s->handler->mask) {
108             return s;
109         }
110     }
111 
112     QTAILQ_FOREACH(s, &handlers, node) {
113         if (s->con != NULL) {
114             continue;
115         }
116         if (mask & s->handler->mask) {
117             return s;
118         }
119     }
120     return NULL;
121 }
122 
123 void qmp_input_send_event(bool has_device, const char *device,
124                           bool has_head, int64_t head,
125                           InputEventList *events, Error **errp)
126 {
127     InputEventList *e;
128     QemuConsole *con;
129     Error *err = NULL;
130 
131     con = NULL;
132     if (has_device) {
133         if (!has_head) {
134             head = 0;
135         }
136         con = qemu_console_lookup_by_device_name(device, head, &err);
137         if (err) {
138             error_propagate(errp, err);
139             return;
140         }
141     }
142 
143     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
144         error_setg(errp, "VM not running");
145         return;
146     }
147 
148     for (e = events; e != NULL; e = e->next) {
149         InputEvent *event = e->value;
150 
151         if (!qemu_input_find_handler(1 << event->type, con)) {
152             error_setg(errp, "Input handler not found for "
153                              "event type %s",
154                             InputEventKind_lookup[event->type]);
155             return;
156         }
157     }
158 
159     for (e = events; e != NULL; e = e->next) {
160         InputEvent *event = e->value;
161 
162         qemu_input_event_send(con, event);
163     }
164 
165     qemu_input_event_sync();
166 }
167 
168 static int qemu_input_transform_invert_abs_value(int value)
169 {
170   return (int64_t)INPUT_EVENT_ABS_MAX - value + INPUT_EVENT_ABS_MIN;
171 }
172 
173 static void qemu_input_transform_abs_rotate(InputEvent *evt)
174 {
175     InputMoveEvent *move = evt->u.abs.data;
176     switch (graphic_rotate) {
177     case 90:
178         if (move->axis == INPUT_AXIS_X) {
179             move->axis = INPUT_AXIS_Y;
180         } else if (move->axis == INPUT_AXIS_Y) {
181             move->axis = INPUT_AXIS_X;
182             move->value = qemu_input_transform_invert_abs_value(move->value);
183         }
184         break;
185     case 180:
186         move->value = qemu_input_transform_invert_abs_value(move->value);
187         break;
188     case 270:
189         if (move->axis == INPUT_AXIS_X) {
190             move->axis = INPUT_AXIS_Y;
191             move->value = qemu_input_transform_invert_abs_value(move->value);
192         } else if (move->axis == INPUT_AXIS_Y) {
193             move->axis = INPUT_AXIS_X;
194         }
195         break;
196     }
197 }
198 
199 static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
200 {
201     const char *name;
202     int qcode, idx = -1;
203     InputKeyEvent *key;
204     InputBtnEvent *btn;
205     InputMoveEvent *move;
206 
207     if (src) {
208         idx = qemu_console_get_index(src);
209     }
210     switch (evt->type) {
211     case INPUT_EVENT_KIND_KEY:
212         key = evt->u.key.data;
213         switch (key->key->type) {
214         case KEY_VALUE_KIND_NUMBER:
215             qcode = qemu_input_key_number_to_qcode(key->key->u.number.data);
216             name = QKeyCode_lookup[qcode];
217             trace_input_event_key_number(idx, key->key->u.number.data,
218                                          name, key->down);
219             break;
220         case KEY_VALUE_KIND_QCODE:
221             name = QKeyCode_lookup[key->key->u.qcode.data];
222             trace_input_event_key_qcode(idx, name, key->down);
223             break;
224         case KEY_VALUE_KIND__MAX:
225             /* keep gcc happy */
226             break;
227         }
228         break;
229     case INPUT_EVENT_KIND_BTN:
230         btn = evt->u.btn.data;
231         name = InputButton_lookup[btn->button];
232         trace_input_event_btn(idx, name, btn->down);
233         break;
234     case INPUT_EVENT_KIND_REL:
235         move = evt->u.rel.data;
236         name = InputAxis_lookup[move->axis];
237         trace_input_event_rel(idx, name, move->value);
238         break;
239     case INPUT_EVENT_KIND_ABS:
240         move = evt->u.abs.data;
241         name = InputAxis_lookup[move->axis];
242         trace_input_event_abs(idx, name, move->value);
243         break;
244     case INPUT_EVENT_KIND__MAX:
245         /* keep gcc happy */
246         break;
247     }
248 }
249 
250 static void qemu_input_queue_process(void *opaque)
251 {
252     struct QemuInputEventQueueHead *queue = opaque;
253     QemuInputEventQueue *item;
254 
255     g_assert(!QTAILQ_EMPTY(queue));
256     item = QTAILQ_FIRST(queue);
257     g_assert(item->type == QEMU_INPUT_QUEUE_DELAY);
258     QTAILQ_REMOVE(queue, item, node);
259     queue_count--;
260     g_free(item);
261 
262     while (!QTAILQ_EMPTY(queue)) {
263         item = QTAILQ_FIRST(queue);
264         switch (item->type) {
265         case QEMU_INPUT_QUEUE_DELAY:
266             timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
267                       + item->delay_ms);
268             return;
269         case QEMU_INPUT_QUEUE_EVENT:
270             qemu_input_event_send(item->src, item->evt);
271             qapi_free_InputEvent(item->evt);
272             break;
273         case QEMU_INPUT_QUEUE_SYNC:
274             qemu_input_event_sync();
275             break;
276         }
277         QTAILQ_REMOVE(queue, item, node);
278         queue_count--;
279         g_free(item);
280     }
281 }
282 
283 static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue,
284                                    QEMUTimer *timer, uint32_t delay_ms)
285 {
286     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
287     bool start_timer = QTAILQ_EMPTY(queue);
288 
289     item->type = QEMU_INPUT_QUEUE_DELAY;
290     item->delay_ms = delay_ms;
291     item->timer = timer;
292     QTAILQ_INSERT_TAIL(queue, item, node);
293     queue_count++;
294 
295     if (start_timer) {
296         timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
297                   + item->delay_ms);
298     }
299 }
300 
301 static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue,
302                                    QemuConsole *src, InputEvent *evt)
303 {
304     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
305 
306     item->type = QEMU_INPUT_QUEUE_EVENT;
307     item->src = src;
308     item->evt = evt;
309     QTAILQ_INSERT_TAIL(queue, item, node);
310     queue_count++;
311 }
312 
313 static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue)
314 {
315     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
316 
317     item->type = QEMU_INPUT_QUEUE_SYNC;
318     QTAILQ_INSERT_TAIL(queue, item, node);
319     queue_count++;
320 }
321 
322 void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt)
323 {
324     QemuInputHandlerState *s;
325 
326     qemu_input_event_trace(src, evt);
327 
328     /* pre processing */
329     if (graphic_rotate && (evt->type == INPUT_EVENT_KIND_ABS)) {
330             qemu_input_transform_abs_rotate(evt);
331     }
332 
333     /* send event */
334     s = qemu_input_find_handler(1 << evt->type, src);
335     if (!s) {
336         return;
337     }
338     s->handler->event(s->dev, src, evt);
339     s->events++;
340 }
341 
342 void qemu_input_event_send(QemuConsole *src, InputEvent *evt)
343 {
344     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
345         return;
346     }
347 
348     replay_input_event(src, evt);
349 }
350 
351 void qemu_input_event_sync_impl(void)
352 {
353     QemuInputHandlerState *s;
354 
355     trace_input_event_sync();
356 
357     QTAILQ_FOREACH(s, &handlers, node) {
358         if (!s->events) {
359             continue;
360         }
361         if (s->handler->sync) {
362             s->handler->sync(s->dev);
363         }
364         s->events = 0;
365     }
366 }
367 
368 void qemu_input_event_sync(void)
369 {
370     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
371         return;
372     }
373 
374     replay_input_sync_event();
375 }
376 
377 InputEvent *qemu_input_event_new_key(KeyValue *key, bool down)
378 {
379     InputEvent *evt = g_new0(InputEvent, 1);
380     evt->u.key.data = g_new0(InputKeyEvent, 1);
381     evt->type = INPUT_EVENT_KIND_KEY;
382     evt->u.key.data->key = key;
383     evt->u.key.data->down = down;
384     return evt;
385 }
386 
387 void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down)
388 {
389     InputEvent *evt;
390     evt = qemu_input_event_new_key(key, down);
391     if (QTAILQ_EMPTY(&kbd_queue)) {
392         qemu_input_event_send(src, evt);
393         qemu_input_event_sync();
394         qapi_free_InputEvent(evt);
395     } else if (queue_count < queue_limit) {
396         qemu_input_queue_event(&kbd_queue, src, evt);
397         qemu_input_queue_sync(&kbd_queue);
398     }
399 }
400 
401 void qemu_input_event_send_key_number(QemuConsole *src, int num, bool down)
402 {
403     KeyValue *key = g_new0(KeyValue, 1);
404     key->type = KEY_VALUE_KIND_NUMBER;
405     key->u.number.data = num;
406     qemu_input_event_send_key(src, key, down);
407 }
408 
409 void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down)
410 {
411     KeyValue *key = g_new0(KeyValue, 1);
412     key->type = KEY_VALUE_KIND_QCODE;
413     key->u.qcode.data = q;
414     qemu_input_event_send_key(src, key, down);
415 }
416 
417 void qemu_input_event_send_key_delay(uint32_t delay_ms)
418 {
419     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
420         return;
421     }
422 
423     if (!kbd_timer) {
424         kbd_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, qemu_input_queue_process,
425                                  &kbd_queue);
426     }
427     if (queue_count < queue_limit) {
428         qemu_input_queue_delay(&kbd_queue, kbd_timer,
429                                delay_ms ? delay_ms : kbd_default_delay_ms);
430     }
431 }
432 
433 InputEvent *qemu_input_event_new_btn(InputButton btn, bool down)
434 {
435     InputEvent *evt = g_new0(InputEvent, 1);
436     evt->u.btn.data = g_new0(InputBtnEvent, 1);
437     evt->type = INPUT_EVENT_KIND_BTN;
438     evt->u.btn.data->button = btn;
439     evt->u.btn.data->down = down;
440     return evt;
441 }
442 
443 void qemu_input_queue_btn(QemuConsole *src, InputButton btn, bool down)
444 {
445     InputEvent *evt;
446     evt = qemu_input_event_new_btn(btn, down);
447     qemu_input_event_send(src, evt);
448     qapi_free_InputEvent(evt);
449 }
450 
451 void qemu_input_update_buttons(QemuConsole *src, uint32_t *button_map,
452                                uint32_t button_old, uint32_t button_new)
453 {
454     InputButton btn;
455     uint32_t mask;
456 
457     for (btn = 0; btn < INPUT_BUTTON__MAX; btn++) {
458         mask = button_map[btn];
459         if ((button_old & mask) == (button_new & mask)) {
460             continue;
461         }
462         qemu_input_queue_btn(src, btn, button_new & mask);
463     }
464 }
465 
466 bool qemu_input_is_absolute(void)
467 {
468     QemuInputHandlerState *s;
469 
470     s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS,
471                                 NULL);
472     return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
473 }
474 
475 int qemu_input_scale_axis(int value,
476                           int min_in, int max_in,
477                           int min_out, int max_out)
478 {
479     int64_t range_in = (int64_t)max_in - min_in;
480     int64_t range_out = (int64_t)max_out - min_out;
481 
482     if (range_in < 1) {
483         return min_out + range_out / 2;
484     }
485     return ((int64_t)value - min_in) * range_out / range_in + min_out;
486 }
487 
488 InputEvent *qemu_input_event_new_move(InputEventKind kind,
489                                       InputAxis axis, int value)
490 {
491     InputEvent *evt = g_new0(InputEvent, 1);
492     InputMoveEvent *move = g_new0(InputMoveEvent, 1);
493 
494     evt->type = kind;
495     evt->u.rel.data = move; /* evt->u.rel is the same as evt->u.abs */
496     move->axis = axis;
497     move->value = value;
498     return evt;
499 }
500 
501 void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value)
502 {
503     InputEvent *evt;
504     evt = qemu_input_event_new_move(INPUT_EVENT_KIND_REL, axis, value);
505     qemu_input_event_send(src, evt);
506     qapi_free_InputEvent(evt);
507 }
508 
509 void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value,
510                           int min_in, int max_in)
511 {
512     InputEvent *evt;
513     int scaled = qemu_input_scale_axis(value, min_in, max_in,
514                                        INPUT_EVENT_ABS_MIN,
515                                        INPUT_EVENT_ABS_MAX);
516     evt = qemu_input_event_new_move(INPUT_EVENT_KIND_ABS, axis, scaled);
517     qemu_input_event_send(src, evt);
518     qapi_free_InputEvent(evt);
519 }
520 
521 void qemu_input_check_mode_change(void)
522 {
523     static int current_is_absolute;
524     int is_absolute;
525 
526     is_absolute = qemu_input_is_absolute();
527 
528     if (is_absolute != current_is_absolute) {
529         trace_input_mouse_mode(is_absolute);
530         notifier_list_notify(&mouse_mode_notifiers, NULL);
531     }
532 
533     current_is_absolute = is_absolute;
534 }
535 
536 void qemu_add_mouse_mode_change_notifier(Notifier *notify)
537 {
538     notifier_list_add(&mouse_mode_notifiers, notify);
539 }
540 
541 void qemu_remove_mouse_mode_change_notifier(Notifier *notify)
542 {
543     notifier_remove(notify);
544 }
545 
546 MouseInfoList *qmp_query_mice(Error **errp)
547 {
548     MouseInfoList *mice_list = NULL;
549     MouseInfoList *info;
550     QemuInputHandlerState *s;
551     bool current = true;
552 
553     QTAILQ_FOREACH(s, &handlers, node) {
554         if (!(s->handler->mask &
555               (INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS))) {
556             continue;
557         }
558 
559         info = g_new0(MouseInfoList, 1);
560         info->value = g_new0(MouseInfo, 1);
561         info->value->index = s->id;
562         info->value->name = g_strdup(s->handler->name);
563         info->value->absolute = s->handler->mask & INPUT_EVENT_MASK_ABS;
564         info->value->current = current;
565 
566         current = false;
567         info->next = mice_list;
568         mice_list = info;
569     }
570 
571     return mice_list;
572 }
573 
574 void hmp_mouse_set(Monitor *mon, const QDict *qdict)
575 {
576     QemuInputHandlerState *s;
577     int index = qdict_get_int(qdict, "index");
578     int found = 0;
579 
580     QTAILQ_FOREACH(s, &handlers, node) {
581         if (s->id != index) {
582             continue;
583         }
584         if (!(s->handler->mask & (INPUT_EVENT_MASK_REL |
585                                   INPUT_EVENT_MASK_ABS))) {
586             error_report("Input device '%s' is not a mouse", s->handler->name);
587             return;
588         }
589         found = 1;
590         qemu_input_handler_activate(s);
591         break;
592     }
593 
594     if (!found) {
595         error_report("Mouse at index '%d' not found", index);
596     }
597 
598     qemu_input_check_mode_change();
599 }
600