ui/input.c

   1 #include "qemu/osdep.h"
   2 #include "sysemu/sysemu.h"
   3 #include "qapi/error.h"
   4 #include "qapi/qapi-commands-ui.h"
   5 #include "trace.h"
   6 #include "ui/input.h"
   7 #include "ui/console.h"
   8 #include "sysemu/replay.h"
   9 #include "sysemu/runstate.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 typedef QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue)
  22     QemuInputEventQueueHead;
  23
  24 struct QemuInputEventQueue {
  25     enum {
  26         QEMU_INPUT_QUEUE_DELAY = 1,
  27         QEMU_INPUT_QUEUE_EVENT,
  28         QEMU_INPUT_QUEUE_SYNC,
  29     } type;
  30     QEMUTimer *timer;
  31     uint32_t delay_ms;
  32     QemuConsole *src;
  33     InputEvent *evt;
  34     QTAILQ_ENTRY(QemuInputEventQueue) node;
  35 };
  36
  37 static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
  38     QTAILQ_HEAD_INITIALIZER(handlers);
  39 static NotifierList mouse_mode_notifiers =
  40     NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
  41
  42 static QemuInputEventQueueHead kbd_queue = QTAILQ_HEAD_INITIALIZER(kbd_queue);
  43 static QEMUTimer *kbd_timer;
  44 static uint32_t kbd_default_delay_ms = 10;
  45 static uint32_t queue_count;
  46 static uint32_t queue_limit = 1024;
  47
  48 QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
  49                                                    QemuInputHandler *handler)
  50 {
  51     QemuInputHandlerState *s = g_new0(QemuInputHandlerState, 1);
  52     static int id = 1;
  53
  54     s->dev = dev;
  55     s->handler = handler;
  56     s->id = id++;
  57     QTAILQ_INSERT_TAIL(&handlers, s, node);
  58
  59     qemu_input_check_mode_change();
  60     return s;
  61 }
  62
  63 void qemu_input_handler_activate(QemuInputHandlerState *s)
  64 {
  65     QTAILQ_REMOVE(&handlers, s, node);
  66     QTAILQ_INSERT_HEAD(&handlers, s, node);
  67     qemu_input_check_mode_change();
  68 }
  69
  70 void qemu_input_handler_deactivate(QemuInputHandlerState *s)
  71 {
  72     QTAILQ_REMOVE(&handlers, s, node);
  73     QTAILQ_INSERT_TAIL(&handlers, s, node);
  74     qemu_input_check_mode_change();
  75 }
  76
  77 void qemu_input_handler_unregister(QemuInputHandlerState *s)
  78 {
  79     QTAILQ_REMOVE(&handlers, s, node);
  80     g_free(s);
  81     qemu_input_check_mode_change();
  82 }
  83
  84 void qemu_input_handler_bind(QemuInputHandlerState *s,
  85                              const char *device_id, int head,
  86                              Error **errp)
  87 {
  88     QemuConsole *con;
  89     Error *err = NULL;
  90
  91     con = qemu_console_lookup_by_device_name(device_id, head, &err);
  92     if (err) {
  93         error_propagate(errp, err);
  94         return;
  95     }
  96
  97     s->con = con;
  98 }
  99
 100 static QemuInputHandlerState*
 101 qemu_input_find_handler(uint32_t mask, QemuConsole *con)
 102 {
 103     QemuInputHandlerState *s;
 104
 105     QTAILQ_FOREACH(s, &handlers, node) {
 106         if (s->con == NULL || s->con != con) {
 107             continue;
 108         }
 109         if (mask & s->handler->mask) {
 110             return s;
 111         }
 112     }
 113
 114     QTAILQ_FOREACH(s, &handlers, node) {
 115         if (s->con != NULL) {
 116             continue;
 117         }
 118         if (mask & s->handler->mask) {
 119             return s;
 120         }
 121     }
 122     return NULL;
 123 }
 124
 125 void qmp_input_send_event(const char *device,
 126                           bool has_head, int64_t head,
 127                           InputEventList *events, Error **errp)
 128 {
 129     InputEventList *e;
 130     QemuConsole *con;
 131     Error *err = NULL;
 132
 133     con = NULL;
 134     if (device) {
 135         if (!has_head) {
 136             head = 0;
 137         }
 138         con = qemu_console_lookup_by_device_name(device, head, &err);
 139         if (err) {
 140             error_propagate(errp, err);
 141             return;
 142         }
 143     }
 144
 145     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
 146         error_setg(errp, "VM not running");
 147         return;
 148     }
 149
 150     for (e = events; e != NULL; e = e->next) {
 151         InputEvent *event = e->value;
 152
 153         if (!qemu_input_find_handler(1 << event->type, con)) {
 154             error_setg(errp, "Input handler not found for "
 155                              "event type %s",
 156                             InputEventKind_str(event->type));
 157             return;
 158         }
 159     }
 160
 161     for (e = events; e != NULL; e = e->next) {
 162         InputEvent *evt = e->value;
 163
 164         if (evt->type == INPUT_EVENT_KIND_KEY &&
 165             evt->u.key.data->key->type == KEY_VALUE_KIND_NUMBER) {
 166             KeyValue *key = evt->u.key.data->key;
 167             QKeyCode code = qemu_input_key_number_to_qcode(key->u.number.data);
 168             qemu_input_event_send_key_qcode(con, code, evt->u.key.data->down);
 169         } else {
 170             qemu_input_event_send(con, evt);
 171         }
 172     }
 173
 174     qemu_input_event_sync();
 175 }
 176
 177 static int qemu_input_transform_invert_abs_value(int value)
 178 {
 179   return (int64_t)INPUT_EVENT_ABS_MAX - value + INPUT_EVENT_ABS_MIN;
 180 }
 181
 182 static void qemu_input_transform_abs_rotate(InputEvent *evt)
 183 {
 184     InputMoveEvent *move = evt->u.abs.data;
 185     switch (graphic_rotate) {
 186     case 90:
 187         if (move->axis == INPUT_AXIS_X) {
 188             move->axis = INPUT_AXIS_Y;
 189         } else if (move->axis == INPUT_AXIS_Y) {
 190             move->axis = INPUT_AXIS_X;
 191             move->value = qemu_input_transform_invert_abs_value(move->value);
 192         }
 193         break;
 194     case 180:
 195         move->value = qemu_input_transform_invert_abs_value(move->value);
 196         break;
 197     case 270:
 198         if (move->axis == INPUT_AXIS_X) {
 199             move->axis = INPUT_AXIS_Y;
 200             move->value = qemu_input_transform_invert_abs_value(move->value);
 201         } else if (move->axis == INPUT_AXIS_Y) {
 202             move->axis = INPUT_AXIS_X;
 203         }
 204         break;
 205     }
 206 }
 207
 208 static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
 209 {
 210     const char *name;
 211     int qcode, idx = -1;
 212     InputKeyEvent *key;
 213     InputBtnEvent *btn;
 214     InputMoveEvent *move;
 215     InputMultiTouchEvent *mtt;
 216
 217     if (src) {
 218         idx = qemu_console_get_index(src);
 219     }
 220     switch (evt->type) {
 221     case INPUT_EVENT_KIND_KEY:
 222         key = evt->u.key.data;
 223         switch (key->key->type) {
 224         case KEY_VALUE_KIND_NUMBER:
 225             qcode = qemu_input_key_number_to_qcode(key->key->u.number.data);
 226             name = QKeyCode_str(qcode);
 227             trace_input_event_key_number(idx, key->key->u.number.data,
 228                                          name, key->down);
 229             break;
 230         case KEY_VALUE_KIND_QCODE:
 231             name = QKeyCode_str(key->key->u.qcode.data);
 232             trace_input_event_key_qcode(idx, name, key->down);
 233             break;
 234         case KEY_VALUE_KIND__MAX:
 235             /* keep gcc happy */
 236             break;
 237         }
 238         break;
 239     case INPUT_EVENT_KIND_BTN:
 240         btn = evt->u.btn.data;
 241         name = InputButton_str(btn->button);
 242         trace_input_event_btn(idx, name, btn->down);
 243         break;
 244     case INPUT_EVENT_KIND_REL:
 245         move = evt->u.rel.data;
 246         name = InputAxis_str(move->axis);
 247         trace_input_event_rel(idx, name, move->value);
 248         break;
 249     case INPUT_EVENT_KIND_ABS:
 250         move = evt->u.abs.data;
 251         name = InputAxis_str(move->axis);
 252         trace_input_event_abs(idx, name, move->value);
 253         break;
 254     case INPUT_EVENT_KIND_MTT:
 255         mtt = evt->u.mtt.data;
 256         name = InputAxis_str(mtt->axis);
 257         trace_input_event_mtt(idx, name, mtt->value);
 258         break;
 259     case INPUT_EVENT_KIND__MAX:
 260         /* keep gcc happy */
 261         break;
 262     }
 263 }
 264
 265 static void qemu_input_queue_process(void *opaque)
 266 {
 267     QemuInputEventQueueHead *queue = opaque;
 268     QemuInputEventQueue *item;
 269
 270     g_assert(!QTAILQ_EMPTY(queue));
 271     item = QTAILQ_FIRST(queue);
 272     g_assert(item->type == QEMU_INPUT_QUEUE_DELAY);
 273     QTAILQ_REMOVE(queue, item, node);
 274     queue_count--;
 275     g_free(item);
 276
 277     while (!QTAILQ_EMPTY(queue)) {
 278         item = QTAILQ_FIRST(queue);
 279         switch (item->type) {
 280         case QEMU_INPUT_QUEUE_DELAY:
 281             timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
 282                       + item->delay_ms);
 283             return;
 284         case QEMU_INPUT_QUEUE_EVENT:
 285             qemu_input_event_send(item->src, item->evt);
 286             qapi_free_InputEvent(item->evt);
 287             break;
 288         case QEMU_INPUT_QUEUE_SYNC:
 289             qemu_input_event_sync();
 290             break;
 291         }
 292         QTAILQ_REMOVE(queue, item, node);
 293         queue_count--;
 294         g_free(item);
 295     }
 296 }
 297
 298 static void qemu_input_queue_delay(QemuInputEventQueueHead *queue,
 299                                    QEMUTimer *timer, uint32_t delay_ms)
 300 {
 301     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
 302     bool start_timer = QTAILQ_EMPTY(queue);
 303
 304     item->type = QEMU_INPUT_QUEUE_DELAY;
 305     item->delay_ms = delay_ms;
 306     item->timer = timer;
 307     QTAILQ_INSERT_TAIL(queue, item, node);
 308     queue_count++;
 309
 310     if (start_timer) {
 311         timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
 312                   + item->delay_ms);
 313     }
 314 }
 315
 316 static void qemu_input_queue_event(QemuInputEventQueueHead *queue,
 317                                    QemuConsole *src, InputEvent *evt)
 318 {
 319     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
 320
 321     item->type = QEMU_INPUT_QUEUE_EVENT;
 322     item->src = src;
 323     item->evt = evt;
 324     QTAILQ_INSERT_TAIL(queue, item, node);
 325     queue_count++;
 326 }
 327
 328 static void qemu_input_queue_sync(QemuInputEventQueueHead *queue)
 329 {
 330     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
 331
 332     item->type = QEMU_INPUT_QUEUE_SYNC;
 333     QTAILQ_INSERT_TAIL(queue, item, node);
 334     queue_count++;
 335 }
 336
 337 void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt)
 338 {
 339     QemuInputHandlerState *s;
 340
 341     qemu_input_event_trace(src, evt);
 342
 343     /* pre processing */
 344     if (graphic_rotate && (evt->type == INPUT_EVENT_KIND_ABS)) {
 345             qemu_input_transform_abs_rotate(evt);
 346     }
 347
 348     /* send event */
 349     s = qemu_input_find_handler(1 << evt->type, src);
 350     if (!s) {
 351         return;
 352     }
 353     s->handler->event(s->dev, src, evt);
 354     s->events++;
 355 }
 356
 357 void qemu_input_event_send(QemuConsole *src, InputEvent *evt)
 358 {
 359     /* Expect all parts of QEMU to send events with QCodes exclusively.
 360      * Key numbers are only supported as end-user input via QMP */
 361     assert(!(evt->type == INPUT_EVENT_KIND_KEY &&
 362              evt->u.key.data->key->type == KEY_VALUE_KIND_NUMBER));
 363
 364
 365     /*
 366      * 'sysrq' was mistakenly added to hack around the fact that
 367      * the ps2 driver was not generating correct scancodes sequences
 368      * when 'alt+print' was pressed. This flaw is now fixed and the
 369      * 'sysrq' key serves no further purpose. We normalize it to
 370      * 'print', so that downstream receivers of the event don't
 371      * need to deal with this mistake
 372      */
 373     if (evt->type == INPUT_EVENT_KIND_KEY &&
 374         evt->u.key.data->key->u.qcode.data == Q_KEY_CODE_SYSRQ) {
 375         evt->u.key.data->key->u.qcode.data = Q_KEY_CODE_PRINT;
 376     }
 377
 378     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
 379         return;
 380     }
 381
 382     replay_input_event(src, evt);
 383 }
 384
 385 void qemu_input_event_sync_impl(void)
 386 {
 387     QemuInputHandlerState *s;
 388
 389     trace_input_event_sync();
 390
 391     QTAILQ_FOREACH(s, &handlers, node) {
 392         if (!s->events) {
 393             continue;
 394         }
 395         if (s->handler->sync) {
 396             s->handler->sync(s->dev);
 397         }
 398         s->events = 0;
 399     }
 400 }
 401
 402 void qemu_input_event_sync(void)
 403 {
 404     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
 405         return;
 406     }
 407
 408     replay_input_sync_event();
 409 }
 410
 411 static InputEvent *qemu_input_event_new_key(KeyValue *key, bool down)
 412 {
 413     InputEvent *evt = g_new0(InputEvent, 1);
 414     evt->u.key.data = g_new0(InputKeyEvent, 1);
 415     evt->type = INPUT_EVENT_KIND_KEY;
 416     evt->u.key.data->key = key;
 417     evt->u.key.data->down = down;
 418     return evt;
 419 }
 420
 421 void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down)
 422 {
 423     InputEvent *evt;
 424     evt = qemu_input_event_new_key(key, down);
 425     if (QTAILQ_EMPTY(&kbd_queue)) {
 426         qemu_input_event_send(src, evt);
 427         qemu_input_event_sync();
 428         qapi_free_InputEvent(evt);
 429     } else if (queue_count < queue_limit) {
 430         qemu_input_queue_event(&kbd_queue, src, evt);
 431         qemu_input_queue_sync(&kbd_queue);
 432     } else {
 433         qapi_free_InputEvent(evt);
 434     }
 435 }
 436
 437 void qemu_input_event_send_key_number(QemuConsole *src, int num, bool down)
 438 {
 439     QKeyCode code = qemu_input_key_number_to_qcode(num);
 440     qemu_input_event_send_key_qcode(src, code, down);
 441 }
 442
 443 void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down)
 444 {
 445     KeyValue *key = g_new0(KeyValue, 1);
 446     key->type = KEY_VALUE_KIND_QCODE;
 447     key->u.qcode.data = q;
 448     qemu_input_event_send_key(src, key, down);
 449 }
 450
 451 void qemu_input_event_send_key_delay(uint32_t delay_ms)
 452 {
 453     if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
 454         return;
 455     }
 456
 457     if (!kbd_timer) {
 458         kbd_timer = timer_new_full(NULL, QEMU_CLOCK_VIRTUAL,
 459                                    SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
 460                                    qemu_input_queue_process, &kbd_queue);
 461     }
 462     if (queue_count < queue_limit) {
 463         qemu_input_queue_delay(&kbd_queue, kbd_timer,
 464                                delay_ms ? delay_ms : kbd_default_delay_ms);
 465     }
 466 }
 467
 468 void qemu_input_queue_btn(QemuConsole *src, InputButton btn, bool down)
 469 {
 470     InputBtnEvent bevt = {
 471         .button = btn,
 472         .down = down,
 473     };
 474     InputEvent evt = {
 475         .type = INPUT_EVENT_KIND_BTN,
 476         .u.btn.data = &bevt,
 477     };
 478
 479     qemu_input_event_send(src, &evt);
 480 }
 481
 482 void qemu_input_update_buttons(QemuConsole *src, uint32_t *button_map,
 483                                uint32_t button_old, uint32_t button_new)
 484 {
 485     InputButton btn;
 486     uint32_t mask;
 487
 488     for (btn = 0; btn < INPUT_BUTTON__MAX; btn++) {
 489         mask = button_map[btn];
 490         if ((button_old & mask) == (button_new & mask)) {
 491             continue;
 492         }
 493         qemu_input_queue_btn(src, btn, button_new & mask);
 494     }
 495 }
 496
 497 bool qemu_input_is_absolute(void)
 498 {
 499     QemuInputHandlerState *s;
 500
 501     s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS,
 502                                 NULL);
 503     return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
 504 }
 505
 506 int qemu_input_scale_axis(int value,
 507                           int min_in, int max_in,
 508                           int min_out, int max_out)
 509 {
 510     int64_t range_in = (int64_t)max_in - min_in;
 511     int64_t range_out = (int64_t)max_out - min_out;
 512
 513     if (range_in < 1) {
 514         return min_out + range_out / 2;
 515     }
 516     return ((int64_t)value - min_in) * range_out / range_in + min_out;
 517 }
 518
 519 void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value)
 520 {
 521     InputMoveEvent move = {
 522         .axis = axis,
 523         .value = value,
 524     };
 525     InputEvent evt = {
 526         .type = INPUT_EVENT_KIND_REL,
 527         .u.rel.data = &move,
 528     };
 529
 530     qemu_input_event_send(src, &evt);
 531 }
 532
 533 void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value,
 534                           int min_in, int max_in)
 535 {
 536     InputMoveEvent move = {
 537         .axis = axis,
 538         .value = qemu_input_scale_axis(value, min_in, max_in,
 539                                        INPUT_EVENT_ABS_MIN,
 540                                        INPUT_EVENT_ABS_MAX),
 541     };
 542     InputEvent evt = {
 543         .type = INPUT_EVENT_KIND_ABS,
 544         .u.abs.data = &move,
 545     };
 546
 547     qemu_input_event_send(src, &evt);
 548 }
 549
 550 void qemu_input_queue_mtt(QemuConsole *src, InputMultiTouchType type,
 551                           int slot, int tracking_id)
 552 {
 553     InputMultiTouchEvent mtt = {
 554         .type = type,
 555         .slot = slot,
 556         .tracking_id = tracking_id,
 557     };
 558     InputEvent evt = {
 559         .type = INPUT_EVENT_KIND_MTT,
 560         .u.mtt.data = &mtt,
 561     };
 562
 563     qemu_input_event_send(src, &evt);
 564 }
 565
 566 void qemu_input_queue_mtt_abs(QemuConsole *src, InputAxis axis, int value,
 567                               int min_in, int max_in, int slot, int tracking_id)
 568 {
 569     InputMultiTouchEvent mtt = {
 570         .type = INPUT_MULTI_TOUCH_TYPE_DATA,
 571         .slot = slot,
 572         .tracking_id = tracking_id,
 573         .axis = axis,
 574         .value = qemu_input_scale_axis(value, min_in, max_in,
 575                                        INPUT_EVENT_ABS_MIN,
 576                                        INPUT_EVENT_ABS_MAX),
 577     };
 578     InputEvent evt = {
 579         .type = INPUT_EVENT_KIND_MTT,
 580         .u.mtt.data = &mtt,
 581     };
 582
 583     qemu_input_event_send(src, &evt);
 584 }
 585
 586 void qemu_input_check_mode_change(void)
 587 {
 588     static int current_is_absolute;
 589     int is_absolute;
 590
 591     is_absolute = qemu_input_is_absolute();
 592
 593     if (is_absolute != current_is_absolute) {
 594         trace_input_mouse_mode(is_absolute);
 595         notifier_list_notify(&mouse_mode_notifiers, NULL);
 596     }
 597
 598     current_is_absolute = is_absolute;
 599 }
 600
 601 void qemu_add_mouse_mode_change_notifier(Notifier *notify)
 602 {
 603     notifier_list_add(&mouse_mode_notifiers, notify);
 604 }
 605
 606 void qemu_remove_mouse_mode_change_notifier(Notifier *notify)
 607 {
 608     notifier_remove(notify);
 609 }
 610
 611 MouseInfoList *qmp_query_mice(Error **errp)
 612 {
 613     MouseInfoList *mice_list = NULL;
 614     MouseInfo *info;
 615     QemuInputHandlerState *s;
 616     bool current = true;
 617
 618     QTAILQ_FOREACH(s, &handlers, node) {
 619         if (!(s->handler->mask &
 620               (INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS))) {
 621             continue;
 622         }
 623
 624         info = g_new0(MouseInfo, 1);
 625         info->index = s->id;
 626         info->name = g_strdup(s->handler->name);
 627         info->absolute = s->handler->mask & INPUT_EVENT_MASK_ABS;
 628         info->current = current;
 629
 630         current = false;
 631         QAPI_LIST_PREPEND(mice_list, info);
 632     }
 633
 634     return mice_list;
 635 }
 636
 637 bool qemu_mouse_set(int index, Error **errp)
 638 {
 639     QemuInputHandlerState *s;
 640
 641     QTAILQ_FOREACH(s, &handlers, node) {
 642         if (s->id == index) {
 643             break;
 644         }
 645     }
 646
 647     if (!s) {
 648         error_setg(errp, "Mouse at index '%d' not found", index);
 649         return false;
 650     }
 651
 652     if (!(s->handler->mask & (INPUT_EVENT_MASK_REL |
 653                               INPUT_EVENT_MASK_ABS))) {
 654         error_setg(errp, "Input device '%s' is not a mouse",
 655                    s->handler->name);
 656         return false;
 657     }
 658
 659     qemu_input_handler_activate(s);
 660     qemu_input_check_mode_change();
 661     return true;
 662 }