74 	struct uinput_device	*udev = input_get_drvdata(dev);  in uinput_dev_event()  local
77 	udev->buff[udev->head].type = type;  in uinput_dev_event()
78 	udev->buff[udev->head].code = code;  in uinput_dev_event()
79 	udev->buff[udev->head].value = value;  in uinput_dev_event()
81 	udev->buff[udev->head].input_event_sec = ts.tv_sec;  in uinput_dev_event()
82 	udev->buff[udev->head].input_event_usec = ts.tv_nsec / NSEC_PER_USEC;  in uinput_dev_event()
83 	udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE;  in uinput_dev_event()
85 	wake_up_interruptible(&udev->waitq);  in uinput_dev_event()
91 static bool uinput_request_alloc_id(struct uinput_device *udev,  in uinput_request_alloc_id()  argument
97 	spin_lock(&udev->requests_lock);  in uinput_request_alloc_id()
100 		if (!udev->requests[id]) {  in uinput_request_alloc_id()
102 			udev->requests[id] = request;  in uinput_request_alloc_id()
108 	spin_unlock(&udev->requests_lock);  in uinput_request_alloc_id()
112 static struct uinput_request *uinput_request_find(struct uinput_device *udev,  in uinput_request_find()  argument
119 	return udev->requests[id];  in uinput_request_find()
122 static int uinput_request_reserve_slot(struct uinput_device *udev,  in uinput_request_reserve_slot()  argument
126 	return wait_event_interruptible(udev->requests_waitq,  in uinput_request_reserve_slot()
127 					uinput_request_alloc_id(udev, request));  in uinput_request_reserve_slot()
130 static void uinput_request_release_slot(struct uinput_device *udev,  in uinput_request_release_slot()  argument
134 	spin_lock(&udev->requests_lock);  in uinput_request_release_slot()
135 	udev->requests[id] = NULL;  in uinput_request_release_slot()
136 	spin_unlock(&udev->requests_lock);  in uinput_request_release_slot()
138 	wake_up(&udev->requests_waitq);  in uinput_request_release_slot()
141 static int uinput_request_send(struct uinput_device *udev,  in uinput_request_send()  argument
146 	retval = mutex_lock_interruptible(&udev->mutex);  in uinput_request_send()
150 	if (udev->state != UIST_CREATED) {  in uinput_request_send()
161 	uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id);  in uinput_request_send()
164 	mutex_unlock(&udev->mutex);  in uinput_request_send()
168 static int uinput_request_submit(struct uinput_device *udev,  in uinput_request_submit()  argument
173 	retval = uinput_request_reserve_slot(udev, request);  in uinput_request_submit()
177 	retval = uinput_request_send(udev, request);  in uinput_request_submit()
189 	uinput_request_release_slot(udev, request->id);  in uinput_request_submit()
197 static void uinput_flush_requests(struct uinput_device *udev)  in uinput_flush_requests()  argument
202 	spin_lock(&udev->requests_lock);  in uinput_flush_requests()
205 		request = udev->requests[i];  in uinput_flush_requests()
212 	spin_unlock(&udev->requests_lock);  in uinput_flush_requests()
234 	struct uinput_device *udev = input_get_drvdata(dev);  in uinput_dev_upload_effect()  local
252 	return uinput_request_submit(udev, &request);  in uinput_dev_upload_effect()
257 	struct uinput_device *udev = input_get_drvdata(dev);  in uinput_dev_erase_effect()  local
266 	return uinput_request_submit(udev, &request);  in uinput_dev_erase_effect()
281 static void uinput_destroy_device(struct uinput_device *udev)  in uinput_destroy_device()  argument
284 	struct input_dev *dev = udev->dev;  in uinput_destroy_device()
285 	enum uinput_state old_state = udev->state;  in uinput_destroy_device()
287 	udev->state = UIST_NEW_DEVICE;  in uinput_destroy_device()
293 			uinput_flush_requests(udev);  in uinput_destroy_device()
300 		udev->dev = NULL;  in uinput_destroy_device()
304 static int uinput_create_device(struct uinput_device *udev)  in uinput_create_device()  argument
306 	struct input_dev *dev = udev->dev;  in uinput_create_device()
309 	if (udev->state != UIST_SETUP_COMPLETE) {  in uinput_create_device()
331 	if (test_bit(EV_FF, dev->evbit) && !udev->ff_effects_max) {  in uinput_create_device()
338 	if (udev->ff_effects_max) {  in uinput_create_device()
339 		error = input_ff_create(dev, udev->ff_effects_max);  in uinput_create_device()
358 	input_set_drvdata(udev->dev, udev);  in uinput_create_device()
360 	error = input_register_device(udev->dev);  in uinput_create_device()
364 	udev->state = UIST_CREATED;  in uinput_create_device()
369  fail1: uinput_destroy_device(udev);  in uinput_create_device()
442 static int uinput_dev_setup(struct uinput_device *udev,  in uinput_dev_setup()  argument
448 	if (udev->state == UIST_CREATED)  in uinput_dev_setup()
457 	dev = udev->dev;  in uinput_dev_setup()
459 	udev->ff_effects_max = setup.ff_effects_max;  in uinput_dev_setup()
466 	udev->state = UIST_SETUP_COMPLETE;  in uinput_dev_setup()
470 static int uinput_abs_setup(struct uinput_device *udev,  in uinput_abs_setup()  argument
480 	if (udev->state == UIST_CREATED)  in uinput_abs_setup()
489 	dev = udev->dev;  in uinput_abs_setup()
505 static int uinput_setup_device_legacy(struct uinput_device *udev,  in uinput_setup_device_legacy()  argument
516 	if (!udev->dev) {  in uinput_setup_device_legacy()
517 		udev->dev = input_allocate_device();  in uinput_setup_device_legacy()
518 		if (!udev->dev)  in uinput_setup_device_legacy()
522 	dev = udev->dev;  in uinput_setup_device_legacy()
528 	udev->ff_effects_max = user_dev->ff_effects_max;  in uinput_setup_device_legacy()
560 	udev->state = UIST_SETUP_COMPLETE;  in uinput_setup_device_legacy()
568 static ssize_t uinput_inject_events(struct uinput_device *udev,  in uinput_inject_events()  argument
587 		input_event(udev->dev, ev.type, ev.code, ev.value);  in uinput_inject_events()
598 	struct uinput_device *udev = file->private_data;  in uinput_write()  local
604 	retval = mutex_lock_interruptible(&udev->mutex);  in uinput_write()
608 	retval = udev->state == UIST_CREATED ?  in uinput_write()
609 			uinput_inject_events(udev, buffer, count) :  in uinput_write()
610 			uinput_setup_device_legacy(udev, buffer, count);  in uinput_write()
612 	mutex_unlock(&udev->mutex);  in uinput_write()
617 static bool uinput_fetch_next_event(struct uinput_device *udev,  in uinput_fetch_next_event()  argument
622 	spin_lock_irq(&udev->dev->event_lock);  in uinput_fetch_next_event()
624 	have_event = udev->head != udev->tail;  in uinput_fetch_next_event()
626 		*event = udev->buff[udev->tail];  in uinput_fetch_next_event()
627 		udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;  in uinput_fetch_next_event()
630 	spin_unlock_irq(&udev->dev->event_lock);  in uinput_fetch_next_event()
635 static ssize_t uinput_events_to_user(struct uinput_device *udev,  in uinput_events_to_user()  argument
642 	       uinput_fetch_next_event(udev, &event)) {  in uinput_events_to_user()
656 	struct uinput_device *udev = file->private_data;  in uinput_read()  local
663 		retval = mutex_lock_interruptible(&udev->mutex);  in uinput_read()
667 		if (udev->state != UIST_CREATED)  in uinput_read()
669 		else if (udev->head == udev->tail &&  in uinput_read()
673 			retval = uinput_events_to_user(udev, buffer, count);  in uinput_read()
675 		mutex_unlock(&udev->mutex);  in uinput_read()
681 			retval = wait_event_interruptible(udev->waitq,  in uinput_read()
682 						  udev->head != udev->tail ||  in uinput_read()
683 						  udev->state != UIST_CREATED);  in uinput_read()
691 	struct uinput_device *udev = file->private_data;  in uinput_poll()  local
693 	poll_wait(file, &udev->waitq, wait);  in uinput_poll()
695 	if (udev->head != udev->tail)  in uinput_poll()
703 	struct uinput_device *udev = file->private_data;  in uinput_release()  local
705 	uinput_destroy_device(udev);  in uinput_release()
706 	kfree(udev);  in uinput_release()
801 	if (udev->state == UIST_CREATED)		\
805 	else set_bit((_arg), udev->dev->_bit);		\
838 	struct uinput_device	*udev = file->private_data;  in uinput_ioctl_handler()  local
846 	retval = mutex_lock_interruptible(&udev->mutex);  in uinput_ioctl_handler()
850 	if (!udev->dev) {  in uinput_ioctl_handler()
851 		udev->dev = input_allocate_device();  in uinput_ioctl_handler()
852 		if (!udev->dev) {  in uinput_ioctl_handler()
865 		retval = uinput_create_device(udev);  in uinput_ioctl_handler()
869 		uinput_destroy_device(udev);  in uinput_ioctl_handler()
873 		retval = uinput_dev_setup(udev, p);  in uinput_ioctl_handler()
919 		if (udev->state == UIST_CREATED) {  in uinput_ioctl_handler()
930 		kfree(udev->dev->phys);  in uinput_ioctl_handler()
931 		udev->dev->phys = phys;  in uinput_ioctl_handler()
939 		req = uinput_request_find(udev, ff_up.request_id);  in uinput_ioctl_handler()
962 		req = uinput_request_find(udev, ff_erase.request_id);  in uinput_ioctl_handler()
982 		req = uinput_request_find(udev, ff_up.request_id);  in uinput_ioctl_handler()
999 		req = uinput_request_find(udev, ff_erase.request_id);  in uinput_ioctl_handler()
1015 		if (udev->state != UIST_CREATED) {  in uinput_ioctl_handler()
1019 		name = dev_name(&udev->dev->dev);  in uinput_ioctl_handler()
1024 		retval = uinput_abs_setup(udev, p, size);  in uinput_ioctl_handler()
1030 	mutex_unlock(&udev->mutex);  in uinput_ioctl_handler()