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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Devices/HID/VMWareMouseDevice.h>
#include <Kernel/Devices/VMWareBackdoor.h>
#include <Kernel/Sections.h>
namespace Kernel {
UNMAP_AFTER_INIT RefPtr<VMWareMouseDevice> VMWareMouseDevice::try_to_initialize(const I8042Controller& ps2_controller)
{
if (!VMWareBackdoor::the())
return {};
if (!VMWareBackdoor::the()->vmmouse_is_absolute())
return {};
auto device = adopt_ref(*new VMWareMouseDevice(ps2_controller));
if (device->initialize())
return device;
return {};
}
void VMWareMouseDevice::irq_handle_byte_read(u8)
{
VERIFY(VMWareBackdoor::the());
VERIFY(VMWareBackdoor::the()->vmmouse_is_absolute());
// We won't receive complete packets with the backdoor enabled,
// we will only get one byte for each event, which we'll just
// discard. If we were to wait until we *think* that we got a
// full PS/2 packet then we would create a backlog in the VM
// because we wouldn't read the appropriate number of mouse
// packets from VMWareBackdoor.
auto mouse_packet = VMWareBackdoor::the()->receive_mouse_packet();
if (mouse_packet.has_value()) {
m_entropy_source.add_random_event(mouse_packet.value());
{
SpinlockLocker lock(m_queue_lock);
m_queue.enqueue(mouse_packet.value());
}
evaluate_block_conditions();
}
return;
}
VMWareMouseDevice::VMWareMouseDevice(const I8042Controller& ps2_controller)
: PS2MouseDevice(ps2_controller)
{
}
VMWareMouseDevice::~VMWareMouseDevice()
{
}
}
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