Kernel: Introduce a new HID subsystem

The end goal of this commit is to allow to boot on bare metal with no
PS/2 device connected to the system. It turned out that the original
code relied on the existence of the PS/2 keyboard, so VirtualConsole
called it even though ACPI indicated the there's no i8042 controller on
my real machine because I didn't plug any PS/2 device.
The code is much more flexible, so adding HID support for other type of
hardware (e.g. USB HID) could be much simpler.

Briefly describing the change, we have a new singleton called
HIDManagement, which is responsible to initialize the i8042 controller
if exists, and to enumerate its devices. I also abstracted a bit
things, so now every Human interface device is represented with the
HIDDevice class. Then, there are 2 types of it - the MouseDevice and
KeyboardDevice classes; both are responsible to handle the interface in
the DevFS.

PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are
responsible for handling the hardware-specific interface they are
assigned to. Therefore, they are inheriting from the IRQHandler class.

Kernel/Devices/HID/MouseDevice.cpp

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <Kernel/Devices/HID/HIDManagement.h>
+#include <Kernel/Devices/HID/MouseDevice.h>
+
+namespace Kernel {
+
+MouseDevice::MouseDevice()
+    : HIDDevice(10, HIDManagement::the().generate_minor_device_number_for_mouse())
+{
+}
+
+MouseDevice::~MouseDevice()
+{
+}
+
+bool MouseDevice::can_read(const FileDescription&, size_t) const
+{
+    ScopedSpinLock lock(m_queue_lock);
+    return !m_queue.is_empty();
+}
+
+KResultOr<size_t> MouseDevice::read(FileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
+{
+    VERIFY(size > 0);
+    size_t nread = 0;
+    size_t remaining_space_in_buffer = static_cast<size_t>(size) - nread;
+    ScopedSpinLock lock(m_queue_lock);
+    while (!m_queue.is_empty() && remaining_space_in_buffer) {
+        auto packet = m_queue.dequeue();
+        lock.unlock();
+
+        dbgln_if(MOUSE_DEBUG, "Mouse Read: Buttons {:x}", packet.buttons);
+        dbgln_if(MOUSE_DEBUG, "PS2 Mouse: X {}, Y {}, Z {}, Relative {}", packet.x, packet.y, packet.z, packet.buttons);
+        dbgln_if(MOUSE_DEBUG, "PS2 Mouse Read: Filter packets");
+
+        size_t bytes_read_from_packet = min(remaining_space_in_buffer, sizeof(MousePacket));
+        if (!buffer.write(&packet, nread, bytes_read_from_packet))
+            return EFAULT;
+        nread += bytes_read_from_packet;
+        remaining_space_in_buffer -= bytes_read_from_packet;
+
+        lock.lock();
+    }
+    return nread;
+}
+
+KResultOr<size_t> MouseDevice::write(FileDescription&, u64, const UserOrKernelBuffer&, size_t)
+{
+    return 0;
+}
+
+}