Kernel/PCI: Move the PCI components as a subfolder to the Bus directory

Author: https://github.com/supercomputer7
Commit: 6568bb47cb
Pull-request: https://github.com/SerenityOS/serenity/pull/8241
Issue: https://github.com/SerenityOS/serenity/issues/6948
Issue: https://github.com/SerenityOS/serenity/issues/7445
Issue: https://github.com/SerenityOS/serenity/issues/8331
Reviewed-by: https://github.com/IdanHo
Reviewed-by: https://github.com/awesomekling

Kernel/Bus/PCI/DeviceController.cpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/Bus/PCI/DeviceController.h>
+
+namespace Kernel {
+namespace PCI {
+
+DeviceController::DeviceController(Address address)
+    : m_pci_address(address)
+{
+}
+
+bool DeviceController::is_msi_capable() const
+{
+    for (auto capability : PCI::get_physical_id(pci_address()).capabilities()) {
+        if (capability.id() == PCI_CAPABILITY_MSI)
+            return true;
+    }
+    return false;
+}
+bool DeviceController::is_msix_capable() const
+{
+    for (auto capability : PCI::get_physical_id(pci_address()).capabilities()) {
+        if (capability.id() == PCI_CAPABILITY_MSIX)
+            return true;
+    }
+    return false;
+}
+
+void DeviceController::enable_pin_based_interrupts() const
+{
+    PCI::enable_interrupt_line(pci_address());
+}
+void DeviceController::disable_pin_based_interrupts() const
+{
+    PCI::disable_interrupt_line(pci_address());
+}
+
+void DeviceController::enable_message_signalled_interrupts()
+{
+    TODO();
+}
+void DeviceController::disable_message_signalled_interrupts()
+{
+    TODO();
+}
+void DeviceController::enable_extended_message_signalled_interrupts()
+{
+    TODO();
+}
+void DeviceController::disable_extended_message_signalled_interrupts()
+{
+    TODO();
+}
+
+}
+}