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.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+#include <Kernel/Bus/PCI/Definitions.h>
+
+namespace Kernel {
+class PCI::DeviceController {
+public:
+    Address pci_address() const { return m_pci_address; };
+
+    virtual ~DeviceController() = default;
+    void enable_pin_based_interrupts() const;
+    void disable_pin_based_interrupts() const;
+
+    bool is_msi_capable() const;
+    bool is_msix_capable() const;
+
+    void enable_message_signalled_interrupts();
+    void disable_message_signalled_interrupts();
+
+    void enable_extended_message_signalled_interrupts();
+    void disable_extended_message_signalled_interrupts();
+
+protected:
+    explicit DeviceController(Address pci_address);
+
+private:
+    Address m_pci_address;
+};
+}