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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/Graphics/GraphicsDevice.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/SpinLock.h>
#include <Kernel/VM/AnonymousVMObject.h>
namespace Kernel {
class FramebufferDevice : public BlockDevice {
AK_MAKE_ETERNAL
public:
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
virtual KResultOr<Region*> mmap(Process&, FileDescription&, const Range&, u64 offset, int prot, bool shared) override;
// ^Device
virtual mode_t required_mode() const override { return 0660; }
virtual String device_name() const override;
virtual void deactivate_writes();
virtual void activate_writes();
virtual size_t framebuffer_size_in_bytes() const { return m_framebuffer_pitch * m_framebuffer_height; }
virtual ~FramebufferDevice() {};
void initialize();
protected:
virtual bool set_resolution(size_t framebuffer_width, size_t framebuffer_height, size_t framebuffer_pitch);
FramebufferDevice(PhysicalAddress, size_t, size_t, size_t);
virtual bool can_read(const FileDescription&, size_t) const override final { return true; }
virtual bool can_write(const FileDescription&, size_t) const override final { return true; }
virtual void start_request(AsyncBlockDeviceRequest& request) override final { request.complete(AsyncDeviceRequest::Failure); }
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return -EINVAL; }
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return -EINVAL; }
protected:
PhysicalAddress m_framebuffer_address;
size_t m_framebuffer_pitch { 0 };
size_t m_framebuffer_width { 0 };
size_t m_framebuffer_height { 0 };
private:
SpinLock<u8> m_activation_lock;
RefPtr<AnonymousVMObject> m_real_framebuffer_vmobject;
RefPtr<AnonymousVMObject> m_swapped_framebuffer_vmobject;
OwnPtr<Region> m_real_framebuffer_region;
OwnPtr<Region> m_swapped_framebuffer_region;
bool m_graphical_writes_enabled { true };
RefPtr<AnonymousVMObject> m_userspace_real_framebuffer_vmobject;
Region* m_userspace_framebuffer_region { nullptr };
};
}
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