mirror of
https://github.com/RGBCube/serenity
synced 2025-05-28 19:35:09 +00:00
ad3ae7e0e8
Now that all KResult and KResultOr are used consistently throughout the kernel, it's no longer necessary to return negative error codes. However, we were still doing that in some places, so let's fix all those (bugs) by removing the minuses. :^)
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullOwnPtr.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <Kernel/Devices/BlockDevice.h>
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#include <Kernel/Graphics/GraphicsDevice.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/SpinLock.h>
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#include <Kernel/VM/AnonymousVMObject.h>
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namespace Kernel {
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class FramebufferDevice : public BlockDevice {
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AK_MAKE_ETERNAL
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public:
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static NonnullRefPtr<FramebufferDevice> create(const GraphicsDevice&, size_t, PhysicalAddress, size_t, size_t, size_t);
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virtual KResult ioctl(FileDescription&, unsigned request, Userspace<void*> arg) override;
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virtual KResultOr<Region*> mmap(Process&, FileDescription&, const Range&, u64 offset, int prot, bool shared) override;
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// ^Device
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virtual mode_t required_mode() const override { return 0660; }
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virtual String device_name() const override;
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virtual void deactivate_writes();
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virtual void activate_writes();
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size_t framebuffer_size_in_bytes() const;
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virtual ~FramebufferDevice() {};
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void initialize();
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private:
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// ^File
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virtual StringView class_name() const override { return "FramebufferDevice"; }
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virtual bool can_read(const FileDescription&, size_t) const override final { return true; }
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virtual bool can_write(const FileDescription&, size_t) const override final { return true; }
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virtual void start_request(AsyncBlockDeviceRequest& request) override final { request.complete(AsyncDeviceRequest::Failure); }
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virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
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virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
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FramebufferDevice(const GraphicsDevice&, size_t, PhysicalAddress, size_t, size_t, size_t);
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PhysicalAddress m_framebuffer_address;
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size_t m_framebuffer_pitch { 0 };
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size_t m_framebuffer_width { 0 };
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size_t m_framebuffer_height { 0 };
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SpinLock<u8> m_activation_lock;
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RefPtr<AnonymousVMObject> m_real_framebuffer_vmobject;
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RefPtr<AnonymousVMObject> m_swapped_framebuffer_vmobject;
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OwnPtr<Region> m_real_framebuffer_region;
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OwnPtr<Region> m_swapped_framebuffer_region;
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bool m_graphical_writes_enabled { true };
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RefPtr<AnonymousVMObject> m_userspace_real_framebuffer_vmobject;
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Region* m_userspace_framebuffer_region { nullptr };
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size_t m_y_offset { 0 };
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size_t m_output_port_index;
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NonnullRefPtr<GraphicsDevice> m_graphics_adapter;
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};
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}
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