RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 20:17:44 +00:00
Code Issues Activity Actions

Kernel: Add VirtIOGPU graphics device

Browse source
This commit is contained in:
Sahan Fernando 2021-06-12 23:07:44 +10:00 • committed by Andreas Kling
parent b569b2df35
commit b9ad6058aa
21 changed files with 1050 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

45
Kernel/Graphics/VirtIOGPU/VirtIOFrameBufferDevice.h Normal file
View file

@ -0,0 +1,45 @@
/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/Graphics/VirtIOGPU/VirtIOGPU.h>
#include <Kernel/VirtIO/VirtIO.h>
#include <Kernel/VirtIO/VirtIOQueue.h>
namespace Kernel::Graphics {
class VirtIOFrameBufferDevice final : public BlockDevice {
public:
VirtIOFrameBufferDevice(RefPtr<VirtIOGPU> virtio_gpu);
virtual ~VirtIOFrameBufferDevice() override;
virtual void deactivate_writes();
virtual void activate_writes();
private:
virtual const char* class_name() const override { return "VirtIOFrameBuffer"; }
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
virtual KResultOr<Region*> mmap(Process&, FileDescription&, const Range&, u64 offset, int prot, bool shared) override;
virtual bool can_read(const FileDescription&, size_t) const override { return true; }
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; };
virtual void start_request(AsyncBlockDeviceRequest& request) override { request.complete(AsyncDeviceRequest::Failure); }
virtual mode_t required_mode() const override { return 0666; }
virtual String device_name() const override { return String::formatted("fb{}", minor()); }
RefPtr<VirtIOGPU> m_gpu;
RefPtr<VMObject> m_framebuffer_sink_vmobject;
bool m_are_writes_active { true };
// FIXME: This needs to be cleaned up if the WindowServer exits while we are in a tty
WeakPtr<Region> m_userspace_mmap_region;
};
}