mirror of
https://github.com/RGBCube/serenity
synced 2025-05-22 18:45:08 +00:00
21b6d84ff0
These methods are no longer needed because SystemServer is able to populate the DevFS on its own. Device absolute_path no longer assume a path to the /dev location, because it really should not assume any path to a Device node. Because StorageManagement still needs to know the storage name, we declare a virtual method only for StorageDevices to override, but this technique should really be removed later on.
96 lines
3.5 KiB
C++
96 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Kernel/Bus/VirtIO/Device.h>
|
|
#include <Kernel/Bus/VirtIO/Queue.h>
|
|
#include <Kernel/Devices/BlockDevice.h>
|
|
#include <Kernel/Graphics/VirtIOGPU/GPU.h>
|
|
|
|
namespace Kernel::Graphics::VirtIOGPU {
|
|
|
|
class FrameBufferDevice final : public BlockDevice {
|
|
friend class Console;
|
|
struct Buffer {
|
|
size_t framebuffer_offset { 0 };
|
|
u8* framebuffer_data { nullptr };
|
|
Protocol::Rect dirty_rect {};
|
|
ResourceID resource_id { 0 };
|
|
};
|
|
|
|
public:
|
|
FrameBufferDevice(VirtIOGPU::GPU& virtio_gpu, ScanoutID);
|
|
virtual ~FrameBufferDevice() override;
|
|
|
|
virtual void deactivate_writes();
|
|
virtual void activate_writes();
|
|
|
|
bool try_to_set_resolution(size_t width, size_t height);
|
|
void clear_to_black(Buffer&);
|
|
|
|
size_t width() const { return display_info().rect.width; }
|
|
size_t height() const { return display_info().rect.height; }
|
|
size_t pitch() const { return display_info().rect.width * 4; }
|
|
|
|
static size_t calculate_framebuffer_size(size_t width, size_t height)
|
|
{
|
|
// VirtIO resources can only map on page boundaries!
|
|
return Memory::page_round_up(sizeof(u32) * width * height);
|
|
}
|
|
|
|
void flush_dirty_window(Protocol::Rect const&, Buffer&);
|
|
void transfer_framebuffer_data_to_host(Protocol::Rect const&, Buffer&);
|
|
void flush_displayed_image(Protocol::Rect const&, Buffer&);
|
|
|
|
void draw_ntsc_test_pattern(Buffer&);
|
|
|
|
u8* framebuffer_data();
|
|
|
|
private:
|
|
virtual StringView class_name() const override { return "VirtIOFrameBuffer"; }
|
|
|
|
Protocol::DisplayInfoResponse::Display const& display_info() const;
|
|
Protocol::DisplayInfoResponse::Display& display_info();
|
|
|
|
KResult create_framebuffer();
|
|
void create_buffer(Buffer&, size_t, size_t);
|
|
void set_buffer(int);
|
|
|
|
virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
|
|
virtual KResultOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
|
|
virtual bool can_read(const OpenFileDescription&, size_t) const override { return true; }
|
|
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
|
|
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
|
|
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; };
|
|
virtual void start_request(AsyncBlockDeviceRequest& request) override { request.complete(AsyncDeviceRequest::Failure); }
|
|
|
|
static bool is_valid_buffer_index(int buffer_index)
|
|
{
|
|
return buffer_index == 0 || buffer_index == 1;
|
|
}
|
|
|
|
Buffer& buffer_from_index(int buffer_index)
|
|
{
|
|
return buffer_index == 0 ? m_main_buffer : m_back_buffer;
|
|
}
|
|
Buffer& current_buffer() const { return *m_current_buffer; }
|
|
|
|
GPU& m_gpu;
|
|
const ScanoutID m_scanout;
|
|
Buffer* m_current_buffer { nullptr };
|
|
Atomic<int, AK::memory_order_relaxed> m_last_set_buffer_index { 0 };
|
|
Buffer m_main_buffer;
|
|
Buffer m_back_buffer;
|
|
OwnPtr<Memory::Region> m_framebuffer;
|
|
RefPtr<Memory::VMObject> m_framebuffer_sink_vmobject;
|
|
size_t m_buffer_size { 0 };
|
|
bool m_are_writes_active { true };
|
|
// FIXME: This needs to be cleaned up if the WindowServer exits while we are in a tty
|
|
WeakPtr<Memory::Region> m_userspace_mmap_region;
|
|
};
|
|
|
|
}
|