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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/BinaryBufferWriter.h>
#include <AK/DistinctNumeric.h>
#include <Kernel/Bus/VirtIO/Device.h>
#include <Kernel/Bus/VirtIO/Queue.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
namespace Kernel {
#define VIRTIO_GPU_F_VIRGL (1 << 0)
#define VIRTIO_GPU_F_EDID (1 << 1)
#define VIRTIO_GPU_FLAG_FENCE (1 << 0)
#define CONTROLQ 0
#define CURSORQ 1
#define MAX_VIRTIOGPU_RESOLUTION_WIDTH 3840
#define MAX_VIRTIOGPU_RESOLUTION_HEIGHT 2160
#define VIRTIO_GPU_EVENT_DISPLAY (1 << 0)
class VirtIODisplayConnector;
class VirtIOGPU3DDevice;
class VirtIOGraphicsAdapter final
: public GenericGraphicsAdapter
, public VirtIO::Device {
friend class VirtIODisplayConnector;
friend class VirtIOGPU3DDevice;
public:
static NonnullLockRefPtr<VirtIOGraphicsAdapter> initialize(PCI::DeviceIdentifier const&);
virtual void initialize() override;
void initialize_3d_device();
ErrorOr<void> mode_set_resolution(Badge<VirtIODisplayConnector>, VirtIODisplayConnector&, size_t width, size_t height);
void set_dirty_displayed_rect(Badge<VirtIODisplayConnector>, VirtIODisplayConnector&, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
void flush_displayed_image(Badge<VirtIODisplayConnector>, VirtIODisplayConnector&, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
void transfer_framebuffer_data_to_host(Badge<VirtIODisplayConnector>, VirtIODisplayConnector&, Graphics::VirtIOGPU::Protocol::Rect const& rect, bool main_buffer);
private:
ErrorOr<void> attach_physical_range_to_framebuffer(VirtIODisplayConnector& connector, bool main_buffer, size_t framebuffer_offset, size_t framebuffer_size);
void flush_dirty_rectangle(Graphics::VirtIOGPU::ScanoutID, Graphics::VirtIOGPU::ResourceID, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect);
struct Scanout {
struct PhysicalBuffer {
size_t framebuffer_offset { 0 };
Graphics::VirtIOGPU::Protocol::Rect dirty_rect {};
Graphics::VirtIOGPU::ResourceID resource_id { 0 };
};
LockRefPtr<VirtIODisplayConnector> display_connector;
PhysicalBuffer main_buffer;
PhysicalBuffer back_buffer;
};
VirtIOGraphicsAdapter(PCI::DeviceIdentifier const&, NonnullOwnPtr<Memory::Region> scratch_space_region);
ErrorOr<void> initialize_adapter();
virtual bool handle_device_config_change() override;
virtual void handle_queue_update(u16 queue_index) override;
u32 get_pending_events();
void clear_pending_events(u32 event_bitmask);
// 2D framebuffer stuff
static ErrorOr<FlatPtr> 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);
}
// 3D Command stuff
Graphics::VirtIOGPU::ContextID create_context();
void attach_resource_to_context(Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::ContextID context_id);
void submit_command_buffer(Graphics::VirtIOGPU::ContextID, Function<size_t(Bytes)> buffer_writer);
Graphics::VirtIOGPU::Protocol::TextureFormat get_framebuffer_format() const { return Graphics::VirtIOGPU::Protocol::TextureFormat::VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM; }
auto& operation_lock() { return m_operation_lock; }
Graphics::VirtIOGPU::ResourceID allocate_resource_id();
Graphics::VirtIOGPU::ContextID allocate_context_id();
PhysicalAddress start_of_scratch_space() const { return m_scratch_space->physical_page(0)->paddr(); }
AK::BinaryBufferWriter create_scratchspace_writer()
{
return { Bytes(m_scratch_space->vaddr().as_ptr(), m_scratch_space->size()) };
}
void synchronous_virtio_gpu_command(PhysicalAddress buffer_start, size_t request_size, size_t response_size);
void populate_virtio_gpu_request_header(Graphics::VirtIOGPU::Protocol::ControlHeader& header, Graphics::VirtIOGPU::Protocol::CommandType ctrl_type, u32 flags = 0);
Graphics::VirtIOGPU::ResourceID create_2d_resource(Graphics::VirtIOGPU::Protocol::Rect rect);
Graphics::VirtIOGPU::ResourceID create_3d_resource(Graphics::VirtIOGPU::Protocol::Resource3DSpecification const& resource_3d_specification);
void delete_resource(Graphics::VirtIOGPU::ResourceID resource_id);
void ensure_backing_storage(Graphics::VirtIOGPU::ResourceID resource_id, Memory::Region const& region, size_t buffer_offset, size_t buffer_length);
void detach_backing_storage(Graphics::VirtIOGPU::ResourceID resource_id);
void set_scanout_resource(Graphics::VirtIOGPU::ScanoutID scanout, Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect rect);
void transfer_framebuffer_data_to_host(Graphics::VirtIOGPU::ScanoutID scanout, Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect const& rect);
void flush_displayed_image(Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect);
ErrorOr<void> query_and_set_edid(u32 scanout_id, VirtIODisplayConnector& display_connector);
size_t m_num_scanouts { 0 };
Scanout m_scanouts[VIRTIO_GPU_MAX_SCANOUTS];
VirtIO::Configuration const* m_device_configuration { nullptr };
// Note: Resource ID 0 is invalid, and we must not allocate 0 as the first resource ID.
Atomic<u32> m_resource_id_counter { 1 };
Atomic<u32> m_context_id_counter { 1 };
LockRefPtr<VirtIOGPU3DDevice> m_3d_device;
bool m_has_virgl_support { false };
// Synchronous commands
WaitQueue m_outstanding_request;
Spinlock m_operation_lock { LockRank::None };
NonnullOwnPtr<Memory::Region> m_scratch_space;
};
}
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