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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DistinctNumeric.h>
#include <AK/IntrusiveList.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
#include <Kernel/Locking/SpinlockProtected.h>
namespace Kernel::Graphics::VirtIOGPU {
enum class VirGLCommand : u32 {
NOP = 0,
CREATE_OBJECT = 1,
BIND_OBJECT,
DESTROY_OBJECT,
SET_VIEWPORT_STATE,
SET_FRAMEBUFFER_STATE,
SET_VERTEX_BUFFERS,
CLEAR,
DRAW_VBO,
RESOURCE_INLINE_WRITE,
SET_SAMPLER_VIEWS,
SET_INDEX_BUFFER,
SET_CONSTANT_BUFFER,
SET_STENCIL_REF,
SET_BLEND_COLOR,
SET_SCISSOR_STATE,
BLIT,
RESOURCE_COPY_REGION,
BIND_SAMPLER_STATES,
BEGIN_QUERY,
END_QUERY,
GET_QUERY_RESULT,
SET_POLYGON_STIPPLE,
SET_CLIP_STATE,
SET_SAMPLE_MASK,
SET_STREAMOUT_TARGETS,
SET_RENDER_CONDITION,
SET_UNIFORM_BUFFER,
SET_SUB_CTX,
CREATE_SUB_CTX,
DESTROY_SUB_CTX,
BIND_SHADER,
SET_TESS_STATE,
SET_MIN_SAMPLES,
SET_SHADER_BUFFERS,
SET_SHADER_IMAGES,
MEMORY_BARRIER,
LAUNCH_GRID,
SET_FRAMEBUFFER_STATE_NO_ATTACH,
TEXTURE_BARRIER,
SET_ATOMIC_BUFFERS,
SET_DBG_FLAGS,
GET_QUERY_RESULT_QBO,
TRANSFER3D,
END_TRANSFERS,
COPY_TRANSFER3D,
SET_TWEAKS,
CLEAR_TEXTURE,
PIPE_RESOURCE_CREATE,
PIPE_RESOURCE_SET_TYPE,
GET_MEMORY_INFO,
SEND_STRING_MARKER,
MAX_COMMANDS
};
union ClearType {
struct {
u32 depth : 1;
u32 stencil : 1;
u32 color0 : 1;
u32 color1 : 1;
u32 color2 : 1;
u32 color3 : 1;
u32 color4 : 1;
u32 color5 : 1;
u32 color6 : 1;
u32 color7 : 1;
} flags;
u32 value;
};
}
namespace Kernel {
class VirtIOGraphicsAdapter;
class VirtIOGPU3DDevice : public CharacterDevice {
friend class DeviceManagement;
public:
static ErrorOr<NonnullLockRefPtr<VirtIOGPU3DDevice>> try_create(VirtIOGraphicsAdapter&);
private:
VirtIOGPU3DDevice(VirtIOGraphicsAdapter const& graphics_adapter, NonnullOwnPtr<Memory::Region> transfer_buffer_region, Graphics::VirtIOGPU::ContextID kernel_context_id);
class PerContextState final : public AtomicRefCounted<PerContextState> {
friend class VirtIOGPU3DDevice;
public:
static ErrorOr<NonnullRefPtr<PerContextState>> try_create(OpenFileDescription& description, Graphics::VirtIOGPU::ContextID context_id)
{
auto region_result = TRY(MM.allocate_kernel_region(
NUM_TRANSFER_REGION_PAGES * PAGE_SIZE,
"VIRGL3D userspace upload buffer"sv,
Memory::Region::Access::ReadWrite,
AllocationStrategy::AllocateNow));
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) PerContextState(description, context_id, move(region_result))));
}
Graphics::VirtIOGPU::ContextID context_id() { return m_context_id; }
Memory::Region& transfer_buffer_region() { return *m_transfer_buffer_region; }
OpenFileDescription& description() { return m_attached_file_description; }
private:
PerContextState() = delete;
PerContextState(OpenFileDescription&, Graphics::VirtIOGPU::ContextID context_id, OwnPtr<Memory::Region> transfer_buffer_region);
Graphics::VirtIOGPU::ContextID m_context_id;
OwnPtr<Memory::Region> m_transfer_buffer_region;
// NOTE: We clean this whole object when the file description is closed, therefore we need to hold
// a raw reference here instead of a strong reference pointer (e.g. RefPtr, which will make it
// possible to leak the attached OpenFileDescription for a context in this device).
OpenFileDescription& m_attached_file_description;
IntrusiveListNode<PerContextState, NonnullRefPtr<PerContextState>> m_list_node;
};
virtual bool can_read(OpenFileDescription const&, u64) const override { return true; }
virtual bool can_write(OpenFileDescription const&, u64) const override { return true; }
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return ENOTSUP; }
virtual StringView class_name() const override { return "virgl3d"sv; }
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
virtual void detach(OpenFileDescription&) override;
using ContextList = IntrusiveListRelaxedConst<&PerContextState::m_list_node>;
private:
NonnullLockRefPtr<VirtIOGraphicsAdapter> m_graphics_adapter;
// Context used for kernel operations (e.g. flushing resources to scanout)
Graphics::VirtIOGPU::ContextID m_kernel_context_id;
SpinlockProtected<ContextList, LockRank::None> m_context_state_list;
// Memory management for backing buffers
NonnullOwnPtr<Memory::Region> m_transfer_buffer_region;
constexpr static size_t NUM_TRANSFER_REGION_PAGES = 1024;
};
}
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