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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <span>
#include <vector>
#include <queue>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/scratch_buffer.h"
#include "video_core/engines/engine_interface.h"
#include "video_core/engines/puller.h"
namespace Core {
class System;
}
namespace Tegra {
namespace Control {
struct ChannelState;
}
class GPU;
class MemoryManager;
enum class SubmissionMode : u32 {
IncreasingOld = 0,
Increasing = 1,
NonIncreasingOld = 2,
NonIncreasing = 3,
Inline = 4,
IncreaseOnce = 5
};
// Note that, traditionally, methods are treated as 4-byte addressable locations, and hence
// their numbers are written down multiplied by 4 in Docs. Here we are not multiply by 4.
// So the values you see in docs might be multiplied by 4.
// Register documentation:
// https://github.com/NVIDIA/open-gpu-doc/blob/ab27fc22db5de0d02a4cabe08e555663b62db4d4/classes/host/cla26f.h
//
// Register Description (approx):
// https://github.com/NVIDIA/open-gpu-doc/blob/ab27fc22db5de0d02a4cabe08e555663b62db4d4/manuals/volta/gv100/dev_pbdma.ref.txt
enum class BufferMethods : u32 {
BindObject = 0x0,
Illegal = 0x1,
Nop = 0x2,
SemaphoreAddressHigh = 0x4,
SemaphoreAddressLow = 0x5,
SemaphoreSequencePayload = 0x6,
SemaphoreOperation = 0x7,
NonStallInterrupt = 0x8,
WrcacheFlush = 0x9,
MemOpA = 0xA,
MemOpB = 0xB,
MemOpC = 0xC,
MemOpD = 0xD,
RefCnt = 0x14,
SemaphoreAcquire = 0x1A,
SemaphoreRelease = 0x1B,
SyncpointPayload = 0x1C,
SyncpointOperation = 0x1D,
WaitForIdle = 0x1E,
CRCCheck = 0x1F,
Yield = 0x20,
NonPullerMethods = 0x40,
};
struct CommandListHeader {
union {
u64 raw;
BitField<0, 40, GPUVAddr> addr;
BitField<41, 1, u64> is_non_main;
BitField<42, 21, u64> size;
};
};
static_assert(sizeof(CommandListHeader) == sizeof(u64), "CommandListHeader is incorrect size");
union CommandHeader {
u32 argument;
BitField<0, 13, u32> method;
BitField<0, 24, u32> method_count_;
BitField<13, 3, u32> subchannel;
BitField<16, 13, u32> arg_count;
BitField<16, 13, u32> method_count;
BitField<29, 3, SubmissionMode> mode;
};
static_assert(std::is_standard_layout_v<CommandHeader>, "CommandHeader is not standard layout");
static_assert(sizeof(CommandHeader) == sizeof(u32), "CommandHeader has incorrect size!");
inline CommandHeader BuildCommandHeader(BufferMethods method, u32 arg_count, SubmissionMode mode) {
CommandHeader result{};
result.method.Assign(static_cast<u32>(method));
result.arg_count.Assign(arg_count);
result.mode.Assign(mode);
return result;
}
struct CommandList final {
CommandList() = default;
explicit CommandList(std::size_t size) : command_lists(size) {}
explicit CommandList(std::vector<CommandHeader>&& prefetch_command_list_)
: prefetch_command_list{std::move(prefetch_command_list_)} {}
std::vector<CommandListHeader> command_lists;
std::vector<CommandHeader> prefetch_command_list;
};
/**
* The DmaPusher class implements DMA submission to FIFOs, providing an area of memory that the
* emulated app fills with commands and tells PFIFO to process. The pushbuffers are then assembled
* into a "command stream" consisting of 32-bit words that make up "commands".
* See https://envytools.readthedocs.io/en/latest/hw/fifo/dma-pusher.html#fifo-dma-pusher for
* details on this implementation.
*/
class DmaPusher final {
public:
explicit DmaPusher(Core::System& system_, GPU& gpu_, MemoryManager& memory_manager_,
Control::ChannelState& channel_state_);
~DmaPusher();
void Push(CommandList&& entries) {
dma_pushbuffer.push(std::move(entries));
}
void DispatchCalls();
void BindSubchannel(Engines::EngineInterface* engine, u32 subchannel_id) {
subchannels[subchannel_id] = engine;
}
void BindRasterizer(VideoCore::RasterizerInterface* rasterizer);
private:
static constexpr u32 non_puller_methods = 0x40;
static constexpr u32 max_subchannels = 8;
bool Step();
void ProcessCommands(std::span<const CommandHeader> commands);
void SetState(const CommandHeader& command_header);
void CallMethod(u32 argument) const;
void CallMultiMethod(const u32* base_start, u32 num_methods) const;
Common::ScratchBuffer<CommandHeader>
command_headers; ///< Buffer for list of commands fetched at once
std::queue<CommandList> dma_pushbuffer; ///< Queue of command lists to be processed
std::size_t dma_pushbuffer_subindex{}; ///< Index within a command list within the pushbuffer
struct DmaState {
u32 method; ///< Current method
u32 subchannel; ///< Current subchannel
u32 method_count; ///< Current method count
u32 length_pending; ///< Large NI command length pending
bool non_incrementing; ///< Current command's NI flag
bool is_last_call;
};
DmaState dma_state{};
bool dma_increment_once{};
const bool ib_enable{true}; ///< IB mode enabled
std::array<Engines::EngineInterface*, max_subchannels> subchannels{};
GPU& gpu;
Core::System& system;
MemoryManager& memory_manager;
mutable Engines::Puller puller;
};
} // namespace Tegra
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