mirror of
https://github.com/ryujinx-mirror/ryujinx.git
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4738113f29
* chore : disable unwanted warnings and minor code cleanup * chore : remove more warnings * fix : reorder struct correctly * fix : restore _isKernel and remove useless comment * fix : copy/paste error * fix : restore CallMethod call * fix : whitespace * chore : clean using * feat : remove warnings * fix : simplify warning removal on struct * fix : revert fields deletion and code clean up * fix : re-add RE value * fix : typo
316 lines
No EOL
9.5 KiB
C#
316 lines
No EOL
9.5 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Runtime.InteropServices;
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using System.Threading;
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namespace Ryujinx.Graphics.Gpu
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{
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/// <summary>
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/// GPU DMA pusher, used to push commands to the GPU.
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/// </summary>
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public class DmaPusher
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{
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private ConcurrentQueue<CommandBuffer> _commandBufferQueue;
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private enum CommandBufferType
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{
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Prefetch,
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NoPrefetch,
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}
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private struct CommandBuffer
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{
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/// <summary>
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/// The type of the command buffer.
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/// </summary>
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public CommandBufferType Type;
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/// <summary>
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/// Fetched data.
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/// </summary>
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public int[] Words;
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/// <summary>
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/// The GPFIFO entry address. (used in NoPrefetch mode)
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/// </summary>
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public ulong EntryAddress;
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/// <summary>
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/// The count of entries inside this GPFIFO entry.
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/// </summary>
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public uint EntryCount;
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/// <summary>
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/// Fetch the command buffer.
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/// </summary>
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public void Fetch(GpuContext context)
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{
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if (Words == null)
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{
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Words = MemoryMarshal.Cast<byte, int>(context.MemoryAccessor.GetSpan(EntryAddress, EntryCount * 4)).ToArray();
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}
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}
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/// <summary>
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/// Read inside the command buffer.
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/// </summary>
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/// <param name="context">The GPU context</param>
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/// <param name="index">The index inside the command buffer</param>
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/// <returns>The value read</returns>
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public int ReadAt(GpuContext context, int index)
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{
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return Words[index];
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}
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}
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private CommandBuffer _currentCommandBuffer;
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private int _wordsPosition;
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/// <summary>
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/// Internal GPFIFO state.
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/// </summary>
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private struct DmaState
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{
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public int Method;
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public int SubChannel;
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public int MethodCount;
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public bool NonIncrementing;
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public bool IncrementOnce;
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public int LengthPending;
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}
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private DmaState _state;
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private bool _ibEnable;
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private GpuContext _context;
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private AutoResetEvent _event;
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/// <summary>
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/// Creates a new instance of the GPU DMA pusher.
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/// </summary>
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/// <param name="context">GPU context that the pusher belongs to</param>
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internal DmaPusher(GpuContext context)
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{
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_context = context;
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_ibEnable = true;
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_commandBufferQueue = new ConcurrentQueue<CommandBuffer>();
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_event = new AutoResetEvent(false);
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}
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/// <summary>
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/// Signal the pusher that there are new entries to process.
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/// </summary>
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public void SignalNewEntries()
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{
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_event.Set();
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}
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/// <summary>
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/// Push a GPFIFO entry in the form of a prefetched command buffer.
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/// It is intended to be used by nvservices to handle special cases.
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/// </summary>
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/// <param name="commandBuffer">The command buffer containing the prefetched commands</param>
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public void PushHostCommandBuffer(int[] commandBuffer)
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{
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_commandBufferQueue.Enqueue(new CommandBuffer
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{
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Type = CommandBufferType.Prefetch,
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Words = commandBuffer,
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EntryAddress = ulong.MaxValue,
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EntryCount = (uint)commandBuffer.Length
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});
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}
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/// <summary>
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/// Create a CommandBuffer from a GPFIFO entry.
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/// </summary>
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/// <param name="entry">The GPFIFO entry</param>
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/// <returns>A new CommandBuffer based on the GPFIFO entry</returns>
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private CommandBuffer CreateCommandBuffer(ulong entry)
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{
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ulong length = (entry >> 42) & 0x1fffff;
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ulong startAddress = entry & 0xfffffffffc;
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bool noPrefetch = (entry & (1UL << 63)) != 0;
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CommandBufferType type = CommandBufferType.Prefetch;
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if (noPrefetch)
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{
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type = CommandBufferType.NoPrefetch;
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}
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return new CommandBuffer
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{
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Type = type,
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Words = null,
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EntryAddress = startAddress,
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EntryCount = (uint)length
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};
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}
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/// <summary>
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/// Pushes GPFIFO entries.
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/// </summary>
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/// <param name="entries">GPFIFO entries</param>
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public void PushEntries(ReadOnlySpan<ulong> entries)
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{
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bool beforeBarrier = true;
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foreach (ulong entry in entries)
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{
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CommandBuffer commandBuffer = CreateCommandBuffer(entry);
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if (beforeBarrier && commandBuffer.Type == CommandBufferType.Prefetch)
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{
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commandBuffer.Fetch(_context);
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}
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if (commandBuffer.Type == CommandBufferType.NoPrefetch)
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{
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beforeBarrier = false;
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}
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_commandBufferQueue.Enqueue(commandBuffer);
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}
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}
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/// <summary>
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/// Waits until commands are pushed to the FIFO.
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/// </summary>
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/// <returns>True if commands were received, false if wait timed out</returns>
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public bool WaitForCommands()
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{
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return _event.WaitOne(8);
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}
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/// <summary>
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/// Processes commands pushed to the FIFO.
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/// </summary>
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public void DispatchCalls()
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{
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while (Step());
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}
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/// <summary>
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/// Processes a single command on the FIFO.
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/// </summary>
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/// <returns>True if the FIFO still has commands to be processed, false otherwise</returns>
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private bool Step()
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{
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if (_wordsPosition != _currentCommandBuffer.EntryCount)
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{
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int word = _currentCommandBuffer.ReadAt(_context, _wordsPosition++);
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if (_state.LengthPending != 0)
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{
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_state.LengthPending = 0;
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_state.MethodCount = word & 0xffffff;
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}
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else if (_state.MethodCount != 0)
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{
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CallMethod(word);
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if (!_state.NonIncrementing)
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{
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_state.Method++;
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}
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if (_state.IncrementOnce)
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{
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_state.NonIncrementing = true;
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}
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_state.MethodCount--;
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}
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else
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{
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int submissionMode = (word >> 29) & 7;
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switch (submissionMode)
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{
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case 1:
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// Incrementing.
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SetNonImmediateState(word);
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_state.NonIncrementing = false;
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_state.IncrementOnce = false;
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break;
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case 3:
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// Non-incrementing.
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SetNonImmediateState(word);
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_state.NonIncrementing = true;
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_state.IncrementOnce = false;
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break;
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case 4:
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// Immediate.
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_state.Method = (word >> 0) & 0x1fff;
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_state.SubChannel = (word >> 13) & 7;
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_state.NonIncrementing = true;
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_state.IncrementOnce = false;
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CallMethod((word >> 16) & 0x1fff);
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break;
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case 5:
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// Increment-once.
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SetNonImmediateState(word);
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_state.NonIncrementing = false;
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_state.IncrementOnce = true;
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break;
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}
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}
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}
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else if (_ibEnable && _commandBufferQueue.TryDequeue(out CommandBuffer entry))
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{
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_currentCommandBuffer = entry;
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_wordsPosition = 0;
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_currentCommandBuffer.Fetch(_context);
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}
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else
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{
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return false;
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}
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return true;
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}
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/// <summary>
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/// Sets current non-immediate method call state.
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/// </summary>
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/// <param name="word">Compressed method word</param>
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private void SetNonImmediateState(int word)
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{
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_state.Method = (word >> 0) & 0x1fff;
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_state.SubChannel = (word >> 13) & 7;
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_state.MethodCount = (word >> 16) & 0x1fff;
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}
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/// <summary>
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/// Forwards the method call to GPU engines.
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/// </summary>
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/// <param name="argument">Call argument</param>
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private void CallMethod(int argument)
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{
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_context.Fifo.CallMethod(new MethodParams(
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_state.Method,
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argument,
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_state.SubChannel,
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_state.MethodCount));
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}
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}
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} |