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using Ryujinx.Graphics.Memory;
using System.Collections.Concurrent;
using System.Threading;
namespace Ryujinx.Graphics
{
public class DmaPusher
{
private ConcurrentQueue<(NvGpuVmm, long)> _ibBuffer;
private long _dmaPut;
private long _dmaGet;
private struct DmaState
{
public int Method;
public int SubChannel;
public int MethodCount;
public bool NonIncrementing;
public bool IncrementOnce;
public int LengthPending;
}
private DmaState _state;
private bool _sliEnable;
private bool _sliActive;
private bool _ibEnable;
private bool _nonMain;
private long _dmaMGet;
private NvGpuVmm _vmm;
private NvGpu _gpu;
private AutoResetEvent _event;
public DmaPusher(NvGpu gpu)
{
_gpu = gpu;
_ibBuffer = new ConcurrentQueue<(NvGpuVmm, long)>();
_ibEnable = true;
_event = new AutoResetEvent(false);
}
public void Push(NvGpuVmm vmm, long entry)
{
_ibBuffer.Enqueue((vmm, entry));
_event.Set();
}
public bool WaitForCommands()
{
return _event.WaitOne(8);
}
public void DispatchCalls()
{
while (Step());
}
private bool Step()
{
if (_dmaGet != _dmaPut)
{
int word = _vmm.ReadInt32(_dmaGet);
_dmaGet += 4;
if (!_nonMain)
{
_dmaMGet = _dmaGet;
}
if (_state.LengthPending != 0)
{
_state.LengthPending = 0;
_state.MethodCount = word & 0xffffff;
}
else if (_state.MethodCount != 0)
{
if (!_sliEnable || _sliActive)
{
CallMethod(word);
}
if (!_state.NonIncrementing)
{
_state.Method++;
}
if (_state.IncrementOnce)
{
_state.NonIncrementing = true;
}
_state.MethodCount--;
}
else
{
int sumissionMode = (word >> 29) & 7;
switch (sumissionMode)
{
case 1:
//Incrementing.
SetNonImmediateState(word);
_state.NonIncrementing = false;
_state.IncrementOnce = false;
break;
case 3:
//Non-incrementing.
SetNonImmediateState(word);
_state.NonIncrementing = true;
_state.IncrementOnce = false;
break;
case 4:
//Immediate.
_state.Method = (word >> 0) & 0x1fff;
_state.SubChannel = (word >> 13) & 7;
_state.NonIncrementing = true;
_state.IncrementOnce = false;
CallMethod((word >> 16) & 0x1fff);
break;
case 5:
//Increment-once.
SetNonImmediateState(word);
_state.NonIncrementing = false;
_state.IncrementOnce = true;
break;
}
}
}
else if (_ibEnable && _ibBuffer.TryDequeue(out (NvGpuVmm Vmm, long Entry) tuple))
{
_vmm = tuple.Vmm;
long entry = tuple.Entry;
int length = (int)(entry >> 42) & 0x1fffff;
_dmaGet = entry & 0xfffffffffc;
_dmaPut = _dmaGet + length * 4;
_nonMain = (entry & (1L << 41)) != 0;
_gpu.ResourceManager.ClearPbCache();
}
else
{
return false;
}
return true;
}
private void SetNonImmediateState(int word)
{
_state.Method = (word >> 0) & 0x1fff;
_state.SubChannel = (word >> 13) & 7;
_state.MethodCount = (word >> 16) & 0x1fff;
}
private void CallMethod(int argument)
{
_gpu.Fifo.CallMethod(_vmm, new GpuMethodCall(
_state.Method,
argument,
_state.SubChannel,
_state.MethodCount));
}
}
}
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