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Ryujinx/Ryujinx.Graphics.Gpu/Engine/Dma/DmaClass.cs
gdkchan ac4ec1a015
Account for negative strides on DMA copy (#2623)
* Account for negative strides on DMA copy

* Should account for non-zero Y
2021-09-11 22:54:18 +02:00

300 lines
12 KiB
C#

using Ryujinx.Common;
using Ryujinx.Graphics.Device;
using Ryujinx.Graphics.Gpu.Engine.Threed;
using Ryujinx.Graphics.Texture;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
namespace Ryujinx.Graphics.Gpu.Engine.Dma
{
/// <summary>
/// Represents a DMA copy engine class.
/// </summary>
class DmaClass : IDeviceState
{
private readonly GpuContext _context;
private readonly GpuChannel _channel;
private readonly ThreedClass _3dEngine;
private readonly DeviceState<DmaClassState> _state;
/// <summary>
/// Copy flags passed on DMA launch.
/// </summary>
[Flags]
private enum CopyFlags
{
SrcLinear = 1 << 7,
DstLinear = 1 << 8,
MultiLineEnable = 1 << 9,
RemapEnable = 1 << 10
}
/// <summary>
/// Creates a new instance of the DMA copy engine class.
/// </summary>
/// <param name="context">GPU context</param>
/// <param name="channel">GPU channel</param>
/// <param name="threedEngine">3D engine</param>
public DmaClass(GpuContext context, GpuChannel channel, ThreedClass threedEngine)
{
_context = context;
_channel = channel;
_3dEngine = threedEngine;
_state = new DeviceState<DmaClassState>(new Dictionary<string, RwCallback>
{
{ nameof(DmaClassState.LaunchDma), new RwCallback(LaunchDma, null) }
});
}
/// <summary>
/// Reads data from the class registers.
/// </summary>
/// <param name="offset">Register byte offset</param>
/// <returns>Data at the specified offset</returns>
public int Read(int offset) => _state.Read(offset);
/// <summary>
/// Writes data to the class registers.
/// </summary>
/// <param name="offset">Register byte offset</param>
/// <param name="data">Data to be written</param>
public void Write(int offset, int data) => _state.Write(offset, data);
/// <summary>
/// Determine if a buffer-to-texture region covers the entirety of a texture.
/// </summary>
/// <param name="tex">Texture to compare</param>
/// <param name="linear">True if the texture is linear, false if block linear</param>
/// <param name="bpp">Texture bytes per pixel</param>
/// <param name="stride">Texture stride</param>
/// <param name="xCount">Number of pixels to be copied</param>
/// <param name="yCount">Number of lines to be copied</param>
/// <returns></returns>
private static bool IsTextureCopyComplete(DmaTexture tex, bool linear, int bpp, int stride, int xCount, int yCount)
{
if (linear)
{
// If the stride is negative, the texture has to be flipped, so
// the fast copy is not trivial, use the slow path.
if (stride <= 0)
{
return false;
}
int alignWidth = Constants.StrideAlignment / bpp;
return tex.RegionX == 0 &&
tex.RegionY == 0 &&
stride / bpp == BitUtils.AlignUp(xCount, alignWidth);
}
else
{
int alignWidth = Constants.GobAlignment / bpp;
return tex.RegionX == 0 &&
tex.RegionY == 0 &&
tex.Width == BitUtils.AlignUp(xCount, alignWidth) &&
tex.Height == yCount;
}
}
/// <summary>
/// Performs a buffer to buffer, or buffer to texture copy.
/// </summary>
/// <param name="argument">Method call argument</param>
private void LaunchDma(int argument)
{
var memoryManager = _channel.MemoryManager;
CopyFlags copyFlags = (CopyFlags)argument;
bool srcLinear = copyFlags.HasFlag(CopyFlags.SrcLinear);
bool dstLinear = copyFlags.HasFlag(CopyFlags.DstLinear);
bool copy2D = copyFlags.HasFlag(CopyFlags.MultiLineEnable);
bool remap = copyFlags.HasFlag(CopyFlags.RemapEnable);
uint size = _state.State.LineLengthIn;
if (size == 0)
{
return;
}
ulong srcGpuVa = ((ulong)_state.State.OffsetInUpperUpper << 32) | _state.State.OffsetInLower;
ulong dstGpuVa = ((ulong)_state.State.OffsetOutUpperUpper << 32) | _state.State.OffsetOutLower;
int xCount = (int)_state.State.LineLengthIn;
int yCount = (int)_state.State.LineCount;
_3dEngine.FlushUboDirty();
if (copy2D)
{
// Buffer to texture copy.
int componentSize = (int)_state.State.SetRemapComponentsComponentSize + 1;
int srcBpp = remap ? ((int)_state.State.SetRemapComponentsNumSrcComponents + 1) * componentSize : 1;
int dstBpp = remap ? ((int)_state.State.SetRemapComponentsNumDstComponents + 1) * componentSize : 1;
var dst = Unsafe.As<uint, DmaTexture>(ref _state.State.SetDstBlockSize);
var src = Unsafe.As<uint, DmaTexture>(ref _state.State.SetSrcBlockSize);
int srcStride = (int)_state.State.PitchIn;
int dstStride = (int)_state.State.PitchOut;
var srcCalculator = new OffsetCalculator(
src.Width,
src.Height,
srcStride,
srcLinear,
src.MemoryLayout.UnpackGobBlocksInY(),
src.MemoryLayout.UnpackGobBlocksInZ(),
srcBpp);
var dstCalculator = new OffsetCalculator(
dst.Width,
dst.Height,
dstStride,
dstLinear,
dst.MemoryLayout.UnpackGobBlocksInY(),
dst.MemoryLayout.UnpackGobBlocksInZ(),
dstBpp);
(int srcBaseOffset, int srcSize) = srcCalculator.GetRectangleRange(src.RegionX, src.RegionY, xCount, yCount);
(int dstBaseOffset, int dstSize) = dstCalculator.GetRectangleRange(dst.RegionX, dst.RegionY, xCount, yCount);
if (srcLinear && srcStride < 0)
{
srcBaseOffset += srcStride * (yCount - 1);
}
if (dstLinear && dstStride < 0)
{
dstBaseOffset += dstStride * (yCount - 1);
}
ReadOnlySpan<byte> srcSpan = memoryManager.GetSpan(srcGpuVa + (ulong)srcBaseOffset, srcSize, true);
Span<byte> dstSpan = memoryManager.GetSpan(dstGpuVa + (ulong)dstBaseOffset, dstSize).ToArray();
bool completeSource = IsTextureCopyComplete(src, srcLinear, srcBpp, srcStride, xCount, yCount);
bool completeDest = IsTextureCopyComplete(dst, dstLinear, dstBpp, dstStride, xCount, yCount);
if (completeSource && completeDest)
{
var target = memoryManager.Physical.TextureCache.FindTexture(
memoryManager,
dst,
dstGpuVa,
dstBpp,
dstStride,
xCount,
yCount,
dstLinear);
if (target != null)
{
ReadOnlySpan<byte> data;
if (srcLinear)
{
data = LayoutConverter.ConvertLinearStridedToLinear(
target.Info.Width,
target.Info.Height,
1,
1,
srcStride,
target.Info.FormatInfo.BytesPerPixel,
srcSpan);
}
else
{
data = LayoutConverter.ConvertBlockLinearToLinear(
src.Width,
src.Height,
1,
target.Info.Levels,
1,
1,
1,
srcBpp,
src.MemoryLayout.UnpackGobBlocksInY(),
src.MemoryLayout.UnpackGobBlocksInZ(),
1,
new SizeInfo((int)target.Size),
srcSpan);
}
target.SetData(data);
target.SignalModified();
return;
}
else if (srcCalculator.LayoutMatches(dstCalculator))
{
srcSpan.CopyTo(dstSpan); // No layout conversion has to be performed, just copy the data entirely.
memoryManager.Write(dstGpuVa + (ulong)dstBaseOffset, dstSpan);
return;
}
}
unsafe bool Convert<T>(Span<byte> dstSpan, ReadOnlySpan<byte> srcSpan) where T : unmanaged
{
fixed (byte* dstPtr = dstSpan, srcPtr = srcSpan)
{
byte* dstBase = dstPtr - dstBaseOffset; // Layout offset is relative to the base, so we need to subtract the span's offset.
byte* srcBase = srcPtr - srcBaseOffset;
for (int y = 0; y < yCount; y++)
{
srcCalculator.SetY(src.RegionY + y);
dstCalculator.SetY(dst.RegionY + y);
for (int x = 0; x < xCount; x++)
{
int srcOffset = srcCalculator.GetOffset(src.RegionX + x);
int dstOffset = dstCalculator.GetOffset(dst.RegionX + x);
*(T*)(dstBase + dstOffset) = *(T*)(srcBase + srcOffset);
}
}
}
return true;
}
bool _ = srcBpp switch
{
1 => Convert<byte>(dstSpan, srcSpan),
2 => Convert<ushort>(dstSpan, srcSpan),
4 => Convert<uint>(dstSpan, srcSpan),
8 => Convert<ulong>(dstSpan, srcSpan),
12 => Convert<Bpp12Pixel>(dstSpan, srcSpan),
16 => Convert<Vector128<byte>>(dstSpan, srcSpan),
_ => throw new NotSupportedException($"Unable to copy ${srcBpp} bpp pixel format.")
};
memoryManager.Write(dstGpuVa + (ulong)dstBaseOffset, dstSpan);
}
else
{
if (remap &&
_state.State.SetRemapComponentsDstX == SetRemapComponentsDst.ConstA &&
_state.State.SetRemapComponentsDstY == SetRemapComponentsDst.ConstA &&
_state.State.SetRemapComponentsDstZ == SetRemapComponentsDst.ConstA &&
_state.State.SetRemapComponentsDstW == SetRemapComponentsDst.ConstA &&
_state.State.SetRemapComponentsNumSrcComponents == SetRemapComponentsNumComponents.One &&
_state.State.SetRemapComponentsNumDstComponents == SetRemapComponentsNumComponents.One &&
_state.State.SetRemapComponentsComponentSize == SetRemapComponentsComponentSize.Four)
{
// Fast path for clears when remap is enabled.
memoryManager.Physical.BufferCache.ClearBuffer(memoryManager, dstGpuVa, size * 4, _state.State.SetRemapConstA);
}
else
{
// TODO: Implement remap functionality.
// Buffer to buffer copy.
memoryManager.Physical.BufferCache.CopyBuffer(memoryManager, srcGpuVa, dstGpuVa, size);
}
}
}
}
}