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using Ryujinx.Graphics.Memory;
using System.Collections.Generic;
namespace Ryujinx.HLE.HOS.Services.Nv.NvGpuAS
{
class NvGpuASCtx
{
public NvGpuVmm Vmm { get; private set; }
private class Range
{
public ulong Start { get; private set; }
public ulong End { get; private set; }
public Range(long Position, long Size)
{
Start = (ulong)Position;
End = (ulong)Size + Start;
}
}
private class MappedMemory : Range
{
public long PhysicalAddress { get; private set; }
public bool VaAllocated { get; private set; }
public MappedMemory(
long Position,
long Size,
long PhysicalAddress,
bool VaAllocated) : base(Position, Size)
{
this.PhysicalAddress = PhysicalAddress;
this.VaAllocated = VaAllocated;
}
}
private SortedList<long, Range> Maps;
private SortedList<long, Range> Reservations;
public NvGpuASCtx(ServiceCtx Context)
{
Vmm = new NvGpuVmm(Context.Memory);
Maps = new SortedList<long, Range>();
Reservations = new SortedList<long, Range>();
}
public bool ValidateFixedBuffer(long Position, long Size)
{
long MapEnd = Position + Size;
//Check if size is valid (0 is also not allowed).
if ((ulong)MapEnd <= (ulong)Position)
{
return false;
}
//Check if address is page aligned.
if ((Position & NvGpuVmm.PageMask) != 0)
{
return false;
}
//Check if region is reserved.
if (BinarySearch(Reservations, Position) == null)
{
return false;
}
//Check for overlap with already mapped buffers.
Range Map = BinarySearchLt(Maps, MapEnd);
if (Map != null && Map.End > (ulong)Position)
{
return false;
}
return true;
}
public void AddMap(
long Position,
long Size,
long PhysicalAddress,
bool VaAllocated)
{
Maps.Add(Position, new MappedMemory(Position, Size, PhysicalAddress, VaAllocated));
}
public bool RemoveMap(long Position, out long Size)
{
Size = 0;
if (Maps.Remove(Position, out Range Value))
{
MappedMemory Map = (MappedMemory)Value;
if (Map.VaAllocated)
{
Size = (long)(Map.End - Map.Start);
}
return true;
}
return false;
}
public bool TryGetMapPhysicalAddress(long Position, out long PhysicalAddress)
{
Range Map = BinarySearch(Maps, Position);
if (Map != null)
{
PhysicalAddress = ((MappedMemory)Map).PhysicalAddress;
return true;
}
PhysicalAddress = 0;
return false;
}
public void AddReservation(long Position, long Size)
{
Reservations.Add(Position, new Range(Position, Size));
}
public bool RemoveReservation(long Position)
{
return Reservations.Remove(Position);
}
private Range BinarySearch(SortedList<long, Range> Lst, long Position)
{
int Left = 0;
int Right = Lst.Count - 1;
while (Left <= Right)
{
int Size = Right - Left;
int Middle = Left + (Size >> 1);
Range Rg = Lst.Values[Middle];
if ((ulong)Position >= Rg.Start && (ulong)Position < Rg.End)
{
return Rg;
}
if ((ulong)Position < Rg.Start)
{
Right = Middle - 1;
}
else
{
Left = Middle + 1;
}
}
return null;
}
private Range BinarySearchLt(SortedList<long, Range> Lst, long Position)
{
Range LtRg = null;
int Left = 0;
int Right = Lst.Count - 1;
while (Left <= Right)
{
int Size = Right - Left;
int Middle = Left + (Size >> 1);
Range Rg = Lst.Values[Middle];
if ((ulong)Position < Rg.Start)
{
Right = Middle - 1;
}
else
{
Left = Middle + 1;
if ((ulong)Position > Rg.Start)
{
LtRg = Rg;
}
}
}
return LtRg;
}
}
}
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