public long Map(long Src, long Dst, long Size)
{
bool Success;
lock (Blocks)
{
Success = CheckRange(
Src,
Size,
MemoryState.MapAllowed,
MemoryState.MapAllowed,
MemoryPermission.Mask,
MemoryPermission.ReadAndWrite,
MemoryAttribute.Mask,
MemoryAttribute.None,
MemoryAttribute.IpcAndDeviceMapped,
out MemoryState SrcState,
out _,
out _);
Success &= IsUnmapped(Dst, Size);
if (Success)
{
long PagesCount = Size / PageSize;
InsertBlock(Src, PagesCount, SrcState, MemoryPermission.None, MemoryAttribute.Borrowed);
InsertBlock(Dst, PagesCount, MemoryState.MappedMemory, MemoryPermission.ReadAndWrite);
long PA = CpuMemory.GetPhysicalAddress(Src);
CpuMemory.Map(Dst, PA, Size);
}
}
return(Success ? 0 : MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm));
}
public long MapProcessCodeMemory(long Dst, long Src, long Size)
{
lock (Blocks)
{
long PagesCount = Size / PageSize;
bool Success = IsUnmapped(Dst, Size);
Success &= CheckRange(
Src,
Size,
MemoryState.Mask,
MemoryState.Heap,
MemoryPermission.Mask,
MemoryPermission.ReadAndWrite,
MemoryAttribute.Mask,
MemoryAttribute.None,
MemoryAttribute.IpcAndDeviceMapped,
out _,
out _,
out _);
if (Success)
{
long PA = CpuMemory.GetPhysicalAddress(Src);
InsertBlock(Dst, PagesCount, MemoryState.CodeStatic, MemoryPermission.ReadAndExecute);
InsertBlock(Src, PagesCount, MemoryState.Heap, MemoryPermission.None);
CpuMemory.Map(Dst, PA, Size);
return(0);
}
}
return(MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm));
}
public bool IsRegionModified(AMemory Memory, NvGpuBufferType BufferType, long PA, long Size)
{
(bool[] Modified, long ModifiedCount) = Memory.IsRegionModified(PA, Size);
PA = Memory.GetPhysicalAddress(PA);
ClearCachedPagesIfNeeded();
long PageSize = AMemory.PageSize;
EnsureResidencyInitialized(PageSize);
bool HasResidents = AddResidency(PA, Size);
if (!HasResidents && ModifiedCount == 0)
{
return(false);
}
long Mask = PageSize - 1;
long ResidencyKey = PA;
long PAEnd = PA + Size;
bool RegMod = false;
int Index = 0;
while (PA < PAEnd)
{
long Key = PA & ~AMemory.PageMask;
long PAPgEnd = Math.Min((PA + AMemory.PageSize) & ~AMemory.PageMask, PAEnd);
bool IsCached = Cache.TryGetValue(Key, out CachedPage Cp);
if (IsCached)
{
CpCount -= Cp.GetTotalCount();
SortedCache.Remove(Cp.Node);
}
else
{
Cp = new CachedPage();
Cache.Add(Key, Cp);
}
if (Modified[Index++] && IsCached)
{
Cp = new CachedPage();
Cache[Key] = Cp;
}
Cp.AddResidency(ResidencyKey);
Cp.Node = SortedCache.AddLast(Key);
RegMod |= Cp.AddRange(PA, PAPgEnd, BufferType);
CpCount += Cp.GetTotalCount();
PA = PAPgEnd;
}
return(RegMod);
}