private NvResult GetIoctlArgument(ServiceCtx context, NvIoctl ioctlCommand, out Span <byte> arguments)
{
(long inputDataPosition, long inputDataSize) = context.Request.GetBufferType0x21(0);
(long outputDataPosition, long outputDataSize) = context.Request.GetBufferType0x22(0);
NvIoctl.Direction ioctlDirection = ioctlCommand.DirectionValue;
uint ioctlSize = ioctlCommand.Size;
bool isRead = (ioctlDirection & NvIoctl.Direction.Read) != 0;
bool isWrite = (ioctlDirection & NvIoctl.Direction.Write) != 0;
if ((isWrite && ioctlSize > outputDataSize) || (isRead && ioctlSize > inputDataSize))
{
arguments = null;
Logger.Warning?.Print(LogClass.ServiceNv, "Ioctl size inconsistency found!");
return(NvResult.InvalidSize);
}
if (isRead && isWrite)
{
if (outputDataSize < inputDataSize)
{
arguments = null;
Logger.Warning?.Print(LogClass.ServiceNv, "Ioctl size inconsistency found!");
return(NvResult.InvalidSize);
}
byte[] outputData = new byte[outputDataSize];
byte[] temp = new byte[inputDataSize];
context.Memory.Read((ulong)inputDataPosition, temp);
Buffer.BlockCopy(temp, 0, outputData, 0, temp.Length);
arguments = new Span <byte>(outputData);
}
else if (isWrite)
{
byte[] outputData = new byte[outputDataSize];
arguments = new Span <byte>(outputData);
}
else
{
byte[] temp = new byte[inputDataSize];
context.Memory.Read((ulong)inputDataPosition, temp);
arguments = new Span <byte>(temp);
}
return(NvResult.Success);
}
[Command(12)] // 3.0.0+
// Ioctl3(s32 fd, u32 ioctl_cmd, buffer<bytes, 0x21> in_args) -> (u32 error_code, buffer<bytes, 0x22> out_args, buffer<bytes, 0x22> inline_out_buffer)
public ResultCode Ioctl3(ServiceCtx context)
{
NvResult errorCode = EnsureInitialized();
if (errorCode == NvResult.Success)
{
int fd = context.RequestData.ReadInt32();
NvIoctl ioctlCommand = context.RequestData.ReadStruct <NvIoctl>();
(long inlineOutBufferPosition, long inlineOutBufferSize) = context.Request.GetBufferType0x22(1);
errorCode = GetIoctlArgument(context, ioctlCommand, out Span <byte> arguments);
byte[] temp = new byte[inlineOutBufferSize];
context.Memory.Read((ulong)inlineOutBufferPosition, temp);
Span <byte> inlineOutBuffer = new Span <byte>(temp);
if (errorCode == NvResult.Success)
{
errorCode = GetDeviceFileFromFd(fd, out NvDeviceFile deviceFile);
if (errorCode == NvResult.Success)
{
NvInternalResult internalResult = deviceFile.Ioctl3(ioctlCommand, arguments, inlineOutBuffer);
if (internalResult == NvInternalResult.NotImplemented)
{
throw new NvIoctlNotImplementedException(context, deviceFile, ioctlCommand);
}
errorCode = ConvertInternalErrorCode(internalResult);
if ((ioctlCommand.DirectionValue & NvIoctl.Direction.Write) != 0)
{
context.Memory.Write((ulong)context.Request.GetBufferType0x22(0).Position, arguments.ToArray());
context.Memory.Write((ulong)inlineOutBufferPosition, inlineOutBuffer.ToArray());
}
}
}
}
context.ResponseData.Write((uint)errorCode);
return(ResultCode.Success);
}