Function cuMemcpyPeerAsync 

pub unsafe fn cuMemcpyPeerAsync(
    dstDevice: u64,
    dstContext: *mut CUctx_st,
    srcDevice: u64,
    srcContext: *mut CUctx_st,
    ByteCount: usize,
    hStream: *mut CUstream_st,
) -> cudaError_enum