Bulk tuning and tuned-parameter management for OpenCL SMM kernels are now part of the LIBXSTREAM SMM sample rather than DBCSR's documentation. See LIBXSTREAM for the current scripts, partitioning options, and tuned-parameter update workflow.
DBCSR users normally only need the resulting LIBXSTREAM/LIBXS installation and the DBCSR build option -DUSE_ACCEL=opencl.