PLASMA is supposed to be a replacement for LAPACK, for now just covering a small subset of LAPACK's routines.
At the same time PLASMA internally calls some LAPACK routines.
In the next release the user will have the option to provide LAPACK (give path to LAPACK's location) or use PLASMA's installer, which will automatically download and build LAPACK for the user.
PLASMA provides CGETRF and CGETRS. It also provides CGESV, which does the work of both CGETRF and CGETRS.
PLASMA does not provide CGETR2. CGETR2 is required because it is called by CGETRF.
PLASMA's CGETRF also calls LAPACK's CGETR2, which is one of the reasons why PLASMA requires LAPACK.