diff --git a/cuda/Makefile b/cuda/Makefile
index a24a6184..395b6151 100755
--- a/cuda/Makefile
+++ b/cuda/Makefile
@@ -44,7 +44,8 @@ FOBJS=cusparse_mod.o base_cusparse_mod.o \
 
 COBJS= elldev.o hlldev.o diagdev.o hdiagdev.o vectordev.o  ivectordev.o dnsdev.o\
 	svectordev.o dvectordev.o cvectordev.o zvectordev.o cuda_util.o \
-	fcusparse.o scusparse.o dcusparse.o ccusparse.o zcusparse.o 
+	fcusparse.o scusparse.o dcusparse.o ccusparse.o zcusparse.o \
+        dcsga.o
 
 OBJS=$(COBJS) $(FOBJS)
 
diff --git a/cuda/d_csga_mod.F90 b/cuda/d_csga_mod.F90
index 04e72192..f2cfd745 100644
--- a/cuda/d_csga_mod.F90
+++ b/cuda/d_csga_mod.F90
@@ -28,10 +28,10 @@
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
 !   
-  
-
 module d_csga_mod
   use d_cusparse_mod
+  integer, parameter :: MAX_NNZ_PER_WG = 4096
+  integer, parameter :: MAX_GRID_SIZE  = 65536
   
   type, bind(c) :: d_CAmat
     type(c_ptr) :: Mat = c_null_ptr
@@ -47,5 +47,66 @@ module d_csga_mod
     end function d_CSGADeviceFree
   end interface
 
+  interface CSGADeviceAlloc
+    function d_CSGADeviceAlloc(Mat,nr,nc,nz) &
+         & bind(c,name="d_CSGADeviceAlloc") result(res)
+      use iso_c_binding
+      import  d_CAmat
+      type(d_CAmat)          :: Mat
+      integer(c_int), value :: nr, nc, nz
+      integer(c_int)        :: res
+    end function d_CSGADeviceAlloc
+  end interface
+  
+  interface CSGADeviceSetMatDiagType
+    function d_CSGADeviceSetMatDiagType(Mat,type) &
+         & bind(c,name="d_CSGADeviceSetMatDiagType") result(res)
+      use iso_c_binding
+      import  d_CAmat
+      type(d_CAmat)          :: Mat
+      integer(c_int),value  :: type
+      integer(c_int)        :: res
+    end function d_CSGADeviceSetMatDiagType
+  end interface
+    
+  interface CSGADeviceSetMatFillMode
+    function d_CSGADeviceSetMatFillMode(Mat,type) &
+         & bind(c,name="d_CSGADeviceSetMatFillMode") result(res)
+      use iso_c_binding
+      import  d_CAmat
+      type(d_CAmat)          :: Mat
+      integer(c_int),value  :: type
+      integer(c_int)        :: res
+    end function d_CSGADeviceSetMatFillMode
+  end interface
   
+  interface CSGAHost2Device
+    function d_CSGAHost2Device(Mat,m,n,nz,irp,ja,val,rowBlocks) &
+         &  bind(c,name="d_CSGAHost2Device") result(res)
+      use iso_c_binding
+      import  d_CAmat
+      type(d_CAmat)          :: Mat
+      integer(c_int), value :: m,n,nz
+      integer(c_int)        :: irp(*), ja(*), rowBlocks(*)
+      real(c_double)         :: val(*)
+      integer(c_int)        :: res
+    end function d_CSGAHost2Device
+  end interface
+  
+  interface CSGADevice2Host
+    function d_CSGADevice2Host(Mat,m,n,nz,irp,ja,val,rowBlocks) &
+         &  bind(c,name="d_CSGADevice2Host") result(res)
+      use iso_c_binding
+      import  d_CAmat
+      type(d_CAmat)          :: Mat
+      integer(c_int), value :: m,n,nz
+      integer(c_int)        :: irp(*), ja(*), rowBlocks(*)
+      real(c_double)         :: val(*)
+      integer(c_int)        :: res
+    end function d_CSGADevice2Host
+  end interface
+  
+
+  
+
 end module d_csga_mod
diff --git a/cuda/psb_d_cuda_csga_mat_mod.F90 b/cuda/psb_d_cuda_csga_mat_mod.F90
index 977bfc49..d6edf7f9 100644
--- a/cuda/psb_d_cuda_csga_mat_mod.F90
+++ b/cuda/psb_d_cuda_csga_mat_mod.F90
@@ -35,11 +35,13 @@ module psb_d_cuda_csga_mat_mod
   use iso_c_binding
   use psb_d_mat_mod
   use psb_d_cuda_csrg_mat_mod
+  use d_csga_mod
 
   type, extends(psb_d_cuda_csrg_sparse_mat) :: psb_d_cuda_csga_sparse_mat
     !
     ! Format for CSR Adaptive. 
-    ! 
+    !
+    type(d_CAmat)    :: deviceAMat
     integer(psb_ipk_), allocatable :: rowBlocks(:)
   contains
     procedure, nopass  :: get_fmt       => d_cuda_csga_get_fmt
@@ -336,13 +338,12 @@ contains
 !!$  end subroutine d_cuda_csga_sync
 
   subroutine  d_cuda_csga_free(a) 
-    use cusparse_mod
     implicit none 
     integer(psb_ipk_) :: info
 
     class(psb_d_cuda_csga_sparse_mat), intent(inout) :: a
 
-    info = 0 !CSGADeviceFree(a%deviceMat)
+    info = CSGADeviceFree(a%deviceAMat)
     call a%psb_d_csr_sparse_mat%free()
     
     return
@@ -350,13 +351,12 @@ contains
   end subroutine d_cuda_csga_free
 
   subroutine  d_cuda_csga_finalize(a) 
-    use cusparse_mod
     implicit none 
     integer(psb_ipk_) :: info
     
     type(psb_d_cuda_csga_sparse_mat), intent(inout) :: a
 
-    info = 0 !CSGADeviceFree(a%deviceMat)
+    info = CSGADeviceFree(a%deviceAMat)
     
     return