pc_jacobi_device.F90

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module device_jacobi
  use precon, only : pc_t
  use coefs, only : coef_t
  use dofmap, only : dofmap_t
  use num_types, only : rp
  use device_math, only : device_col2, device_addcol3, device_invcol1,&
       device_col3
  use device, only : device_map, device_event_create, device_unmap, &
       device_event_sync, device_get_ptr, device_event_destroy
  use gather_scatter, only : gs_t, gs_op_add
  use, intrinsic :: iso_c_binding, only : c_ptr, c_null_ptr, c_associated
  implicit none
  private
 
  type, public, extends(pc_t) :: device_jacobi_t
     real(kind=rp), allocatable :: d(:,:,:,:)
     type(c_ptr) :: d_d = c_null_ptr
     type(gs_t), pointer :: gs_h
     type(dofmap_t), pointer :: dof
     type(coef_t), pointer :: coef
     type(c_ptr) :: gs_event = c_null_ptr
   contains
     procedure, pass(this) :: init => device_jacobi_init
     procedure, pass(this) :: free => device_jacobi_free
     procedure, pass(this) :: solve => device_jacobi_solve
     procedure, pass(this) :: update => device_jacobi_update
  end type device_jacobi_t
 
  interface
     subroutine hip_jacobi_update(d_d, dxt_d, dyt_d, dzt_d, &
          G11_d, G22_d, G33_d, G12_d, G13_d, G23_d, nelv, lx) &
          bind(c, name='hip_jacobi_update')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: d_d, dxt_d, dyt_d, dzt_d
       type(c_ptr), value :: G11_d, G22_d, G33_d, G12_d, G13_d, G23_d
       integer(c_int) :: nelv, lx
     end subroutine hip_jacobi_update
  end interface
 
  interface
     subroutine cuda_jacobi_update(d_d, dxt_d, dyt_d, dzt_d, &
          G11_d, G22_d, G33_d, G12_d, G13_d, G23_d, nelv, lx) &
          bind(c, name='cuda_jacobi_update')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: d_d, dxt_d, dyt_d, dzt_d
       type(c_ptr), value :: G11_d, G22_d, G33_d, G12_d, G13_d, G23_d
       integer(c_int) :: nelv, lx
     end subroutine cuda_jacobi_update
  end interface
 
  interface
     subroutine opencl_jacobi_update(d_d, dxt_d, dyt_d, dzt_d, &
          G11_d, G22_d, G33_d, G12_d, G13_d, G23_d, nelv, lx) &
          bind(c, name='opencl_jacobi_update')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: d_d, dxt_d, dyt_d, dzt_d
       type(c_ptr), value :: G11_d, G22_d, G33_d, G12_d, G13_d, G23_d
       integer(c_int) :: nelv, lx
     end subroutine opencl_jacobi_update
  end interface
 
contains
 
  subroutine device_jacobi_init(this, coef, dof, gs_h)
    class(device_jacobi_t), intent(inout) :: this
    type(coef_t), intent(in), target :: coef
    type(dofmap_t), intent(in), target :: dof
    type(gs_t), intent(inout), target :: gs_h
 
    call this%free()
 
    this%gs_h => gs_h
    this%dof => dof
    this%coef => coef
 
    allocate(this%d(dof%Xh%lx,dof%Xh%ly,dof%Xh%lz, dof%msh%nelv))
 
    call device_map(this%d, this%d_d, size(this%d))
 
    call device_event_create(this%gs_event, 2)
 
    call device_jacobi_update(this)
 
  end subroutine device_jacobi_init
 
  subroutine device_jacobi_free(this)
    class(device_jacobi_t), intent(inout) :: this
 
    if (allocated(this%d)) then
       if (c_associated(this%d_d)) then
          call device_unmap(this%d, this%d_d)
       end if
       deallocate(this%d)
    end if
 
    if (c_associated(this%gs_event)) then
       call device_event_destroy(this%gs_event)
    end if
 
    nullify(this%dof)
    nullify(this%gs_h)
    nullify(this%coef)
  end subroutine device_jacobi_free
 
  subroutine device_jacobi_solve(this, z, r, n)
    integer, intent(in) :: n
    class(device_jacobi_t), intent(inout) :: this
    real(kind=rp), dimension(n), intent(inout) :: z
    real(kind=rp), dimension(n), intent(inout) :: r
    type(c_ptr) :: z_d, r_d
 
    z_d = device_get_ptr(z)
    r_d = device_get_ptr(r)
 
    call device_col3(z_d, r_d, this%d_d, n)
 
  end subroutine device_jacobi_solve
 
  subroutine device_jacobi_update(this)
    class(device_jacobi_t), intent(inout) :: this
    integer :: lz, ly, lx
    associate(dof => this%dof, coef => this%coef, xh => this%dof%Xh, &
         gs_h => this%gs_h, nelv => this%dof%msh%nelv)
 
      lx = xh%lx
      ly = xh%ly
      lz = xh%lz
 
#ifdef HAVE_HIP
      call hip_jacobi_update(this%d_d, xh%dxt_d, xh%dyt_d, xh%dzt_d, &
           coef%G11_d, coef%G22_d, coef%G33_d, &
           coef%G12_d, coef%G13_d, coef%G23_d, &
           nelv, lx)
#elif HAVE_CUDA
      call cuda_jacobi_update(this%d_d, xh%dxt_d, xh%dyt_d, xh%dzt_d, &
           coef%G11_d, coef%G22_d, coef%G33_d, &
           coef%G12_d, coef%G13_d, coef%G23_d, &
           nelv, lx)
#elif HAVE_OPENCL
      call opencl_jacobi_update(this%d_d, xh%dxt_d, xh%dyt_d, xh%dzt_d, &
           coef%G11_d, coef%G22_d, coef%G33_d, &
           coef%G12_d, coef%G13_d, coef%G23_d, &
           nelv, lx)
#endif
 
      call device_col2(this%d_d, coef%h1_d, coef%dof%size())
 
      if (coef%ifh2) then
         call device_addcol3(this%d_d, coef%h2_d, coef%B_d, coef%dof%size())
      end if
 
      call gs_h%op(this%d, dof%size(), gs_op_add, this%gs_event)
      call device_event_sync(this%gs_event)
 
      call device_invcol1(this%d_d, dof%size())
    end associate
  end subroutine device_jacobi_update
 
end module device_jacobi