/*! \file */
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#ifndef ROCSPARSE_BSRMV_H
#define ROCSPARSE_BSRMV_H

#include "../../rocsparse-types.h"
#include "rocsparse/rocsparse-export.h"

#ifdef __cplusplus
extern "C" {
#endif

/*! \ingroup level2_module
*  \details
*  \p rocsparse_bsrmv_analysis performs the analysis step for \ref rocsparse_sbsrmv "rocsparse_Xbsrmv()".
*  It is expected that this function will be executed only once for a given sparsity pattern and particular operation
*  type. The gathered analysis meta data is stored in the \ref rocsparse_mat_info object and can be cleared by
*  \ref rocsparse_bsrmv_clear().
*
*  If the matrix sparsity pattern changes, the gathered information will become invalid. To perform another
*  sparse matrix multiplication with a matrix having a different sparsity pattern, either destroy
*  the old \p info object and create a new one or clear the existing \p info object using
*  \ref rocsparse_bsrmv_clear(). In both cases, the analysis will need to be called again.
*
*  \note
*  This function is non-blocking and executed asynchronously with respect to the host.
*  It can return before the actual computation has finished.
*
*  \note
*  This routine does not support execution in a hipGraph context.
*
*  @param[in]
*  handle      handle to the rocSPARSE library context queue.
*  @param[in]
*  dir         matrix storage of BSR blocks.
*  @param[in]
*  trans       matrix operation type.
*  @param[in]
*  mb          number of block rows of the sparse BSR matrix.
*  @param[in]
*  nb          number of block columns of the sparse BSR matrix.
*  @param[in]
*  nnzb        number of non-zero blocks of the sparse BSR matrix.
*  @param[in]
*  descr       descriptor of the sparse BSR matrix. Currently, only
*              \ref rocsparse_matrix_type_general is supported.
*  @param[in]
*  bsr_val     array of \p nnzb blocks of the sparse BSR matrix.
*  @param[in]
*  bsr_row_ptr array of \p mb+1 elements that point to the start of every block row of
*              the sparse BSR matrix.
*  @param[in]
*  bsr_col_ind array of \p nnzb elements containing the block column indices of the sparse
*              BSR matrix.
*  @param[in]
*  block_dim     block dimension of the sparse BSR matrix.
*  @param[out]
*  info        structure that holds the information collected during the analysis step.
*
*  \retval     rocsparse_status_success the operation completed successfully.
*  \retval     rocsparse_status_invalid_handle the library context was not initialized.
*  \retval     rocsparse_status_invalid_size \p mb, \p nb, or \p nnzb is invalid.
*  \retval     rocsparse_status_invalid_pointer \p descr, \p bsr_val, \p bsr_row_ptr,
*              \p bsr_col_ind, or \p info pointer is invalid.
*  \retval     rocsparse_status_memory_error the buffer for the gathered information
*              could not be allocated.
*  \retval     rocsparse_status_internal_error an internal error occurred.
*  \retval     rocsparse_status_not_implemented
*              \p trans != \ref rocsparse_operation_none or
*              \ref rocsparse_matrix_type != \ref rocsparse_matrix_type_general.
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_sbsrmv_analysis(rocsparse_handle          handle,
                                           rocsparse_direction       dir,
                                           rocsparse_operation       trans,
                                           rocsparse_int             mb,
                                           rocsparse_int             nb,
                                           rocsparse_int             nnzb,
                                           const rocsparse_mat_descr descr,
                                           const float*              bsr_val,
                                           const rocsparse_int*      bsr_row_ptr,
                                           const rocsparse_int*      bsr_col_ind,
                                           rocsparse_int             block_dim,
                                           rocsparse_mat_info        info);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_dbsrmv_analysis(rocsparse_handle          handle,
                                           rocsparse_direction       dir,
                                           rocsparse_operation       trans,
                                           rocsparse_int             mb,
                                           rocsparse_int             nb,
                                           rocsparse_int             nnzb,
                                           const rocsparse_mat_descr descr,
                                           const double*             bsr_val,
                                           const rocsparse_int*      bsr_row_ptr,
                                           const rocsparse_int*      bsr_col_ind,
                                           rocsparse_int             block_dim,
                                           rocsparse_mat_info        info);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_cbsrmv_analysis(rocsparse_handle               handle,
                                           rocsparse_direction            dir,
                                           rocsparse_operation            trans,
                                           rocsparse_int                  mb,
                                           rocsparse_int                  nb,
                                           rocsparse_int                  nnzb,
                                           const rocsparse_mat_descr      descr,
                                           const rocsparse_float_complex* bsr_val,
                                           const rocsparse_int*           bsr_row_ptr,
                                           const rocsparse_int*           bsr_col_ind,
                                           rocsparse_int                  block_dim,
                                           rocsparse_mat_info             info);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_zbsrmv_analysis(rocsparse_handle                handle,
                                           rocsparse_direction             dir,
                                           rocsparse_operation             trans,
                                           rocsparse_int                   mb,
                                           rocsparse_int                   nb,
                                           rocsparse_int                   nnzb,
                                           const rocsparse_mat_descr       descr,
                                           const rocsparse_double_complex* bsr_val,
                                           const rocsparse_int*            bsr_row_ptr,
                                           const rocsparse_int*            bsr_col_ind,
                                           rocsparse_int                   block_dim,
                                           rocsparse_mat_info              info);
/**@}*/

/*! \ingroup level2_module
*  \brief Sparse matrix vector multiplication using the BSR storage format.
*
*  \details
*  \p rocsparse_bsrmv multiplies the scalar \f$\alpha\f$ with a sparse
*  \f$m \times n\f$ matrix, defined in BSR storage format, and the dense vector \f$x\f$ and adds the
*  result to the dense vector \f$y\f$ that is multiplied by the scalar \f$\beta\f$, such that
*  \f[
*    y := \alpha \cdot op(A) \cdot x + \beta \cdot y,
*  \f]
*  with
*  \f[
*    op(A) = \left\{
*    \begin{array}{ll}
*        A,   & \text{if trans == rocsparse_operation_none}
*    \end{array}
*    \right.
*  \f]
*  and where \f$m = mb \times block\_dim\f$ and \f$n= nb \times block\_dim\f$.
*
*  The operation above can be done with or without analysis. Running with analysis might result in better performance
*  when computing the matrix vector product but will also incur a performance cost attributed to the additional analysis step.
*  For this reason, running with analysis makes sense when a user plans on computing the matrix vector product many times and
*  therefore can amortize the analysis cost.
*
*  To run the operation above without analysis, call the \p rocsparse_bsrmv routine while passing
*  \p NULL for the \p info parameter.
*
*  Running the operation with analysis involves two steps. First, create a \ref rocsparse_mat_info object
*  by calling \ref rocsparse_create_mat_info and then pass this to \ref rocsparse_sbsrmv_analysis "rocsparse_Xbsrmv_analysis()",
*  which will perform analysis on the sparsity pattern of the matrix \f$op(A)\f$. Then complete the operation by
*  calling \p rocsparse_bsrmv. The creation of the \p info object and the call to the analysis routine only need to be performed
*  once for a given sparsity pattern, while the computation can be performed repeatedly as long as the sparsity pattern has
*  not changed. After all calls to \p rocsparse_bsrmv have been made, the \p info object can be destroyed with a call to
*  \ref rocsparse_destroy_mat_info.
*
*  When running with analysis, users might want to perform multiple sparse matrix
*  multiplications, with each sparse matrix having a different sparsity pattern. Instead of creating and destroying multiple
*  \ref rocsparse_mat_info objects for each unique sparsity pattern, the user can instead create the \p info object once and
*  then call \ref rocsparse_bsrmv_clear, followed by re-running the analysis in between each sparse matrix multiplication.
*
*  \note
*  This function is non-blocking and executed asynchronously with respect to the host.
*  It can return before the actual computation has finished.
*
*  \note
*  Currently, only \p trans == \ref rocsparse_operation_none is supported.
*
*  \note
*  This routine supports execution in a hipGraph context.
*
*  @param[in]
*  handle      handle to the rocSPARSE library context queue.
*  @param[in]
*  dir         matrix storage of BSR blocks.
*  @param[in]
*  trans       matrix operation type.
*  @param[in]
*  mb          number of block rows of the sparse BSR matrix.
*  @param[in]
*  nb          number of block columns of the sparse BSR matrix.
*  @param[in]
*  nnzb        number of non-zero blocks of the sparse BSR matrix.
*  @param[in]
*  alpha       scalar \f$\alpha\f$.
*  @param[in]
*  descr       descriptor of the sparse BSR matrix. Currently, only
*              \ref rocsparse_matrix_type_general is supported.
*  @param[in]
*  bsr_val     array of \p nnzb blocks of the sparse BSR matrix.
*  @param[in]
*  bsr_row_ptr array of \p mb+1 elements that point to the start of every block row of
*              the sparse BSR matrix.
*  @param[in]
*  bsr_col_ind array of \p nnzb elements containing the block column indices of the sparse
*              BSR matrix.
*  @param[in]
*  block_dim     block dimension of the sparse BSR matrix.
*  @param[in]
*  x           array of \p nb*block_dim elements (\f$op(A) = A\f$) or \p mb*block_dim
*              elements (\f$op(A) = A^T\f$ or \f$op(A) = A^H\f$).
*  @param[in]
*  beta        scalar \f$\beta\f$.
*  @param[inout]
*  y           array of \p mb*block_dim elements (\f$op(A) = A\f$) or \p nb*block_dim
*              elements (\f$op(A) = A^T\f$ or \f$op(A) = A^H\f$).
*  @param[out]
*  info        structure that holds the information collected during the analysis step.
*
*  \retval     rocsparse_status_success the operation completed successfully.
*  \retval     rocsparse_status_invalid_handle the library context was not initialized.
*  \retval     rocsparse_status_invalid_size \p mb, \p nb, \p nnzb, or \p block_dim is
*              invalid.
*  \retval     rocsparse_status_invalid_pointer \p descr, \p alpha, \p bsr_val,
*              \p bsr_row_ind, \p bsr_col_ind, \p x, \p beta, or \p y pointer is invalid.
*  \retval     rocsparse_status_arch_mismatch the device is not supported.
*  \retval     rocsparse_status_not_implemented
*              \p trans != \ref rocsparse_operation_none or
*              \ref rocsparse_matrix_type != \ref rocsparse_matrix_type_general.
*
*  \par Example
*  This example performs a sparse matrix vector multiplication in BSR format.
*  \snippet example_rocsparse_bsrmv.cpp doc example
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_sbsrmv(rocsparse_handle          handle,
                                  rocsparse_direction       dir,
                                  rocsparse_operation       trans,
                                  rocsparse_int             mb,
                                  rocsparse_int             nb,
                                  rocsparse_int             nnzb,
                                  const float*              alpha,
                                  const rocsparse_mat_descr descr,
                                  const float*              bsr_val,
                                  const rocsparse_int*      bsr_row_ptr,
                                  const rocsparse_int*      bsr_col_ind,
                                  rocsparse_int             block_dim,
                                  rocsparse_mat_info        info,
                                  const float*              x,
                                  const float*              beta,
                                  float*                    y);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_dbsrmv(rocsparse_handle          handle,
                                  rocsparse_direction       dir,
                                  rocsparse_operation       trans,
                                  rocsparse_int             mb,
                                  rocsparse_int             nb,
                                  rocsparse_int             nnzb,
                                  const double*             alpha,
                                  const rocsparse_mat_descr descr,
                                  const double*             bsr_val,
                                  const rocsparse_int*      bsr_row_ptr,
                                  const rocsparse_int*      bsr_col_ind,
                                  rocsparse_int             block_dim,
                                  rocsparse_mat_info        info,
                                  const double*             x,
                                  const double*             beta,
                                  double*                   y);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_cbsrmv(rocsparse_handle               handle,
                                  rocsparse_direction            dir,
                                  rocsparse_operation            trans,
                                  rocsparse_int                  mb,
                                  rocsparse_int                  nb,
                                  rocsparse_int                  nnzb,
                                  const rocsparse_float_complex* alpha,
                                  const rocsparse_mat_descr      descr,
                                  const rocsparse_float_complex* bsr_val,
                                  const rocsparse_int*           bsr_row_ptr,
                                  const rocsparse_int*           bsr_col_ind,
                                  rocsparse_int                  block_dim,
                                  rocsparse_mat_info             info,
                                  const rocsparse_float_complex* x,
                                  const rocsparse_float_complex* beta,
                                  rocsparse_float_complex*       y);

ROCSPARSE_EXPORT
rocsparse_status rocsparse_zbsrmv(rocsparse_handle                handle,
                                  rocsparse_direction             dir,
                                  rocsparse_operation             trans,
                                  rocsparse_int                   mb,
                                  rocsparse_int                   nb,
                                  rocsparse_int                   nnzb,
                                  const rocsparse_double_complex* alpha,
                                  const rocsparse_mat_descr       descr,
                                  const rocsparse_double_complex* bsr_val,
                                  const rocsparse_int*            bsr_row_ptr,
                                  const rocsparse_int*            bsr_col_ind,
                                  rocsparse_int                   block_dim,
                                  rocsparse_mat_info              info,
                                  const rocsparse_double_complex* x,
                                  const rocsparse_double_complex* beta,
                                  rocsparse_double_complex*       y);
/**@}*/

/*! \ingroup level2_module
*  \details
*  \p rocsparse_bsrmv_clear deallocates all memory that was allocated by
*  \ref rocsparse_sbsrmv_analysis "rocsparse_Xbsrmv_analysis()". This is especially useful
*  if memory is an issue and the analysis data is not required anymore for further computation,
*  for example, when switching to another sparse matrix format.
*
*  Calling \p rocsparse_bsrmv_clear is optional. All allocated resources will be
*  cleared when the opaque \ref rocsparse_mat_info object is destroyed using
*  \ref rocsparse_destroy_mat_info().
*
*  \note
*  This routine does not support execution in a hipGraph context.
*
*  @param[in]
*  handle      handle to the rocSPARSE library context queue.
*  @param[inout]
*  info        structure that holds the information collected during analysis step.
*
*  \retval     rocsparse_status_success the operation completed successfully.
*  \retval     rocsparse_status_invalid_handle the library context was not initialized.
*  \retval     rocsparse_status_invalid_pointer \p info pointer is invalid.
*  \retval     rocsparse_status_memory_error the buffer for the gathered information
*              could not be deallocated.
*  \retval     rocsparse_status_internal_error an internal error occurred.
* */
ROCSPARSE_EXPORT
rocsparse_status rocsparse_bsrmv_clear(rocsparse_handle handle, rocsparse_mat_info info);

#ifdef __cplusplus
}
#endif

#endif /* ROCSPARSE_BSRMV_H */