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/*! \file */
/* ************************************************************************
* Copyright (C) 2023 Advanced Micro Devices, Inc. All rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* ************************************************************************ */
#ifndef ROCSPARSE_CSRSV_H
#define ROCSPARSE_CSRSV_H
#include "../../rocsparse-types.h"
#include "rocsparse/rocsparse-export.h"
#ifdef __cplusplus
extern "C" {
#endif
/*! \ingroup level2_module
* \brief Sparse triangular solve using CSR storage format
*
* \details
* \p rocsparse_csrsv_zero_pivot returns \ref rocsparse_status_zero_pivot, if either a
* structural or numerical zero has been found during rocsparse_scsrsv_solve(),
* rocsparse_dcsrsv_solve(), rocsparse_ccsrsv_solve() or rocsparse_zcsrsv_solve()
* computation. The first zero pivot \f$j\f$ at \f$A_{j,j}\f$ is stored in \p position,
* using same index base as the CSR matrix.
*
* \p position can be in host or device memory. If no zero pivot has been found,
* \p position is set to -1 and \ref rocsparse_status_success is returned instead.
*
* \note \p rocsparse_csrsv_zero_pivot is a blocking function. It might influence
* performance negatively.
*
* \note
* This routine does not support execution in a hipGraph context.
*
* @param[in]
* handle handle to the rocsparse library context queue.
* @param[in]
* descr descriptor of the sparse CSR matrix.
* @param[in]
* info structure that holds the information collected during the analysis step.
* @param[inout]
* position pointer to zero pivot \f$j\f$, can be in host or device memory.
*
* \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 or \p position pointer is
* invalid.
* \retval rocsparse_status_internal_error an internal error occurred.
* \retval rocsparse_status_zero_pivot zero pivot has been found.
*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_csrsv_zero_pivot(rocsparse_handle handle,
const rocsparse_mat_descr descr,
rocsparse_mat_info info,
rocsparse_int* position);
/*! \ingroup level2_module
* \brief Sparse triangular solve using CSR storage format
*
* \details
* \p rocsparse_csrsv_buffer_size returns the size of the temporary storage buffer that
* is required by rocsparse_scsrsv_analysis(), rocsparse_dcsrsv_analysis(),
* rocsparse_ccsrsv_analysis(), rocsparse_zcsrsv_analysis(), rocsparse_scsrsv_solve(),
* rocsparse_dcsrsv_solve(), rocsparse_ccsrsv_solve() and rocsparse_zcsrsv_solve(). The
* temporary storage buffer must be allocated by the user. The size of the temporary
* storage buffer is identical to the size returned by rocsparse_scsrilu0_buffer_size(),
* rocsparse_dcsrilu0_buffer_size(), rocsparse_ccsrilu0_buffer_size() and
* rocsparse_zcsrilu0_buffer_size() if the matrix sparsity pattern is identical. The
* user allocated buffer can thus be shared between subsequent calls to those functions.
*
* \note
* This function is non blocking and executed asynchronously with respect to the host.
* It may return before the actual computation has finished.
*
* \note
* This routine supports execution in a hipGraph context.
*
* @param[in]
* handle handle to the rocsparse library context queue.
* @param[in]
* trans matrix operation type.
* @param[in]
* m number of rows of the sparse CSR matrix.
* @param[in]
* nnz number of non-zero entries of the sparse CSR matrix.
* @param[in]
* descr descriptor of the sparse CSR matrix.
* @param[in]
* csr_val array of \p nnz elements of the sparse CSR matrix.
* @param[in]
* csr_row_ptr array of \p m+1 elements that point to the start of every row of the
* sparse CSR matrix.
* @param[in]
* csr_col_ind array of \p nnz elements containing the column indices of the sparse
* CSR matrix.
* @param[out]
* info structure that holds the information collected during the analysis step.
* @param[out]
* buffer_size number of bytes of the temporary storage buffer required by
* rocsparse_scsrsv_analysis(), rocsparse_dcsrsv_analysis(),
* rocsparse_ccsrsv_analysis(), rocsparse_zcsrsv_analysis(),
* rocsparse_scsrsv_solve(), rocsparse_dcsrsv_solve(),
* rocsparse_ccsrsv_solve() and rocsparse_zcsrsv_solve().
*
* \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 m or \p nnz is invalid.
* \retval rocsparse_status_invalid_pointer \p descr, \p csr_val, \p csr_row_ptr,
* \p csr_col_ind, \p info or \p buffer_size pointer is invalid.
* \retval rocsparse_status_internal_error an internal error occurred.
* \retval rocsparse_status_not_implemented
* \p trans == \ref rocsparse_operation_conjugate_transpose or
* \ref rocsparse_matrix_type != \ref rocsparse_matrix_type_general.
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_scsrsv_buffer_size(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const float* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
size_t* buffer_size);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_dcsrsv_buffer_size(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const double* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
size_t* buffer_size);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_ccsrsv_buffer_size(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const rocsparse_float_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
size_t* buffer_size);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_zcsrsv_buffer_size(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const rocsparse_double_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
size_t* buffer_size);
/**@}*/
/*! \ingroup level2_module
* \brief Sparse triangular solve using CSR storage format
*
* \details
* \p rocsparse_csrsv_analysis performs the analysis step for rocsparse_scsrsv_solve(),
* rocsparse_dcsrsv_solve(), rocsparse_ccsrsv_solve() and rocsparse_zcsrsv_solve(). It
* is expected that this function will be executed only once for a given matrix and
* particular operation type. The analysis meta data can be cleared by
* rocsparse_csrsv_clear().
*
* \p rocsparse_csrsv_analysis can share its meta data with
* rocsparse_scsrsm_analysis(), rocsparse_dcsrsm_analysis(),
* rocsparse_ccsrsm_analysis(), rocsparse_zcsrsm_analysis(),
* rocsparse_scsrilu0_analysis(), rocsparse_dcsrilu0_analysis(),
* rocsparse_ccsrilu0_analysis(), rocsparse_zcsrilu0_analysis(),
* rocsparse_scsric0_analysis(), rocsparse_dcsric0_analysis(),
* rocsparse_ccsric0_analysis() and rocsparse_zcsric0_analysis(). Selecting
* \ref rocsparse_analysis_policy_reuse policy can greatly improve computation
* performance of meta data. However, the user need to make sure that the sparsity
* pattern remains unchanged. If this cannot be assured,
* \ref rocsparse_analysis_policy_force has to be used.
*
* \note
* If the matrix sparsity pattern changes, the gathered information will become invalid.
*
* \note
* This function is blocking with respect to the host.
*
* \note
* This routine does not support execution in a hipGraph context.
*
* @param[in]
* handle handle to the rocsparse library context queue.
* @param[in]
* trans matrix operation type.
* @param[in]
* m number of rows of the sparse CSR matrix.
* @param[in]
* nnz number of non-zero entries of the sparse CSR matrix.
* @param[in]
* descr descriptor of the sparse CSR matrix.
* @param[in]
* csr_val array of \p nnz elements of the sparse CSR matrix.
* @param[in]
* csr_row_ptr array of \p m+1 elements that point to the start of every row of the
* sparse CSR matrix.
* @param[in]
* csr_col_ind array of \p nnz elements containing the column indices of the sparse
* CSR matrix.
* @param[out]
* info structure that holds the information collected during
* the analysis step.
* @param[in]
* analysis \ref rocsparse_analysis_policy_reuse or
* \ref rocsparse_analysis_policy_force.
* @param[in]
* solve \ref rocsparse_solve_policy_auto.
* @param[in]
* temp_buffer temporary storage buffer allocated by the user.
*
* \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 m or \p nnz is invalid.
* \retval rocsparse_status_invalid_pointer \p descr, \p csr_row_ptr,
* \p csr_col_ind, \p info or \p temp_buffer pointer is invalid.
* \retval rocsparse_status_internal_error an internal error occurred.
* \retval rocsparse_status_not_implemented
* \p trans == \ref rocsparse_operation_conjugate_transpose or
* \ref rocsparse_matrix_type != \ref rocsparse_matrix_type_general.
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_scsrsv_analysis(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const float* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
rocsparse_analysis_policy analysis,
rocsparse_solve_policy solve,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_dcsrsv_analysis(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const double* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
rocsparse_analysis_policy analysis,
rocsparse_solve_policy solve,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_ccsrsv_analysis(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const rocsparse_float_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
rocsparse_analysis_policy analysis,
rocsparse_solve_policy solve,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_zcsrsv_analysis(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_mat_descr descr,
const rocsparse_double_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
rocsparse_analysis_policy analysis,
rocsparse_solve_policy solve,
void* temp_buffer);
/**@}*/
/*! \ingroup level2_module
* \brief Sparse triangular solve using CSR storage format
*
* \details
* \p rocsparse_csrsv_clear deallocates all memory that was allocated by
* rocsparse_scsrsv_analysis(), rocsparse_dcsrsv_analysis(), rocsparse_ccsrsv_analysis()
* or rocsparse_zcsrsv_analysis(). This is especially useful, if memory is an issue and
* the analysis data is not required for further computation, e.g. when switching to
* another sparse matrix format. Calling \p rocsparse_csrsv_clear is optional. All
* allocated resources will be cleared, when the opaque \ref rocsparse_mat_info struct
* is destroyed using 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[in]
* descr descriptor of the sparse CSR matrix.
* @param[inout]
* 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_pointer \p info pointer is invalid.
* \retval rocsparse_status_memory_error the buffer holding the meta data could not
* be deallocated.
* \retval rocsparse_status_internal_error an internal error occurred.
*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_csrsv_clear(rocsparse_handle handle,
const rocsparse_mat_descr descr,
rocsparse_mat_info info);
/*! \ingroup level2_module
* \brief Sparse triangular solve using CSR storage format
*
* \details
* \p rocsparse_csrsv_solve solves a sparse triangular linear system of a sparse
* \f$m \times m\f$ matrix, defined in CSR storage format, a dense solution vector
* \f$y\f$ and the right-hand side \f$x\f$ that is multiplied by \f$\alpha\f$, such that
* \f[
* op(A) \cdot y = \alpha \cdot x,
* \f]
* with
* \f[
* op(A) = \left\{
* \begin{array}{ll}
* A, & \text{if trans == rocsparse_operation_none} \\
* A^T, & \text{if trans == rocsparse_operation_transpose} \\
* A^H, & \text{if trans == rocsparse_operation_conjugate_transpose}
* \end{array}
* \right.
* \f]
*
* \p rocsparse_csrsv_solve requires a user allocated temporary buffer. Its size is
* returned by rocsparse_scsrsv_buffer_size(), rocsparse_dcsrsv_buffer_size(),
* rocsparse_ccsrsv_buffer_size() or rocsparse_zcsrsv_buffer_size(). Furthermore,
* analysis meta data is required. It can be obtained by rocsparse_scsrsv_analysis(),
* rocsparse_dcsrsv_analysis(), rocsparse_ccsrsv_analysis() or
* rocsparse_zcsrsv_analysis(). \p rocsparse_csrsv_solve reports the first zero pivot
* (either numerical or structural zero). The zero pivot status can be checked calling
* rocsparse_csrsv_zero_pivot(). If
* \ref rocsparse_diag_type == \ref rocsparse_diag_type_unit, no zero pivot will be
* reported, even if \f$A_{j,j} = 0\f$ for some \f$j\f$.
*
* \note
* The sparse CSR matrix has to be sorted. This can be achieved by calling
* rocsparse_csrsort().
*
* \note
* This function is non blocking and executed asynchronously with respect to the host.
* It may return before the actual computation has finished.
*
* \note
* Currently, only \p trans == \ref rocsparse_operation_none and
* \p trans == \ref rocsparse_operation_transpose is supported.
*
* \note
* This routine supports execution in a hipGraph context.
*
* @param[in]
* handle handle to the rocsparse library context queue.
* @param[in]
* trans matrix operation type.
* @param[in]
* m number of rows of the sparse CSR matrix.
* @param[in]
* nnz number of non-zero entries of the sparse CSR matrix.
* @param[in]
* alpha scalar \f$\alpha\f$.
* @param[in]
* descr descriptor of the sparse CSR matrix.
* @param[in]
* csr_val array of \p nnz elements of the sparse CSR matrix.
* @param[in]
* csr_row_ptr array of \p m+1 elements that point to the start
* of every row of the sparse CSR matrix.
* @param[in]
* csr_col_ind array of \p nnz elements containing the column indices of the sparse
* CSR matrix.
* @param[in]
* info structure that holds the information collected during the analysis step.
* @param[in]
* x array of \p m elements, holding the right-hand side.
* @param[out]
* y array of \p m elements, holding the solution.
* @param[in]
* policy \ref rocsparse_solve_policy_auto.
* @param[in]
* temp_buffer temporary storage buffer allocated by the user.
*
* \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 m or \p nnz is invalid.
* \retval rocsparse_status_invalid_pointer \p descr, \p alpha, \p csr_val,
* \p csr_row_ptr, \p csr_col_ind, \p x or \p y pointer is invalid.
* \retval rocsparse_status_arch_mismatch the device is not supported.
* \retval rocsparse_status_internal_error an internal error occurred.
* \retval rocsparse_status_not_implemented
* \p trans == \ref rocsparse_operation_conjugate_transpose or
* \ref rocsparse_matrix_type != \ref rocsparse_matrix_type_general.
*
* \par Example
* Consider the lower triangular \f$m \times m\f$ matrix \f$L\f$, stored in CSR
* storage format with unit diagonal. The following example solves \f$L \cdot y = x\f$.
* \code{.c}
* // Create rocSPARSE handle
* rocsparse_handle handle;
* rocsparse_create_handle(&handle);
*
* // Create matrix descriptor
* rocsparse_mat_descr descr;
* rocsparse_create_mat_descr(&descr);
* rocsparse_set_mat_fill_mode(descr, rocsparse_fill_mode_lower);
* rocsparse_set_mat_diag_type(descr, rocsparse_diag_type_unit);
*
* // Create matrix info structure
* rocsparse_mat_info info;
* rocsparse_create_mat_info(&info);
*
* // Obtain required buffer size
* size_t buffer_size;
* rocsparse_dcsrsv_buffer_size(handle,
* rocsparse_operation_none,
* m,
* nnz,
* descr,
* csr_val,
* csr_row_ptr,
* csr_col_ind,
* info,
* &buffer_size);
*
* // Allocate temporary buffer
* void* temp_buffer;
* hipMalloc(&temp_buffer, buffer_size);
*
* // Perform analysis step
* rocsparse_dcsrsv_analysis(handle,
* rocsparse_operation_none,
* m,
* nnz,
* descr,
* csr_val,
* csr_row_ptr,
* csr_col_ind,
* info,
* rocsparse_analysis_policy_reuse,
* rocsparse_solve_policy_auto,
* temp_buffer);
*
* // Solve Ly = x
* rocsparse_dcsrsv_solve(handle,
* rocsparse_operation_none,
* m,
* nnz,
* &alpha,
* descr,
* csr_val,
* csr_row_ptr,
* csr_col_ind,
* info,
* x,
* y,
* rocsparse_solve_policy_auto,
* temp_buffer);
*
* // No zero pivot should be found, with L having unit diagonal
*
* // Clean up
* hipFree(temp_buffer);
* rocsparse_destroy_mat_info(info);
* rocsparse_destroy_mat_descr(descr);
* rocsparse_destroy_handle(handle);
* \endcode
*/
/**@{*/
ROCSPARSE_EXPORT
rocsparse_status rocsparse_scsrsv_solve(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const float* alpha,
const rocsparse_mat_descr descr,
const float* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
const float* x,
float* y,
rocsparse_solve_policy policy,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_dcsrsv_solve(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const double* alpha,
const rocsparse_mat_descr descr,
const double* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
const double* x,
double* y,
rocsparse_solve_policy policy,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_ccsrsv_solve(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_float_complex* alpha,
const rocsparse_mat_descr descr,
const rocsparse_float_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
const rocsparse_float_complex* x,
rocsparse_float_complex* y,
rocsparse_solve_policy policy,
void* temp_buffer);
ROCSPARSE_EXPORT
rocsparse_status rocsparse_zcsrsv_solve(rocsparse_handle handle,
rocsparse_operation trans,
rocsparse_int m,
rocsparse_int nnz,
const rocsparse_double_complex* alpha,
const rocsparse_mat_descr descr,
const rocsparse_double_complex* csr_val,
const rocsparse_int* csr_row_ptr,
const rocsparse_int* csr_col_ind,
rocsparse_mat_info info,
const rocsparse_double_complex* x,
rocsparse_double_complex* y,
rocsparse_solve_policy policy,
void* temp_buffer);
/**@}*/
#ifdef __cplusplus
}
#endif
#endif /* ROCSPARSE_CSRSV_H */
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