Function cusparseCreateBsr 

pub unsafe extern "C" fn cusparseCreateBsr(
    spMatDescr: *mut cusparseSpMatDescr_t,
    brows: i64,
    bcols: i64,
    bnnz: i64,
    rowBlockSize: i64,
    colBlockSize: i64,
    bsrRowOffsets: *mut c_void,
    bsrColInd: *mut c_void,
    bsrValues: *mut c_void,
    bsrRowOffsetsType: cusparseIndexType_t,
    bsrColIndType: cusparseIndexType_t,
    idxBase: cusparseIndexBase_t,
    valueType: cudaDataType,
    order: cusparseOrder_t,
) -> cusparseStatus_t

This function initializes the sparse matrix descriptor spMatDescr for the Block Compressed Row (BSR) format.

cusparseCreateBsr has the following constraints:

• bsrRowOffsets, bsrColInd, and bsrValues must be aligned to the size of the datatypes specified by bsrRowOffsetsType, bsrColIndType, and valueType, respectively. See cudaDataType_t for the description of the datatypes.

Parameters

• spMatDescr: Sparse matrix descriptor.
• brows: Number of block rows of the sparse matrix.
• bcols: Number of block columns of the sparse matrix.
• bnnz: Number of blocks of the sparse matrix.
• rowBlockSize: Number of rows of each block.
• colBlockSize: Number of columns of each block.
• bsrRowOffsets: Block row offsets of the sparse matrix. Array of size brows + 1.
• bsrColInd: Block column indices of the sparse matrix. Array of size bnnz.
• bsrValues: Values of the sparse matrix. Array of size bnnz * rowBlockSize * colBlockSize.
• bsrRowOffsetsType: Data type of bsrRowOffsets.
• bsrColIndType: Data type of bsrColInd.
• idxBase: Base index of bsrRowOffsets and bsrColInd.
• valueType: Datatype of bsrValues.
• order: Enumerator specifying the memory layout of values in each block.