NAME

       rte_bbdev_op_ldpc_dec

SYNOPSIS

       #include <rte_bbdev_op.h>

   Data Fields
       struct rte_bbdev_op_data input
       struct rte_bbdev_op_data hard_output
       struct rte_bbdev_op_data soft_output
       struct rte_bbdev_op_data harq_combined_input
       struct rte_bbdev_op_data harq_combined_output
       uint32_t op_flags
       uint8_t rv_index
       uint8_t iter_max
       uint8_t iter_count
       uint8_t basegraph
       uint16_t z_c
       uint16_t n_cb
       uint8_t q_m
       uint16_t n_filler
       uint8_t code_block_mode
       uint16_t k0

Detailed Description

       Operation structure for LDPC decode.

       An operation can be performed on one CB at a time 'CB-mode'. An operation can also be performed on one or
       multiple CBs that logically belong to a TB 'TB-mode' (Currently not supported).

       The input encoded CB data is the Virtual Circular Buffer data stream.

       Each byte in the input circular buffer is the LLR value of each bit of the original CB.

       Hard output is a mandatory capability that all BBDEV PMDs support. This is the decoded CBs (CRC24A/B is
       the last 24-bit in each decoded CB).

       Soft output is an optional capability for BBDEV PMDs. If supported, an LLR rate matched output is
       computed in the soft_output buffer structure. These are A Posteriori Probabilities (APP) LLR samples for
       coded bits.

       HARQ combined output is an optional capability for BBDEV PMDs. If supported, a LLR output is streamed to
       the harq_combined_output buffer.

       HARQ combined input is an optional capability for BBDEV PMDs. If supported, a LLR input is streamed from
       the harq_combined_input buffer.

       The output mbuf data structure is expected to be allocated by the application with enough room for the
       output data.

       Definition at line 506 of file rte_bbdev_op.h.

Field Documentation

   struct rte_bbdev_op_data input
       The Virtual Circular Buffer for this code block, one LLR per bit of the original CB.

       Definition at line 510 of file rte_bbdev_op.h.

   struct rte_bbdev_op_data hard_output
       The hard decisions buffer for the decoded output, size K for each CB

       Definition at line 514 of file rte_bbdev_op.h.

   struct rte_bbdev_op_data soft_output
       The soft LLR output LLR stream buffer - optional

       Definition at line 516 of file rte_bbdev_op.h.

   struct rte_bbdev_op_data harq_combined_input
       The HARQ combined LLR stream input buffer - optional

       Definition at line 518 of file rte_bbdev_op.h.

   struct rte_bbdev_op_data harq_combined_output
       The HARQ combined LLR stream output buffer - optional

       Definition at line 520 of file rte_bbdev_op.h.

   uint32_t op_flags
       Flags from rte_bbdev_op_ldpcdec_flag_bitmasks

       Definition at line 523 of file rte_bbdev_op.h.

   uint8_t rv_index
       Rate matching redundancy version [3GPP TS38.212, section 5.4.2.1]

       Definition at line 528 of file rte_bbdev_op.h.

   uint8_t iter_max
       The maximum number of iterations to perform in decoding CB in this operation - input

       Definition at line 532 of file rte_bbdev_op.h.

   uint8_t iter_count
       The number of iterations that were performed in decoding CB in this decode operation - output

       Definition at line 536 of file rte_bbdev_op.h.

   uint8_t basegraph
       1: LDPC Base graph 1, 2: LDPC Base graph 2. [3GPP TS38.212, section 5.2.2]

       Definition at line 540 of file rte_bbdev_op.h.

   uint16_t z_c
       Zc, LDPC lifting size. [3GPP TS38.212, section 5.2.2]

       Definition at line 544 of file rte_bbdev_op.h.

   uint16_t n_cb
       Ncb, length of the circular buffer in bits. [3GPP TS38.212, section 5.4.2.1]

       Definition at line 548 of file rte_bbdev_op.h.

   uint8_t q_m
       Qm, modulation order {1,2,4,6,8}. [3GPP TS38.212, section 5.4.2.2]

       Definition at line 552 of file rte_bbdev_op.h.

   uint16_t n_filler
       Number of Filler bits, n_filler = K – K’ [3GPP TS38.212 section 5.2.2]

       Definition at line 556 of file rte_bbdev_op.h.

   uint8_t code_block_mode
       [0 - TB : 1 - CB]

       Definition at line 558 of file rte_bbdev_op.h.

   struct rte_bbdev_op_dec_ldpc_cb_params cb_params
       Struct which stores Code Block specific parameters

       Definition at line 561 of file rte_bbdev_op.h.

   struct rte_bbdev_op_dec_ldpc_tb_params tb_params
       Struct which stores Transport Block specific parameters

       Definition at line 563 of file rte_bbdev_op.h.

   uint16_t k0
       Optional k0 Rate matching starting position, overrides rv_index when non null [3GPP TS38.212, section
       5.4.2.1]

       Definition at line 568 of file rte_bbdev_op.h.

Author

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DPDK                                             Version 24.11.2                        rte_bbdev_op_ldpc_dec(3)