DPDK  19.11.14-rc1
Data Fields
rte_bbdev_op_turbo_dec Struct Reference

#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
 
uint32_t op_flags
 
uint8_t rv_index
 
uint8_t iter_min:4
 
uint8_t iter_max:4
 
uint8_t iter_count
 
uint8_t ext_scale
 
uint8_t num_maps
 
uint8_t code_block_mode
 
struct rte_bbdev_op_dec_turbo_cb_params cb_params
 
struct rte_bbdev_op_dec_turbo_tb_params tb_params
 

Detailed Description

Operation structure for Turbo decode. An operation can be performed on one CB at a time "CB-mode". An operation can be performed on one or multiple CBs that logically belong to one TB "TB-mode". The provided K size parameter of the CB is its size coming from the decode operation. CRC24A/B check is requested by the application by setting the flag RTE_BBDEV_TURBO_CRC_TYPE_24B for CRC24B check or CRC24A otherwise. In TB-mode, BBDEV concatenates the decoded CBs one next to the other with relevant CRC24B in between.

The input encoded CB data is the Virtual Circular Buffer data stream, wk, with the null padding included as described in 3GPP TS 36.212 section 5.1.4.1.2 and shown in 3GPP TS 36.212 section 5.1.4.1 Figure 5.1.4-1. The size of the virtual circular buffer is 3*Kpi, where Kpi is the 32 byte aligned value of K, as specified in 3GPP TS 36.212 section 5.1.4.1.1.

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 of K sizes (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.

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

Examples:
examples/bbdev_app/main.c.

Definition at line 358 of file rte_bbdev_op.h.

Field Documentation

◆ input

struct rte_bbdev_op_data input

The Virtual Circular Buffer, wk, size 3*Kpi for each CB

Examples:
examples/bbdev_app/main.c.

Definition at line 360 of file rte_bbdev_op.h.

◆ hard_output

struct rte_bbdev_op_data hard_output

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

Examples:
examples/bbdev_app/main.c.

Definition at line 364 of file rte_bbdev_op.h.

◆ soft_output

struct rte_bbdev_op_data soft_output

The soft LLR output buffer - optional

Definition at line 366 of file rte_bbdev_op.h.

◆ op_flags

uint32_t op_flags

Flags from rte_bbdev_op_td_flag_bitmasks

Examples:
examples/bbdev_app/main.c.

Definition at line 369 of file rte_bbdev_op.h.

◆ rv_index

uint8_t rv_index

Rv index for rate matching [0:3]

Definition at line 372 of file rte_bbdev_op.h.

◆ iter_min

uint8_t iter_min

The minimum number of iterations to perform in decoding all CBs in this operation - input

Definition at line 376 of file rte_bbdev_op.h.

◆ iter_max

uint8_t iter_max

The maximum number of iterations to perform in decoding all CBs in this operation - input

Definition at line 380 of file rte_bbdev_op.h.

◆ iter_count

uint8_t iter_count

The maximum number of iterations that were performed in decoding all CBs in this decode operation - output

Definition at line 384 of file rte_bbdev_op.h.

◆ ext_scale

uint8_t ext_scale

5 bit extrinsic scale (scale factor on extrinsic info)

Definition at line 386 of file rte_bbdev_op.h.

◆ num_maps

uint8_t num_maps

Number of MAP engines to use in decode, must be power of 2 (or 0 to auto-select)

Definition at line 390 of file rte_bbdev_op.h.

◆ code_block_mode

uint8_t code_block_mode

[0 - TB : 1 - CB]

Examples:
examples/bbdev_app/main.c.

Definition at line 393 of file rte_bbdev_op.h.

◆ cb_params

Struct which stores Code Block specific parameters

Examples:
examples/bbdev_app/main.c.

Definition at line 396 of file rte_bbdev_op.h.

◆ tb_params

Struct which stores Transport Block specific parameters

Definition at line 398 of file rte_bbdev_op.h.


The documentation for this struct was generated from the following file: