table of contents
| rte_bbdev_op_turbo_dec(3) | DPDK | rte_bbdev_op_turbo_dec(3) |
NAME¶
rte_bbdev_op_turbo_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
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.
Definition at line 430 of file rte_bbdev_op.h.
Field Documentation¶
struct rte_bbdev_op_data input¶
The Virtual Circular Buffer, wk, size 3*Kpi for each CB
Definition at line 397 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 397 of file rte_bbdev_op.h.
struct rte_bbdev_op_data soft_output¶
The soft LLR output buffer - optional
Definition at line 397 of file rte_bbdev_op.h.
uint32_t op_flags¶
Flags from rte_bbdev_op_td_flag_bitmasks
Definition at line 441 of file rte_bbdev_op.h.
uint8_t rv_index¶
Rv index for rate matching [0:3]
Definition at line 444 of file rte_bbdev_op.h.
uint8_t iter_min¶
The minimum number of iterations to perform in decoding all CBs in this operation - input
Definition at line 448 of file rte_bbdev_op.h.
uint8_t iter_max¶
The maximum number of iterations to perform in decoding all CBs in this operation - input
Definition at line 452 of file rte_bbdev_op.h.
uint8_t iter_count¶
The maximum number of iterations that were performed in decoding all CBs in this decode operation - output
Definition at line 456 of file rte_bbdev_op.h.
uint8_t ext_scale¶
5 bit extrinsic scale (scale factor on extrinsic info)
Definition at line 458 of file rte_bbdev_op.h.
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 462 of file rte_bbdev_op.h.
uint8_t code_block_mode¶
[0 - TB : 1 - CB]
Definition at line 465 of file rte_bbdev_op.h.
struct rte_bbdev_op_dec_turbo_cb_params cb_params¶
Struct which stores Code Block specific parameters
Definition at line 465 of file rte_bbdev_op.h.
struct rte_bbdev_op_dec_turbo_tb_params tb_params¶
Struct which stores Transport Block specific parameters
Definition at line 465 of file rte_bbdev_op.h.
Author¶
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| Fri Dec 15 2023 | Version 23.11.0 |