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fix(nrLDPC_coding_t2): HARQ combined offset

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The offset provided for each code block in the HARQ combined input and output buffer shall not be above 512.
A modulus was performed on the offset of the TB in the buffer to avoid this situation.
But the offset of the code block was added afterward so that the total offset was sometimes going above 512.
This commit performs the modulus after adding the code block offset.
This commit is contained in:
Romain Beurdouche
2025-01-17 10:55:03 +00:00
parent 10e07bc67f
commit 0d3008c244
1 changed files with 12 additions and 2 deletions
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openair1/PHY/CODING/nrLDPC_coding/nrLDPC_coding_t2/nrLDPC_coding_t2.c
+12 -2
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@@ -559,8 +559,18 @@ set_ldpc_dec_op(struct rte_bbdev_dec_op **ops,
ops[j]->ldpc_dec.op_flags |= RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK;
}
ops[j]->ldpc_dec.code_block_mode = 1;
ops[j]->ldpc_dec.harq_combined_input.offset = (((nrLDPC_slot_decoding_parameters->TBs[h].harq_unique_pid * NR_LDPC_MAX_NUM_CB) % HARQ_CODEBLOCK_ID_MAX) + i) * LDPC_MAX_CB_SIZE;
ops[j]->ldpc_dec.harq_combined_output.offset = (((nrLDPC_slot_decoding_parameters->TBs[h].harq_unique_pid * NR_LDPC_MAX_NUM_CB) % HARQ_CODEBLOCK_ID_MAX) + i) * LDPC_MAX_CB_SIZE;
// Calculate offset in the HARQ combined buffers
// Unique segment offset
uint32_t segment_offset = (nrLDPC_slot_decoding_parameters->TBs[h].harq_unique_pid * NR_LDPC_MAX_NUM_CB) + i;
// Prune to avoid shooting above maximum id
uint32_t pruned_segment_offset = segment_offset % HARQ_CODEBLOCK_ID_MAX;
// Segment offset to byte offset
uint32_t harq_combined_offset = pruned_segment_offset * LDPC_MAX_CB_SIZE;
ops[j]->ldpc_dec.harq_combined_input.offset = harq_combined_offset;
ops[j]->ldpc_dec.harq_combined_output.offset = harq_combined_offset;
if (bufs->hard_outputs != NULL)
ops[j]->ldpc_dec.hard_output = bufs->hard_outputs[start_idx + j];
if (bufs->inputs != NULL)