New implementation for some of the FEC features
specific to the VRB2 variant.

Signed-off-by: Nicolas Chautru <nicolas.chau...@intel.com>
---
 drivers/baseband/acc/rte_vrb_pmd.c | 567 ++++++++++++++++++++++++++++-
 1 file changed, 548 insertions(+), 19 deletions(-)

diff --git a/drivers/baseband/acc/rte_vrb_pmd.c 
b/drivers/baseband/acc/rte_vrb_pmd.c
index 48e779ce77..93add82947 100644
--- a/drivers/baseband/acc/rte_vrb_pmd.c
+++ b/drivers/baseband/acc/rte_vrb_pmd.c
@@ -1235,6 +1235,94 @@ vrb_dev_info_get(struct rte_bbdev *dev, struct 
rte_bbdev_driver_info *dev_info)
        };
 
        static const struct rte_bbdev_op_cap vrb2_bbdev_capabilities[] = {
+               {
+                       .type = RTE_BBDEV_OP_TURBO_DEC,
+                       .cap.turbo_dec = {
+                               .capability_flags =
+                                       RTE_BBDEV_TURBO_SUBBLOCK_DEINTERLEAVE |
+                                       RTE_BBDEV_TURBO_CRC_TYPE_24B |
+                                       RTE_BBDEV_TURBO_DEC_CRC_24B_DROP |
+                                       RTE_BBDEV_TURBO_EQUALIZER |
+                                       RTE_BBDEV_TURBO_SOFT_OUT_SATURATE |
+                                       RTE_BBDEV_TURBO_HALF_ITERATION_EVEN |
+                                       RTE_BBDEV_TURBO_CONTINUE_CRC_MATCH |
+                                       RTE_BBDEV_TURBO_SOFT_OUTPUT |
+                                       RTE_BBDEV_TURBO_EARLY_TERMINATION |
+                                       RTE_BBDEV_TURBO_DEC_INTERRUPTS |
+                                       RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN |
+                                       RTE_BBDEV_TURBO_NEG_LLR_1_BIT_SOFT_OUT |
+                                       RTE_BBDEV_TURBO_MAP_DEC |
+                                       RTE_BBDEV_TURBO_DEC_TB_CRC_24B_KEEP |
+                                       RTE_BBDEV_TURBO_DEC_SCATTER_GATHER,
+                               .max_llr_modulus = INT8_MAX,
+                               .num_buffers_src =
+                                               RTE_BBDEV_TURBO_MAX_CODE_BLOCKS,
+                               .num_buffers_hard_out =
+                                               RTE_BBDEV_TURBO_MAX_CODE_BLOCKS,
+                               .num_buffers_soft_out =
+                                               RTE_BBDEV_TURBO_MAX_CODE_BLOCKS,
+                       }
+               },
+               {
+                       .type = RTE_BBDEV_OP_TURBO_ENC,
+                       .cap.turbo_enc = {
+                               .capability_flags =
+                                       RTE_BBDEV_TURBO_CRC_24B_ATTACH |
+                                       RTE_BBDEV_TURBO_RV_INDEX_BYPASS |
+                                       RTE_BBDEV_TURBO_RATE_MATCH |
+                                       RTE_BBDEV_TURBO_ENC_INTERRUPTS |
+                                       RTE_BBDEV_TURBO_ENC_SCATTER_GATHER,
+                               .num_buffers_src =
+                                               RTE_BBDEV_TURBO_MAX_CODE_BLOCKS,
+                               .num_buffers_dst =
+                                               RTE_BBDEV_TURBO_MAX_CODE_BLOCKS,
+                       }
+               },
+               {
+                       .type   = RTE_BBDEV_OP_LDPC_ENC,
+                       .cap.ldpc_enc = {
+                               .capability_flags =
+                                       RTE_BBDEV_LDPC_RATE_MATCH |
+                                       RTE_BBDEV_LDPC_CRC_24B_ATTACH |
+                                       RTE_BBDEV_LDPC_INTERLEAVER_BYPASS |
+                                       RTE_BBDEV_LDPC_ENC_INTERRUPTS |
+                                       RTE_BBDEV_LDPC_ENC_SCATTER_GATHER |
+                                       RTE_BBDEV_LDPC_ENC_CONCATENATION,
+                               .num_buffers_src =
+                                               RTE_BBDEV_LDPC_MAX_CODE_BLOCKS,
+                               .num_buffers_dst =
+                                               RTE_BBDEV_LDPC_MAX_CODE_BLOCKS,
+                       }
+               },
+               {
+                       .type   = RTE_BBDEV_OP_LDPC_DEC,
+                       .cap.ldpc_dec = {
+                       .capability_flags =
+                               RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK |
+                               RTE_BBDEV_LDPC_CRC_TYPE_24B_DROP |
+                               RTE_BBDEV_LDPC_CRC_TYPE_24A_CHECK |
+                               RTE_BBDEV_LDPC_CRC_TYPE_16_CHECK |
+                               RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE |
+                               RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE |
+                               RTE_BBDEV_LDPC_ITERATION_STOP_ENABLE |
+                               RTE_BBDEV_LDPC_DEINTERLEAVER_BYPASS |
+                               RTE_BBDEV_LDPC_DEC_SCATTER_GATHER |
+                               RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION |
+                               RTE_BBDEV_LDPC_HARQ_4BIT_COMPRESSION |
+                               RTE_BBDEV_LDPC_LLR_COMPRESSION |
+                               RTE_BBDEV_LDPC_SOFT_OUT_ENABLE |
+                               RTE_BBDEV_LDPC_SOFT_OUT_RM_BYPASS |
+                               RTE_BBDEV_LDPC_SOFT_OUT_DEINTERLEAVER_BYPASS |
+                               RTE_BBDEV_LDPC_DEC_INTERRUPTS,
+                       .llr_size = 8,
+                       .llr_decimals = 2,
+                       .num_buffers_src =
+                                       RTE_BBDEV_LDPC_MAX_CODE_BLOCKS,
+                       .num_buffers_hard_out =
+                                       RTE_BBDEV_LDPC_MAX_CODE_BLOCKS,
+                       .num_buffers_soft_out = 0,
+                       }
+               },
                RTE_BBDEV_END_OF_CAPABILITIES_LIST()
        };
 
@@ -1774,6 +1862,141 @@ vrb1_dma_desc_ld_fill(struct rte_bbdev_dec_op *op,
        return 0;
 }
 
+/* Fill in a frame control word for LDPC decoding. */
+static inline void
+vrb2_fcw_ld_fill(struct rte_bbdev_dec_op *op, struct acc_fcw_ld *fcw,
+               union acc_harq_layout_data *harq_layout)
+{
+       uint16_t harq_out_length, harq_in_length, ncb_p, k0_p, parity_offset;
+       uint32_t harq_index;
+       uint32_t l;
+
+       fcw->qm = op->ldpc_dec.q_m;
+       fcw->nfiller = op->ldpc_dec.n_filler;
+       fcw->BG = (op->ldpc_dec.basegraph - 1);
+       fcw->Zc = op->ldpc_dec.z_c;
+       fcw->ncb = op->ldpc_dec.n_cb;
+       fcw->k0 = get_k0(fcw->ncb, fcw->Zc, op->ldpc_dec.basegraph,
+                       op->ldpc_dec.rv_index);
+       if (op->ldpc_dec.code_block_mode == RTE_BBDEV_CODE_BLOCK)
+               fcw->rm_e = op->ldpc_dec.cb_params.e;
+       else
+               fcw->rm_e = (op->ldpc_dec.tb_params.r <
+                               op->ldpc_dec.tb_params.cab) ?
+                                               op->ldpc_dec.tb_params.ea :
+                                               op->ldpc_dec.tb_params.eb;
+
+       if (unlikely(check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE) &&
+                       (op->ldpc_dec.harq_combined_input.length == 0))) {
+               rte_bbdev_log(WARNING, "Null HARQ input size provided");
+               /* Disable HARQ input in that case to carry forward. */
+               op->ldpc_dec.op_flags ^= RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE;
+       }
+       if (unlikely(fcw->rm_e == 0)) {
+               rte_bbdev_log(WARNING, "Null E input provided");
+               fcw->rm_e = 2;
+       }
+
+       fcw->hcin_en = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE);
+       fcw->hcout_en = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE);
+       fcw->crc_select = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK);
+       fcw->so_en = check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_SOFT_OUT_ENABLE);
+       fcw->so_bypass_intlv = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_SOFT_OUT_DEINTERLEAVER_BYPASS);
+       fcw->so_bypass_rm = check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_SOFT_OUT_RM_BYPASS);
+       fcw->bypass_dec = 0;
+       fcw->bypass_intlv = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_DEINTERLEAVER_BYPASS);
+       if (op->ldpc_dec.q_m == 1) {
+               fcw->bypass_intlv = 1;
+               fcw->qm = 2;
+       }
+       if (check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION)) {
+               fcw->hcin_decomp_mode = 1;
+               fcw->hcout_comp_mode = 1;
+       } else if (check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_HARQ_4BIT_COMPRESSION)) {
+               fcw->hcin_decomp_mode = 4;
+               fcw->hcout_comp_mode = 4;
+       } else {
+               fcw->hcin_decomp_mode = 0;
+               fcw->hcout_comp_mode = 0;
+       }
+
+       fcw->llr_pack_mode = check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_LLR_COMPRESSION);
+       harq_index = hq_index(op->ldpc_dec.harq_combined_output.offset);
+       if (fcw->hcin_en > 0) {
+               harq_in_length = op->ldpc_dec.harq_combined_input.length;
+               if (fcw->hcin_decomp_mode == 1)
+                       harq_in_length = harq_in_length * 8 / 6;
+               else if (fcw->hcin_decomp_mode == 4)
+                       harq_in_length = harq_in_length * 2;
+               harq_in_length = RTE_MIN(harq_in_length, op->ldpc_dec.n_cb
+                               - op->ldpc_dec.n_filler);
+               harq_in_length = RTE_ALIGN_CEIL(harq_in_length, 64);
+               fcw->hcin_size0 = harq_in_length;
+               fcw->hcin_offset = 0;
+               fcw->hcin_size1 = 0;
+       } else {
+               fcw->hcin_size0 = 0;
+               fcw->hcin_offset = 0;
+               fcw->hcin_size1 = 0;
+       }
+
+       fcw->itmax = op->ldpc_dec.iter_max;
+       fcw->so_it = op->ldpc_dec.iter_max;
+       fcw->itstop = check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_ITERATION_STOP_ENABLE);
+       fcw->cnu_algo = ACC_ALGO_MSA;
+       fcw->synd_precoder = fcw->itstop;
+
+       fcw->minsum_offset = 1;
+       fcw->dec_llrclip   = 2;
+
+       /*
+        * These are all implicitly set
+        * fcw->synd_post = 0;
+        * fcw->dec_convllr = 0;
+        * fcw->hcout_convllr = 0;
+        * fcw->hcout_size1 = 0;
+        * fcw->hcout_offset = 0;
+        * fcw->negstop_th = 0;
+        * fcw->negstop_it = 0;
+        * fcw->negstop_en = 0;
+        * fcw->gain_i = 1;
+        * fcw->gain_h = 1;
+        */
+       if (fcw->hcout_en > 0) {
+               parity_offset = (op->ldpc_dec.basegraph == 1 ? 20 : 8)
+                       * op->ldpc_dec.z_c - op->ldpc_dec.n_filler;
+               k0_p = (fcw->k0 > parity_offset) ?
+                               fcw->k0 - op->ldpc_dec.n_filler : fcw->k0;
+               ncb_p = fcw->ncb - op->ldpc_dec.n_filler;
+               l = k0_p + fcw->rm_e;
+               harq_out_length = (uint16_t) fcw->hcin_size0;
+               harq_out_length = RTE_MIN(RTE_MAX(harq_out_length, l), ncb_p);
+               harq_out_length = RTE_ALIGN_CEIL(harq_out_length, 64);
+               fcw->hcout_size0 = harq_out_length;
+               fcw->hcout_size1 = 0;
+               fcw->hcout_offset = 0;
+               harq_layout[harq_index].offset = fcw->hcout_offset;
+               harq_layout[harq_index].size0 = fcw->hcout_size0;
+       } else {
+               fcw->hcout_size0 = 0;
+               fcw->hcout_size1 = 0;
+               fcw->hcout_offset = 0;
+       }
+
+       fcw->tb_crc_select = 0;
+       if (check_bit(op->ldpc_dec.op_flags, RTE_BBDEV_LDPC_CRC_TYPE_24A_CHECK))
+               fcw->tb_crc_select = 2;
+       if (check_bit(op->ldpc_dec.op_flags, RTE_BBDEV_LDPC_CRC_TYPE_16_CHECK))
+               fcw->tb_crc_select = 1;
+}
+
 static inline void
 vrb_dma_desc_ld_update(struct rte_bbdev_dec_op *op,
                struct acc_dma_req_desc *desc,
@@ -1817,6 +2040,139 @@ vrb_dma_desc_ld_update(struct rte_bbdev_dec_op *op,
        desc->op_addr = op;
 }
 
+static inline int
+vrb2_dma_desc_ld_fill(struct rte_bbdev_dec_op *op,
+               struct acc_dma_req_desc *desc,
+               struct rte_mbuf **input, struct rte_mbuf *h_output,
+               uint32_t *in_offset, uint32_t *h_out_offset,
+               uint32_t *h_out_length, uint32_t *mbuf_total_left,
+               uint32_t *seg_total_left, struct acc_fcw_ld *fcw)
+{
+       struct rte_bbdev_op_ldpc_dec *dec = &op->ldpc_dec;
+       int next_triplet = 1; /* FCW already done. */
+       uint32_t input_length;
+       uint16_t output_length, crc24_overlap = 0;
+       uint16_t sys_cols, K, h_p_size, h_np_size;
+
+       acc_header_init(desc);
+
+       if (check_bit(op->ldpc_dec.op_flags, RTE_BBDEV_LDPC_CRC_TYPE_24B_DROP))
+               crc24_overlap = 24;
+
+       /* Compute some LDPC BG lengths. */
+       input_length = fcw->rm_e;
+       if (check_bit(op->ldpc_dec.op_flags, RTE_BBDEV_LDPC_LLR_COMPRESSION))
+               input_length = (input_length * 3 + 3) / 4;
+       sys_cols = (dec->basegraph == 1) ? 22 : 10;
+       K = sys_cols * dec->z_c;
+       output_length = K - dec->n_filler - crc24_overlap;
+
+       if (unlikely((*mbuf_total_left == 0) || (*mbuf_total_left < 
input_length))) {
+               rte_bbdev_log(ERR,
+                               "Mismatch between mbuf length and included CB 
sizes: mbuf len %u, cb len %u",
+                               *mbuf_total_left, input_length);
+               return -1;
+       }
+
+       next_triplet = acc_dma_fill_blk_type_in(desc, input,
+                       in_offset, input_length,
+                       seg_total_left, next_triplet,
+                       check_bit(op->ldpc_dec.op_flags,
+                       RTE_BBDEV_LDPC_DEC_SCATTER_GATHER));
+
+       if (unlikely(next_triplet < 0)) {
+               rte_bbdev_log(ERR,
+                               "Mismatch between data to process and mbuf data 
length in bbdev_op: %p",
+                               op);
+               return -1;
+       }
+
+       if (check_bit(op->ldpc_dec.op_flags, 
RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE)) {
+               if (op->ldpc_dec.harq_combined_input.data == 0) {
+                       rte_bbdev_log(ERR, "HARQ input is not defined");
+                       return -1;
+               }
+               h_p_size = fcw->hcin_size0 + fcw->hcin_size1;
+               if (fcw->hcin_decomp_mode == 1)
+                       h_p_size = (h_p_size * 3 + 3) / 4;
+               else if (fcw->hcin_decomp_mode == 4)
+                       h_p_size = h_p_size / 2;
+               if (op->ldpc_dec.harq_combined_input.data == 0) {
+                       rte_bbdev_log(ERR, "HARQ input is not defined");
+                       return -1;
+               }
+               acc_dma_fill_blk_type(
+                               desc,
+                               op->ldpc_dec.harq_combined_input.data,
+                               op->ldpc_dec.harq_combined_input.offset,
+                               h_p_size,
+                               next_triplet,
+                               ACC_DMA_BLKID_IN_HARQ);
+               next_triplet++;
+       }
+
+       desc->data_ptrs[next_triplet - 1].last = 1;
+       desc->m2dlen = next_triplet;
+       *mbuf_total_left -= input_length;
+
+       next_triplet = acc_dma_fill_blk_type(desc, h_output,
+                       *h_out_offset, output_length >> 3, next_triplet,
+                       ACC_DMA_BLKID_OUT_HARD);
+
+       if (check_bit(op->ldpc_dec.op_flags, RTE_BBDEV_LDPC_SOFT_OUT_ENABLE)) {
+               if (op->ldpc_dec.soft_output.data == 0) {
+                       rte_bbdev_log(ERR, "Soft output is not defined");
+                       return -1;
+               }
+               dec->soft_output.length = fcw->rm_e;
+               acc_dma_fill_blk_type(desc, dec->soft_output.data, 
dec->soft_output.offset,
+                               fcw->rm_e, next_triplet, 
ACC_DMA_BLKID_OUT_SOFT);
+               next_triplet++;
+       }
+
+       if (check_bit(op->ldpc_dec.op_flags,
+                               RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE)) {
+               if (op->ldpc_dec.harq_combined_output.data == 0) {
+                       rte_bbdev_log(ERR, "HARQ output is not defined");
+                       return -1;
+               }
+
+               /* Pruned size of the HARQ */
+               h_p_size = fcw->hcout_size0 + fcw->hcout_size1;
+               /* Non-Pruned size of the HARQ */
+               h_np_size = fcw->hcout_offset > 0 ?
+                               fcw->hcout_offset + fcw->hcout_size1 :
+                               h_p_size;
+               if (fcw->hcin_decomp_mode == 1) {
+                       h_np_size = (h_np_size * 3 + 3) / 4;
+                       h_p_size = (h_p_size * 3 + 3) / 4;
+               } else if (fcw->hcin_decomp_mode == 4) {
+                       h_np_size = h_np_size / 2;
+                       h_p_size = h_p_size / 2;
+               }
+               dec->harq_combined_output.length = h_np_size;
+               acc_dma_fill_blk_type(
+                               desc,
+                               dec->harq_combined_output.data,
+                               dec->harq_combined_output.offset,
+                               h_p_size,
+                               next_triplet,
+                               ACC_DMA_BLKID_OUT_HARQ);
+
+               next_triplet++;
+       }
+
+       *h_out_length = output_length >> 3;
+       dec->hard_output.length += *h_out_length;
+       *h_out_offset += *h_out_length;
+       desc->data_ptrs[next_triplet - 1].last = 1;
+       desc->d2mlen = next_triplet - desc->m2dlen;
+
+       desc->op_addr = op;
+
+       return 0;
+}
+
 /* Enqueue one encode operations for device in CB mode. */
 static inline int
 enqueue_enc_one_op_cb(struct acc_queue *q, struct rte_bbdev_enc_op *op,
@@ -1877,6 +2233,7 @@ enqueue_ldpc_enc_n_op_cb(struct acc_queue *q, struct 
rte_bbdev_enc_op **ops,
        /** This could be done at polling. */
        acc_header_init(&desc->req);
        desc->req.numCBs = num;
+       desc->req.dltb = 0;
 
        in_length_in_bytes = ops[0]->ldpc_enc.input.data->data_len;
        out_length = (enc->cb_params.e + 7) >> 3;
@@ -2102,6 +2459,105 @@ vrb1_enqueue_ldpc_enc_one_op_tb(struct acc_queue *q, 
struct rte_bbdev_enc_op *op
        return return_descs;
 }
 
+/* Fill in a frame control word for LDPC encoding. */
+static inline void
+vrb2_fcw_letb_fill(const struct rte_bbdev_enc_op *op, struct acc_fcw_le *fcw)
+{
+       fcw->qm = op->ldpc_enc.q_m;
+       fcw->nfiller = op->ldpc_enc.n_filler;
+       fcw->BG = (op->ldpc_enc.basegraph - 1);
+       fcw->Zc = op->ldpc_enc.z_c;
+       fcw->ncb = op->ldpc_enc.n_cb;
+       fcw->k0 = get_k0(fcw->ncb, fcw->Zc, op->ldpc_enc.basegraph,
+                       op->ldpc_enc.rv_index);
+       fcw->rm_e = op->ldpc_enc.tb_params.ea;
+       fcw->rm_e_b = op->ldpc_enc.tb_params.eb;
+       fcw->crc_select = check_bit(op->ldpc_enc.op_flags,
+                       RTE_BBDEV_LDPC_CRC_24B_ATTACH);
+       fcw->bypass_intlv = 0;
+       if (op->ldpc_enc.tb_params.c > 1) {
+               fcw->mcb_count = 0;
+               fcw->C = op->ldpc_enc.tb_params.c;
+               fcw->Cab = op->ldpc_enc.tb_params.cab;
+       } else {
+               fcw->mcb_count = 1;
+               fcw->C = 0;
+       }
+}
+
+/* Enqueue one encode operations for device in TB mode.
+ * returns the number of descs used.
+ */
+static inline int
+vrb2_enqueue_ldpc_enc_one_op_tb(struct acc_queue *q, struct rte_bbdev_enc_op 
*op,
+               uint16_t enq_descs)
+{
+       union acc_dma_desc *desc = NULL;
+       uint32_t in_offset, out_offset, out_length, seg_total_left;
+       struct rte_mbuf *input, *output_head, *output;
+
+       uint16_t desc_idx = ((q->sw_ring_head + enq_descs) & 
q->sw_ring_wrap_mask);
+       desc = q->ring_addr + desc_idx;
+       vrb2_fcw_letb_fill(op, &desc->req.fcw_le);
+       struct rte_bbdev_op_ldpc_enc *enc = &op->ldpc_enc;
+       int next_triplet = 1; /* FCW already done */
+       uint32_t in_length_in_bytes;
+       uint16_t K, in_length_in_bits;
+
+       input = enc->input.data;
+       output_head = output = enc->output.data;
+       in_offset = enc->input.offset;
+       out_offset = enc->output.offset;
+       seg_total_left = rte_pktmbuf_data_len(enc->input.data) - in_offset;
+
+       acc_header_init(&desc->req);
+       K = (enc->basegraph == 1 ? 22 : 10) * enc->z_c;
+       in_length_in_bits = K - enc->n_filler;
+       if ((enc->op_flags & RTE_BBDEV_LDPC_CRC_24A_ATTACH) ||
+                       (enc->op_flags & RTE_BBDEV_LDPC_CRC_24B_ATTACH))
+               in_length_in_bits -= 24;
+       in_length_in_bytes = (in_length_in_bits >> 3) * enc->tb_params.c;
+
+       next_triplet = acc_dma_fill_blk_type_in(&desc->req, &input, &in_offset,
+                       in_length_in_bytes, &seg_total_left, next_triplet,
+                       check_bit(enc->op_flags, 
RTE_BBDEV_LDPC_ENC_SCATTER_GATHER));
+       if (unlikely(next_triplet < 0)) {
+               rte_bbdev_log(ERR,
+                               "Mismatch between data to process and mbuf data 
length in bbdev_op: %p",
+                               op);
+               return -1;
+       }
+       desc->req.data_ptrs[next_triplet - 1].last = 1;
+       desc->req.m2dlen = next_triplet;
+
+       /* Set output length */
+       /* Integer round up division by 8 */
+       out_length = (enc->tb_params.ea * enc->tb_params.cab +
+                       enc->tb_params.eb * (enc->tb_params.c - 
enc->tb_params.cab)  + 7) >> 3;
+
+       next_triplet = acc_dma_fill_blk_type(&desc->req, output, out_offset,
+                       out_length, next_triplet, ACC_DMA_BLKID_OUT_ENC);
+       enc->output.length = out_length;
+       out_offset += out_length;
+       desc->req.data_ptrs[next_triplet - 1].last = 1;
+       desc->req.data_ptrs[next_triplet - 1].dma_ext = 0;
+       desc->req.d2mlen = next_triplet - desc->req.m2dlen;
+       desc->req.numCBs = enc->tb_params.c;
+       if (desc->req.numCBs > 1)
+               desc->req.dltb = 1;
+       desc->req.op_addr = op;
+
+       if (out_length < ACC_MAX_E_MBUF)
+               mbuf_append(output_head, output, out_length);
+
+#ifdef RTE_LIBRTE_BBDEV_DEBUG
+       rte_memdump(stderr, "FCW", &desc->req.fcw_le, sizeof(desc->req.fcw_le));
+       rte_memdump(stderr, "Req Desc.", desc, sizeof(*desc));
+#endif
+       /* One CB (one op) was successfully prepared to enqueue */
+       return 1;
+}
+
 /** Enqueue one decode operations for device in CB mode. */
 static inline int
 enqueue_dec_one_op_cb(struct acc_queue *q, struct rte_bbdev_dec_op *op,
@@ -2215,10 +2671,16 @@ vrb_enqueue_ldpc_dec_one_op_cb(struct acc_queue *q, 
struct rte_bbdev_dec_op *op,
                else
                        seg_total_left = fcw->rm_e;
 
-               ret = vrb1_dma_desc_ld_fill(op, &desc->req, &input, h_output,
-                               &in_offset, &h_out_offset,
-                               &h_out_length, &mbuf_total_left,
-                               &seg_total_left, fcw);
+               if (q->d->device_variant == VRB1_VARIANT)
+                       ret = vrb1_dma_desc_ld_fill(op, &desc->req, &input, 
h_output,
+                                       &in_offset, &h_out_offset,
+                                       &h_out_length, &mbuf_total_left,
+                                       &seg_total_left, fcw);
+               else
+                       ret = vrb2_dma_desc_ld_fill(op, &desc->req, &input, 
h_output,
+                                       &in_offset, &h_out_offset,
+                                       &h_out_length, &mbuf_total_left,
+                                       &seg_total_left, fcw);
                if (unlikely(ret < 0))
                        return ret;
        }
@@ -2308,11 +2770,18 @@ vrb_enqueue_ldpc_dec_one_op_tb(struct acc_queue *q, 
struct rte_bbdev_dec_op *op,
                rte_memcpy(&desc->req.fcw_ld, &desc_first->req.fcw_ld, 
ACC_FCW_LD_BLEN);
                desc->req.fcw_ld.tb_trailer_size = (c - r - 1) * trail_len;
 
-               ret = vrb1_dma_desc_ld_fill(op, &desc->req, &input,
-                               h_output, &in_offset, &h_out_offset,
-                               &h_out_length,
-                               &mbuf_total_left, &seg_total_left,
-                               &desc->req.fcw_ld);
+               if (q->d->device_variant == VRB1_VARIANT)
+                       ret = vrb1_dma_desc_ld_fill(op, &desc->req, &input,
+                                       h_output, &in_offset, &h_out_offset,
+                                       &h_out_length,
+                                       &mbuf_total_left, &seg_total_left,
+                                       &desc->req.fcw_ld);
+               else
+                       ret = vrb2_dma_desc_ld_fill(op, &desc->req, &input,
+                                       h_output, &in_offset, &h_out_offset,
+                                       &h_out_length,
+                                       &mbuf_total_left, &seg_total_left,
+                                       &desc->req.fcw_ld);
 
                if (unlikely(ret < 0))
                        return ret;
@@ -2576,14 +3045,22 @@ vrb_enqueue_ldpc_enc_tb(struct rte_bbdev_queue_data 
*q_data,
        int descs_used;
 
        for (i = 0; i < num; ++i) {
-               cbs_in_tb = get_num_cbs_in_tb_ldpc_enc(&ops[i]->ldpc_enc);
-               /* Check if there are available space for further processing. */
-               if (unlikely((avail - cbs_in_tb < 0) || (cbs_in_tb == 0))) {
-                       acc_enqueue_ring_full(q_data);
-                       break;
+               if (q->d->device_variant == VRB1_VARIANT) {
+                       cbs_in_tb = 
get_num_cbs_in_tb_ldpc_enc(&ops[i]->ldpc_enc);
+                       /* Check if there are available space for further 
processing. */
+                       if (unlikely((avail - cbs_in_tb < 0) || (cbs_in_tb == 
0))) {
+                               acc_enqueue_ring_full(q_data);
+                               break;
+                       }
+                       descs_used = vrb1_enqueue_ldpc_enc_one_op_tb(q, ops[i],
+                                       enqueued_descs, cbs_in_tb);
+               } else {
+                       if (unlikely(avail < 1)) {
+                               acc_enqueue_ring_full(q_data);
+                               break;
+                       }
+                       descs_used = vrb2_enqueue_ldpc_enc_one_op_tb(q, ops[i], 
enqueued_descs);
                }
-
-               descs_used = vrb1_enqueue_ldpc_enc_one_op_tb(q, ops[i], 
enqueued_descs, cbs_in_tb);
                if (descs_used < 0) {
                        acc_enqueue_invalid(q_data);
                        break;
@@ -2865,6 +3342,52 @@ vrb_dequeue_enc_one_op_cb(struct acc_queue *q, struct 
rte_bbdev_enc_op **ref_op,
        return desc->req.numCBs;
 }
 
+/* Dequeue one LDPC encode operations from VRB2 device in TB mode. */
+static inline int
+vrb2_dequeue_ldpc_enc_one_op_tb(struct acc_queue *q, struct rte_bbdev_enc_op 
**ref_op,
+               uint16_t *dequeued_ops, uint32_t *aq_dequeued,
+               uint16_t *dequeued_descs)
+{
+       union acc_dma_desc *desc, atom_desc;
+       union acc_dma_rsp_desc rsp;
+       struct rte_bbdev_enc_op *op;
+       int desc_idx = ((q->sw_ring_tail + *dequeued_descs) & 
q->sw_ring_wrap_mask);
+
+       desc = q->ring_addr + desc_idx;
+       atom_desc.atom_hdr = __atomic_load_n((uint64_t *)desc, 
__ATOMIC_RELAXED);
+
+       /* Check fdone bit. */
+       if (!(atom_desc.rsp.val & ACC_FDONE))
+               return -1;
+
+       rsp.val = atom_desc.rsp.val;
+       rte_bbdev_log_debug("Resp. desc %p: %x", desc, rsp.val);
+
+       /* Dequeue. */
+       op = desc->req.op_addr;
+
+       /* Clearing status, it will be set based on response. */
+       op->status = 0;
+       op->status |= rsp.input_err << RTE_BBDEV_DATA_ERROR;
+       op->status |= rsp.dma_err << RTE_BBDEV_DRV_ERROR;
+       op->status |= rsp.fcw_err << RTE_BBDEV_DRV_ERROR;
+       op->status |= rsp.engine_hung << RTE_BBDEV_ENGINE_ERROR;
+
+       if (desc->req.last_desc_in_batch) {
+               (*aq_dequeued)++;
+               desc->req.last_desc_in_batch = 0;
+       }
+       desc->rsp.val = ACC_DMA_DESC_TYPE;
+       desc->rsp.add_info_0 = 0; /* Reserved bits. */
+       desc->rsp.add_info_1 = 0; /* Reserved bits. */
+
+       /* One op was successfully dequeued */
+       ref_op[0] = op;
+       (*dequeued_descs)++;
+       (*dequeued_ops)++;
+       return 1;
+}
+
 /* Dequeue one LDPC encode operations from device in TB mode.
  * That operation may cover multiple descriptors.
  */
@@ -3189,9 +3712,14 @@ vrb_dequeue_ldpc_enc(struct rte_bbdev_queue_data *q_data,
 
        for (i = 0; i < avail; i++) {
                if (cbm == RTE_BBDEV_TRANSPORT_BLOCK)
-                       ret = vrb_dequeue_enc_one_op_tb(q, &ops[dequeued_ops],
-                                       &dequeued_ops, &aq_dequeued,
-                                       &dequeued_descs, num);
+                       if (q->d->device_variant == VRB1_VARIANT)
+                               ret = vrb_dequeue_enc_one_op_tb(q, 
&ops[dequeued_ops],
+                                               &dequeued_ops, &aq_dequeued,
+                                               &dequeued_descs, num);
+                       else
+                               ret = vrb2_dequeue_ldpc_enc_one_op_tb(q, 
&ops[dequeued_ops],
+                                               &dequeued_ops, &aq_dequeued,
+                                               &dequeued_descs);
                else
                        ret = vrb_dequeue_enc_one_op_cb(q, &ops[dequeued_ops],
                                        &dequeued_ops, &aq_dequeued,
@@ -3536,6 +4064,7 @@ vrb_bbdev_init(struct rte_bbdev *dev, struct 
rte_pci_driver *drv)
        } else {
                d->device_variant = VRB2_VARIANT;
                d->queue_offset = vrb2_queue_offset;
+               d->fcw_ld_fill = vrb2_fcw_ld_fill;
                d->num_qgroups = VRB2_NUM_QGRPS;
                d->num_aqs = VRB2_NUM_AQS;
                if (d->pf_device)
-- 
2.34.1

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