On 9/28/20 5:29 PM, Nicolas Chautru wrote:
> Additional support for HARQ memory loopback
>
> Signed-off-by: Nicolas Chautru <nicolas.chau...@intel.com>
> Acked-by: Liu Tianjiao <tianjiao....@intel.com>
> ---
> drivers/baseband/acc100/rte_acc100_pmd.c | 158
> +++++++++++++++++++++++++++++++
> 1 file changed, 158 insertions(+)
>
> diff --git a/drivers/baseband/acc100/rte_acc100_pmd.c
> b/drivers/baseband/acc100/rte_acc100_pmd.c
> index b223547..e484c0a 100644
> --- a/drivers/baseband/acc100/rte_acc100_pmd.c
> +++ b/drivers/baseband/acc100/rte_acc100_pmd.c
> @@ -658,6 +658,7 @@
> RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE |
> RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE |
> #ifdef ACC100_EXT_MEM
> + RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_LOOPBACK |
> RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_IN_ENABLE |
> RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_OUT_ENABLE |
> #endif
> @@ -1480,12 +1481,169 @@
> return 1;
> }
>
> +static inline int
> +harq_loopback(struct acc100_queue *q, struct rte_bbdev_dec_op *op,
> + uint16_t total_enqueued_cbs) {
> + struct acc100_fcw_ld *fcw;
> + union acc100_dma_desc *desc;
> + int next_triplet = 1;
> + struct rte_mbuf *hq_output_head, *hq_output;
> + uint16_t harq_in_length = op->ldpc_dec.harq_combined_input.length;
> + if (harq_in_length == 0) {
> + rte_bbdev_log(ERR, "Loopback of invalid null size\n");
> + return -EINVAL;
> + }
> +
> + int h_comp = check_bit(op->ldpc_dec.op_flags,
> + RTE_BBDEV_LDPC_HARQ_6BIT_COMPRESSION
> + ) ? 1 : 0;
bool
Tom
> + if (h_comp == 1)
> + harq_in_length = harq_in_length * 8 / 6;
> + harq_in_length = RTE_ALIGN(harq_in_length, 64);
> + uint16_t harq_dma_length_in = (h_comp == 0) ?
> + harq_in_length :
> + harq_in_length * 6 / 8;
> + uint16_t harq_dma_length_out = harq_dma_length_in;
> + bool ddr_mem_in = check_bit(op->ldpc_dec.op_flags,
> + RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_IN_ENABLE);
> + union acc100_harq_layout_data *harq_layout = q->d->harq_layout;
> + uint16_t harq_index = (ddr_mem_in ?
> + op->ldpc_dec.harq_combined_input.offset :
> + op->ldpc_dec.harq_combined_output.offset)
> + / ACC100_HARQ_OFFSET;
> +
> + uint16_t desc_idx = ((q->sw_ring_head + total_enqueued_cbs)
> + & q->sw_ring_wrap_mask);
> + desc = q->ring_addr + desc_idx;
> + fcw = &desc->req.fcw_ld;
> + /* Set the FCW from loopback into DDR */
> + memset(fcw, 0, sizeof(struct acc100_fcw_ld));
> + fcw->FCWversion = ACC100_FCW_VER;
> + fcw->qm = 2;
> + fcw->Zc = 384;
> + if (harq_in_length < 16 * N_ZC_1)
> + fcw->Zc = 16;
> + fcw->ncb = fcw->Zc * N_ZC_1;
> + fcw->rm_e = 2;
> + fcw->hcin_en = 1;
> + fcw->hcout_en = 1;
> +
> + rte_bbdev_log(DEBUG, "Loopback IN %d Index %d offset %d length %d %d\n",
> + ddr_mem_in, harq_index,
> + harq_layout[harq_index].offset, harq_in_length,
> + harq_dma_length_in);
> +
> + if (ddr_mem_in && (harq_layout[harq_index].offset > 0)) {
> + fcw->hcin_size0 = harq_layout[harq_index].size0;
> + fcw->hcin_offset = harq_layout[harq_index].offset;
> + fcw->hcin_size1 = harq_in_length - fcw->hcin_offset;
> + harq_dma_length_in = (fcw->hcin_size0 + fcw->hcin_size1);
> + if (h_comp == 1)
> + harq_dma_length_in = harq_dma_length_in * 6 / 8;
> + } else {
> + fcw->hcin_size0 = harq_in_length;
> + }
> + harq_layout[harq_index].val = 0;
> + rte_bbdev_log(DEBUG, "Loopback FCW Config %d %d %d\n",
> + fcw->hcin_size0, fcw->hcin_offset, fcw->hcin_size1);
> + fcw->hcout_size0 = harq_in_length;
> + fcw->hcin_decomp_mode = h_comp;
> + fcw->hcout_comp_mode = h_comp;
> + fcw->gain_i = 1;
> + fcw->gain_h = 1;
> +
> + /* Set the prefix of descriptor. This could be done at polling */
> + desc->req.word0 = ACC100_DMA_DESC_TYPE;
> + desc->req.word1 = 0; /**< Timestamp could be disabled */
> + desc->req.word2 = 0;
> + desc->req.word3 = 0;
> + desc->req.numCBs = 1;
> +
> + /* Null LLR input for Decoder */
> + desc->req.data_ptrs[next_triplet].address =
> + q->lb_in_addr_phys;
> + desc->req.data_ptrs[next_triplet].blen = 2;
> + desc->req.data_ptrs[next_triplet].blkid = ACC100_DMA_BLKID_IN;
> + desc->req.data_ptrs[next_triplet].last = 0;
> + desc->req.data_ptrs[next_triplet].dma_ext = 0;
> + next_triplet++;
> +
> + /* HARQ Combine input from either Memory interface */
> + if (!ddr_mem_in) {
> + next_triplet = acc100_dma_fill_blk_type_out(&desc->req,
> + op->ldpc_dec.harq_combined_input.data,
> + op->ldpc_dec.harq_combined_input.offset,
> + harq_dma_length_in,
> + next_triplet,
> + ACC100_DMA_BLKID_IN_HARQ);
> + } else {
> + desc->req.data_ptrs[next_triplet].address =
> + op->ldpc_dec.harq_combined_input.offset;
> + desc->req.data_ptrs[next_triplet].blen =
> + harq_dma_length_in;
> + desc->req.data_ptrs[next_triplet].blkid =
> + ACC100_DMA_BLKID_IN_HARQ;
> + desc->req.data_ptrs[next_triplet].dma_ext = 1;
> + next_triplet++;
> + }
> + desc->req.data_ptrs[next_triplet - 1].last = 1;
> + desc->req.m2dlen = next_triplet;
> +
> + /* Dropped decoder hard output */
> + desc->req.data_ptrs[next_triplet].address =
> + q->lb_out_addr_phys;
> + desc->req.data_ptrs[next_triplet].blen = BYTES_IN_WORD;
> + desc->req.data_ptrs[next_triplet].blkid = ACC100_DMA_BLKID_OUT_HARD;
> + desc->req.data_ptrs[next_triplet].last = 0;
> + desc->req.data_ptrs[next_triplet].dma_ext = 0;
> + next_triplet++;
> +
> + /* HARQ Combine output to either Memory interface */
> + if (check_bit(op->ldpc_dec.op_flags,
> + RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_OUT_ENABLE
> + )) {
> + desc->req.data_ptrs[next_triplet].address =
> + op->ldpc_dec.harq_combined_output.offset;
> + desc->req.data_ptrs[next_triplet].blen =
> + harq_dma_length_out;
> + desc->req.data_ptrs[next_triplet].blkid =
> + ACC100_DMA_BLKID_OUT_HARQ;
> + desc->req.data_ptrs[next_triplet].dma_ext = 1;
> + next_triplet++;
> + } else {
> + hq_output_head = op->ldpc_dec.harq_combined_output.data;
> + hq_output = op->ldpc_dec.harq_combined_output.data;
> + next_triplet = acc100_dma_fill_blk_type_out(
> + &desc->req,
> + op->ldpc_dec.harq_combined_output.data,
> + op->ldpc_dec.harq_combined_output.offset,
> + harq_dma_length_out,
> + next_triplet,
> + ACC100_DMA_BLKID_OUT_HARQ);
> + /* HARQ output */
> + mbuf_append(hq_output_head, hq_output, harq_dma_length_out);
> + op->ldpc_dec.harq_combined_output.length =
> + harq_dma_length_out;
> + }
> + desc->req.data_ptrs[next_triplet - 1].last = 1;
> + desc->req.d2mlen = next_triplet - desc->req.m2dlen;
> + desc->req.op_addr = op;
> +
> + /* One CB (one op) was successfully prepared to enqueue */
> + return 1;
> +}
> +
> /** Enqueue one decode operations for ACC100 device in CB mode */
> static inline int
> enqueue_ldpc_dec_one_op_cb(struct acc100_queue *q, struct rte_bbdev_dec_op
> *op,
> uint16_t total_enqueued_cbs, bool same_op)
> {
> int ret;
> + if (unlikely(check_bit(op->ldpc_dec.op_flags,
> + RTE_BBDEV_LDPC_INTERNAL_HARQ_MEMORY_LOOPBACK))) {
> + ret = harq_loopback(q, op, total_enqueued_cbs);
> + return ret;
> + }
>
> union acc100_dma_desc *desc;
> uint16_t desc_idx = ((q->sw_ring_head + total_enqueued_cbs)
