Within the scalar packets, add a shortcut path for packets that don't use TSO and have only a single data descriptor.
Signed-off-by: Bruce Richardson <[email protected]> --- drivers/net/intel/common/tx_scalar_fns.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/net/intel/common/tx_scalar_fns.h b/drivers/net/intel/common/tx_scalar_fns.h index 27791cf138..55502b46ed 100644 --- a/drivers/net/intel/common/tx_scalar_fns.h +++ b/drivers/net/intel/common/tx_scalar_fns.h @@ -304,6 +304,28 @@ ci_xmit_pkts(struct ci_tx_queue *txq, ci_txd_enable_checksum(ol_flags, &td_cmd, &td_offset, tx_offload); + /* special case for single descriptor packet, without TSO offload */ + if (nb_used == 1 && (ol_flags & (RTE_MBUF_F_TX_TCP_SEG | RTE_MBUF_F_TX_UDP_SEG)) == 0) { + txd = &ci_tx_ring[tx_id]; + tx_id = txe->next_id; + + if (txe->mbuf) + rte_pktmbuf_free_seg(txe->mbuf); + *txe = (struct ci_tx_entry){ .mbuf = tx_pkt, .last_id = tx_last, .next_id = tx_id }; + + /* Setup TX Descriptor */ + td_cmd |= CI_TX_DESC_CMD_EOP; + const uint64_t cmd_type_offset_bsz = CI_TX_DESC_DTYPE_DATA | + ((uint64_t)td_cmd << CI_TXD_QW1_CMD_S) | + ((uint64_t)td_offset << CI_TXD_QW1_OFFSET_S) | + ((uint64_t)tx_pkt->data_len << CI_TXD_QW1_TX_BUF_SZ_S) | + ((uint64_t)td_tag << CI_TXD_QW1_L2TAG1_S); + write_txd(txd, rte_mbuf_data_iova(tx_pkt), cmd_type_offset_bsz); + + txe = &sw_ring[tx_id]; + goto end_pkt; + } + if (nb_ctx) { /* Setup TX context descriptor if required */ uint64_t *ctx_txd = RTE_CAST_PTR(uint64_t *, &ci_tx_ring[tx_id]); @@ -395,6 +417,7 @@ ci_xmit_pkts(struct ci_tx_queue *txq, txe = txn; m_seg = m_seg->next; } while (m_seg); +end_pkt: txq->nb_tx_used = (uint16_t)(txq->nb_tx_used + nb_used); txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_used); -- 2.51.0
