snipped
> +uint16_t
> +ice_recv_pkts(void *rx_queue,
> + struct rte_mbuf **rx_pkts,
> + uint16_t nb_pkts)
> +{
> + struct ice_rx_queue *rxq = rx_queue;
> + volatile union ice_rx_desc *rx_ring = rxq->rx_ring;
> + volatile union ice_rx_desc *rxdp;
> + union ice_rx_desc rxd;
> + struct ice_rx_entry *sw_ring = rxq->sw_ring;
> + struct ice_rx_entry *rxe;
> + struct rte_mbuf *nmb; /* new allocated mbuf */
> + struct rte_mbuf *rxm; /* pointer to store old mbuf in SW ring */
> + uint16_t rx_id = rxq->rx_tail;
> + uint16_t nb_rx = 0;
> + uint16_t nb_hold = 0;
> + uint16_t rx_packet_len;
> + uint32_t rx_status;
> + uint64_t qword1;
> + uint64_t dma_addr;
> + uint64_t pkt_flags = 0;
> + uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;
> + struct rte_eth_dev *dev;
> +
> + while (nb_rx < nb_pkts) {
> + rxdp = &rx_ring[rx_id];
> + qword1 = rte_le_to_cpu_64(rxdp-
> >wb.qword1.status_error_len);
> + rx_status = (qword1 & ICE_RXD_QW1_STATUS_M) >>
> + ICE_RXD_QW1_STATUS_S;
> +
> + /* Check the DD bit first */
> + if (!(rx_status & (1 << ICE_RX_DESC_STATUS_DD_S)))
> + break;
> +
> + /* allocate mbuf */
> + nmb = rte_mbuf_raw_alloc(rxq->mp);
> + if (unlikely(!nmb)) {
> + dev = ICE_VSI_TO_ETH_DEV(rxq->vsi);
> + dev->data->rx_mbuf_alloc_failed++;
> + break;
> + }
Should we check if the received packet length is greater than mbug pkt_len then
we need bulk alloc with n_segs?
> + rxd = *rxdp; /* copy descriptor in ring to temp variable*/
> +
> + nb_hold++;
> + rxe = &sw_ring[rx_id]; /* get corresponding mbuf in SW ring */
> + rx_id++;
> + if (unlikely(rx_id == rxq->nb_rx_desc))
> + rx_id = 0;
> + rxm = rxe->mbuf;
> + rxe->mbuf = nmb;
> + dma_addr =
> + rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));
> +
> + /**
> + * fill the read format of descriptor with physic address in
> + * new allocated mbuf: nmb
> + */
> + rxdp->read.hdr_addr = 0;
> + rxdp->read.pkt_addr = dma_addr;
> +
> + /* calculate rx_packet_len of the received pkt */
> + rx_packet_len = ((qword1 & ICE_RXD_QW1_LEN_PBUF_M) >>
> + ICE_RXD_QW1_LEN_PBUF_S) - rxq->crc_len;
> +
> + /* fill old mbuf with received descriptor: rxd */
> + rxm->data_off = RTE_PKTMBUF_HEADROOM;
> + rte_prefetch0(RTE_PTR_ADD(rxm->buf_addr,
> RTE_PKTMBUF_HEADROOM));
> + rxm->nb_segs = 1;
Same comment for above for multi segment alloc for larger packets or smaller
pkt_len in mempool?
Snipped
