Function ionic_rx_fill_one

dpdk/drivers/net/ionic/ionic_rxtx_simple.c:314–350

* Fills one descriptor with mbufs. Does not advance the head index. */

 * Fills one descriptor with mbufs. Does not advance the head index.
 */
static __rte_always_inline int
ionic_rx_fill_one(struct ionic_rx_qcq *rxq)
{
	struct ionic_queue *q = &rxq->qcq.q;
	struct rte_mbuf *rxm;
	struct ionic_rxq_desc *desc, *desc_base = q->base;
	rte_iova_t data_iova;
	void **info;
	int ret;

	info = &q->info[q->head_idx];
	desc = &desc_base[q->head_idx];

	/* mbuf is unused */
	if (info[0])
		return 0;

	if (rxq->mb_idx == 0) {
		ret = rte_mempool_get_bulk(rxq->mb_pool,
					(void **)rxq->mbs,
					IONIC_MBUF_BULK_ALLOC);
		if (ret) {
			assert(0);
			return -ENOMEM;
		}

		rxq->mb_idx = IONIC_MBUF_BULK_ALLOC;
	}

	rxm = rxq->mbs[--rxq->mb_idx];
	info[0] = rxm;

	data_iova = rte_mbuf_data_iova_default(rxm);
	desc->addr = rte_cpu_to_le_64(data_iova);

	return 0;
}

/*
 * Walk the CQ to find completed receive descriptors.