Function ngbe_set_tx_function

dpdk/drivers/net/ngbe/ngbe_rxtx.c:1855–1876

Takes an ethdev and a queue and sets up the tx function to be used based on * the queue parameters. Used in tx_queue_setup by primary process and then * in dev_init by secondary process when attaching to an existing ethdev. */

 * in dev_init by secondary process when attaching to an existing ethdev.
 */
void
ngbe_set_tx_function(struct rte_eth_dev *dev, struct ngbe_tx_queue *txq)
{
	/* Use a simple Tx queue (no offloads, no multi segs) if possible */
	if (txq->offloads == 0 &&
			txq->tx_free_thresh >= RTE_PMD_NGBE_TX_MAX_BURST) {
		PMD_INIT_LOG(DEBUG, "Using simple tx code path");
		dev->tx_pkt_burst = ngbe_xmit_pkts_simple;
		dev->tx_pkt_prepare = NULL;
	} else {
		PMD_INIT_LOG(DEBUG, "Using full-featured tx code path");
		PMD_INIT_LOG(DEBUG,
				" - offloads = 0x%" PRIx64,
				txq->offloads);
		PMD_INIT_LOG(DEBUG,
				" - tx_free_thresh = %lu [RTE_PMD_NGBE_TX_MAX_BURST=%lu]",
				(unsigned long)txq->tx_free_thresh,
				(unsigned long)RTE_PMD_NGBE_TX_MAX_BURST);
		dev->tx_pkt_burst = ngbe_xmit_pkts;
		dev->tx_pkt_prepare = ngbe_prep_pkts;
	}
}

static const struct {
	eth_tx_burst_t pkt_burst;