drivers/nfb: simple support for multi-queue

This can minimize type0 descriptors to be generated when each queue uses
own pool.

Author: martinspinler

drivers/net/nfb/nfb_ethdev.c

@@ -375,6 +375,7 @@ nfb_eth_dev_info(struct rte_eth_dev *dev,
 	dev_info->max_rx_pktlen = (uint32_t)-1;
 	dev_info->max_rx_queues = priv->max_rx_queues;
 	dev_info->max_tx_queues = priv->max_tx_queues;
+	dev_info->max_rx_mempools = priv->max_rx_queues;
 	dev_info->speed_capa = RTE_ETH_LINK_SPEED_FIXED;
 	dev_info->rx_offload_capa =
 		RTE_ETH_RX_OFFLOAD_TIMESTAMP;

drivers/net/nfb/nfb_rx.c

@@ -82,6 +82,11 @@ nfb_eth_rx_queue_setup(struct rte_eth_dev *dev,
 	int nfb_qid;
 	int ret;
 
+	int nmp;
+	if (rx_conf->rx_nmempool > 0) {
+		nmp = rx_queue_id % rx_conf->rx_nmempool;
+		mb_pool = rx_conf->rx_mempools[nmp];
+	}
 	rxq = rte_zmalloc_socket("ndp rx queue",
 			sizeof(struct ndp_rx_queue),
 			RTE_CACHE_LINE_SIZE, socket_id);