Function main

dpdk/examples/dma/dmafwd.c:1046–1154

}

int
main(int argc, char **argv)
{
	int ret;
	uint16_t nb_ports, portid;
	uint32_t i;
	unsigned int nb_mbufs;
	size_t sz;

	/* Init EAL. 8< */
	ret = rte_eal_init(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
	/* >8 End of init EAL. */
	argc -= ret;
	argv += ret;

	force_quit = false;
	signal(SIGINT, signal_handler);
	signal(SIGTERM, signal_handler);
	signal(SIGUSR1, signal_handler);

	nb_ports = rte_eth_dev_count_avail();
	if (nb_ports == 0)
		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");

	/* Parse application arguments (after the EAL ones) */
	ret = dma_parse_args(argc, argv, nb_ports);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid DMA arguments\n");

	/* Allocates mempool to hold the mbufs. 8< */
	nb_mbufs = RTE_MAX(nb_ports * (nb_queues * (nb_rxd + nb_txd +
		4 * MAX_PKT_BURST + ring_size) + ring_size +
		rte_lcore_count() * MEMPOOL_CACHE_SIZE),
		MIN_POOL_SIZE);

	/* Create the mbuf pool */
	sz = max_frame_size + RTE_PKTMBUF_HEADROOM;
	sz = RTE_MAX(sz, (size_t)RTE_MBUF_DEFAULT_BUF_SIZE);
	dma_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", nb_mbufs,
		MEMPOOL_CACHE_SIZE, 0, sz, rte_socket_id());
	if (dma_pktmbuf_pool == NULL)
		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
	/* >8 End of allocates mempool to hold the mbufs. */

	if (force_min_copy_size >
		(uint32_t)(rte_pktmbuf_data_room_size(dma_pktmbuf_pool) -
			   RTE_PKTMBUF_HEADROOM))
		rte_exit(EXIT_FAILURE,
			 "Force min copy size > packet mbuf size\n");

	/* Initialize each port. 8< */
	cfg.nb_ports = 0;
	RTE_ETH_FOREACH_DEV(portid)
		port_init(portid, dma_pktmbuf_pool, nb_queues);
	/* >8 End of initializing each port. */