1 files changed, 212 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/rxtx_callbacks/main.c b/src/spdk/dpdk/examples/rxtx_callbacks/main.c
new file mode 100644
index 00000000..2058be62
--- /dev/null
+++ b/src/spdk/dpdk/examples/rxtx_callbacks/main.c
@@ -0,0 +1,212 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation
+ */
+
+#include <stdint.h>
+#include <inttypes.h>
+#include <rte_eal.h>
+#include <rte_ethdev.h>
+#include <rte_cycles.h>
+#include <rte_lcore.h>
+#include <rte_mbuf.h>
+
+#define RX_RING_SIZE 1024
+#define TX_RING_SIZE 1024
+
+#define NUM_MBUFS 8191
+#define MBUF_CACHE_SIZE 250
+#define BURST_SIZE 32
+
+static const struct rte_eth_conf port_conf_default = {
+	.rxmode = {
+		.max_rx_pkt_len = ETHER_MAX_LEN,
+	},
+};
+
+static struct {
+	uint64_t total_cycles;
+	uint64_t total_pkts;
+} latency_numbers;
+
+
+static uint16_t
+add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
+		struct rte_mbuf **pkts, uint16_t nb_pkts,
+		uint16_t max_pkts __rte_unused, void *_ __rte_unused)
+{
+	unsigned i;
+	uint64_t now = rte_rdtsc();
+
+	for (i = 0; i < nb_pkts; i++)
+		pkts[i]->udata64 = now;
+	return nb_pkts;
+}
+
+static uint16_t
+calc_latency(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
+		struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
+{
+	uint64_t cycles = 0;
+	uint64_t now = rte_rdtsc();
+	unsigned i;
+
+	for (i = 0; i < nb_pkts; i++)
+		cycles += now - pkts[i]->udata64;
+	latency_numbers.total_cycles += cycles;
+	latency_numbers.total_pkts += nb_pkts;
+
+	if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
+		printf("Latency = %"PRIu64" cycles\n",
+		latency_numbers.total_cycles / latency_numbers.total_pkts);
+		latency_numbers.total_cycles = latency_numbers.total_pkts = 0;
+	}
+	return nb_pkts;
+}
+
+/*
+ * Initialises a given port using global settings and with the rx buffers
+ * coming from the mbuf_pool passed as parameter
+ */
+static inline int
+port_init(uint16_t port, struct rte_mempool *mbuf_pool)
+{
+	struct rte_eth_conf port_conf = port_conf_default;
+	const uint16_t rx_rings = 1, tx_rings = 1;
+	uint16_t nb_rxd = RX_RING_SIZE;
+	uint16_t nb_txd = TX_RING_SIZE;
+	int retval;
+	uint16_t q;
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_txconf txconf;
+
+	if (!rte_eth_dev_is_valid_port(port))
+		return -1;
+
+	rte_eth_dev_info_get(port, &dev_info);
+	if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
+		port_conf.txmode.offloads |=
+			DEV_TX_OFFLOAD_MBUF_FAST_FREE;
+
+	retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
+	if (retval != 0)
+		return retval;
+
+	retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
+	if (retval != 0)
+		return retval;
+
+	for (q = 0; q < rx_rings; q++) {
+		retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
+				rte_eth_dev_socket_id(port), NULL, mbuf_pool);
+		if (retval < 0)
+			return retval;
+	}
+
+	txconf = dev_info.default_txconf;
+	txconf.offloads = port_conf.txmode.offloads;
+	for (q = 0; q < tx_rings; q++) {
+		retval = rte_eth_tx_queue_setup(port, q, nb_txd,
+				rte_eth_dev_socket_id(port), &txconf);
+		if (retval < 0)
+			return retval;
+	}
+
+	retval  = rte_eth_dev_start(port);
+	if (retval < 0)
+		return retval;
+
+	struct ether_addr addr;
+
+	rte_eth_macaddr_get(port, &addr);
+	printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
+			" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
+			(unsigned)port,
+			addr.addr_bytes[0], addr.addr_bytes[1],
+			addr.addr_bytes[2], addr.addr_bytes[3],
+			addr.addr_bytes[4], addr.addr_bytes[5]);
+
+	rte_eth_promiscuous_enable(port);
+	rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
+	rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
+
+	return 0;
+}
+
+/*
+ * Main thread that does the work, reading from INPUT_PORT
+ * and writing to OUTPUT_PORT
+ */
+static  __attribute__((noreturn)) void
+lcore_main(void)
+{
+	uint16_t port;
+
+	RTE_ETH_FOREACH_DEV(port)
+		if (rte_eth_dev_socket_id(port) > 0 &&
+				rte_eth_dev_socket_id(port) !=
+						(int)rte_socket_id())
+			printf("WARNING, port %u is on remote NUMA node to "
+					"polling thread.\n\tPerformance will "
+					"not be optimal.\n", port);
+
+	printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
+			rte_lcore_id());
+	for (;;) {
+		RTE_ETH_FOREACH_DEV(port) {
+			struct rte_mbuf *bufs[BURST_SIZE];
+			const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
+					bufs, BURST_SIZE);
+			if (unlikely(nb_rx == 0))
+				continue;
+			const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
+					bufs, nb_rx);
+			if (unlikely(nb_tx < nb_rx)) {
+				uint16_t buf;
+
+				for (buf = nb_tx; buf < nb_rx; buf++)
+					rte_pktmbuf_free(bufs[buf]);
+			}
+		}
+	}
+}
+
+/* Main function, does initialisation and calls the per-lcore functions */
+int
+main(int argc, char *argv[])
+{
+	struct rte_mempool *mbuf_pool;
+	uint16_t nb_ports;
+	uint16_t portid;
+
+	/* init EAL */
+	int ret = rte_eal_init(argc, argv);
+
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+	argc -= ret;
+	argv += ret;
+
+	nb_ports = rte_eth_dev_count_avail();
+	if (nb_ports < 2 || (nb_ports & 1))
+		rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
+
+	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
+		NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
+		RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+	if (mbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+
+	/* initialize all ports */
+	RTE_ETH_FOREACH_DEV(portid)
+		if (port_init(portid, mbuf_pool) != 0)
+			rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
+					portid);
+
+	if (rte_lcore_count() > 1)
+		printf("\nWARNING: Too much enabled lcores - "
+			"App uses only 1 lcore\n");
+
+	/* call lcore_main on master core only */
+	lcore_main();
+	return 0;
+}