4 * Copyright(c) 2016 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <rte_ethdev.h>
38 #include <rte_cycles.h>
39 #include <rte_lcore.h>
44 #define RX_RING_SIZE 128
45 #define TX_RING_SIZE 512
47 #define NUM_MBUFS 8191
48 #define MBUF_CACHE_SIZE 250
51 static const struct rte_eth_conf port_conf_default = {
52 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
55 /* l2fwd-cat.c: CAT enabled, basic DPDK skeleton forwarding example. */
58 * Initializes a given port using global settings and with the RX buffers
59 * coming from the mbuf_pool passed as a parameter.
62 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
64 struct rte_eth_conf port_conf = port_conf_default;
65 const uint16_t rx_rings = 1, tx_rings = 1;
68 uint16_t nb_rxd = RX_RING_SIZE;
69 uint16_t nb_txd = TX_RING_SIZE;
71 if (port >= rte_eth_dev_count())
74 /* Configure the Ethernet device. */
75 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
79 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
83 /* Allocate and set up 1 RX queue per Ethernet port. */
84 for (q = 0; q < rx_rings; q++) {
85 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
86 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
91 /* Allocate and set up 1 TX queue per Ethernet port. */
92 for (q = 0; q < tx_rings; q++) {
93 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
94 rte_eth_dev_socket_id(port), NULL);
99 /* Start the Ethernet port. */
100 retval = rte_eth_dev_start(port);
104 /* Display the port MAC address. */
105 struct ether_addr addr;
106 rte_eth_macaddr_get(port, &addr);
107 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
108 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
110 addr.addr_bytes[0], addr.addr_bytes[1],
111 addr.addr_bytes[2], addr.addr_bytes[3],
112 addr.addr_bytes[4], addr.addr_bytes[5]);
114 /* Enable RX in promiscuous mode for the Ethernet device. */
115 rte_eth_promiscuous_enable(port);
121 * The lcore main. This is the main thread that does the work, reading from
122 * an input port and writing to an output port.
124 static __attribute__((noreturn)) void
127 const uint16_t nb_ports = rte_eth_dev_count();
131 * Check that the port is on the same NUMA node as the polling thread
132 * for best performance.
134 for (port = 0; port < nb_ports; port++)
135 if (rte_eth_dev_socket_id(port) > 0 &&
136 rte_eth_dev_socket_id(port) !=
137 (int)rte_socket_id())
138 printf("WARNING, port %u is on remote NUMA node to "
139 "polling thread.\n\tPerformance will "
140 "not be optimal.\n", port);
142 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
145 /* Run until the application is quit or killed. */
148 * Receive packets on a port and forward them on the paired
149 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
151 for (port = 0; port < nb_ports; port++) {
153 /* Get burst of RX packets, from first port of pair. */
154 struct rte_mbuf *bufs[BURST_SIZE];
155 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
158 if (unlikely(nb_rx == 0))
161 /* Send burst of TX packets, to second port of pair. */
162 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
165 /* Free any unsent packets. */
166 if (unlikely(nb_tx < nb_rx)) {
168 for (buf = nb_tx; buf < nb_rx; buf++)
169 rte_pktmbuf_free(bufs[buf]);
176 * The main function, which does initialization and calls the per-lcore
180 main(int argc, char *argv[])
182 struct rte_mempool *mbuf_pool;
186 /* Initialize the Environment Abstraction Layer (EAL). */
187 int ret = rte_eal_init(argc, argv);
189 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
195 * Initialize the PQoS library and configure CAT.
196 * Please see l2fwd-cat documentation for more info.
198 ret = cat_init(argc, argv);
200 rte_exit(EXIT_FAILURE, "PQOS: L3CA init failed!\n");
205 /* Check that there is an even number of ports to send/receive on. */
206 nb_ports = rte_eth_dev_count();
207 if (nb_ports < 2 || (nb_ports & 1))
208 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
210 /* Creates a new mempool in memory to hold the mbufs. */
211 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
212 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
214 if (mbuf_pool == NULL)
215 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
217 /* Initialize all ports. */
218 for (portid = 0; portid < nb_ports; portid++)
219 if (port_init(portid, mbuf_pool) != 0)
220 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
223 if (rte_lcore_count() > 1)
224 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
226 /* Call lcore_main on the master core only. */