ceph/src/seastar/dpdk/examples/l2fwd-cat/l2fwd-cat.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  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
  16  *       distribution.
  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.
  20  *
  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.
  32  */
  33
  34 #include <stdint.h>
  35 #include <inttypes.h>
  36 #include <rte_eal.h>
  37 #include <rte_ethdev.h>
  38 #include <rte_cycles.h>
  39 #include <rte_lcore.h>
  40 #include <rte_mbuf.h>
  41
  42 #include "cat.h"
  43
  44 #define RX_RING_SIZE 128
  45 #define TX_RING_SIZE 512
  46
  47 #define NUM_MBUFS 8191
  48 #define MBUF_CACHE_SIZE 250
  49 #define BURST_SIZE 32
  50
  51 static const struct rte_eth_conf port_conf_default = {
  52         .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
  53 };
  54
  55 /* l2fwd-cat.c: CAT enabled, basic DPDK skeleton forwarding example. */
  56
  57 /*
  58  * Initializes a given port using global settings and with the RX buffers
  59  * coming from the mbuf_pool passed as a parameter.
  60  */
  61 static inline int
  62 port_init(uint8_t port, struct rte_mempool *mbuf_pool)
  63 {
  64         struct rte_eth_conf port_conf = port_conf_default;
  65         const uint16_t rx_rings = 1, tx_rings = 1;
  66         int retval;
  67         uint16_t q;
  68
  69         if (port >= rte_eth_dev_count())
  70                 return -1;
  71
  72         /* Configure the Ethernet device. */
  73         retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
  74         if (retval != 0)
  75                 return retval;
  76
  77         /* Allocate and set up 1 RX queue per Ethernet port. */
  78         for (q = 0; q < rx_rings; q++) {
  79                 retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
  80                                 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
  81                 if (retval < 0)
  82                         return retval;
  83         }
  84
  85         /* Allocate and set up 1 TX queue per Ethernet port. */
  86         for (q = 0; q < tx_rings; q++) {
  87                 retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
  88                                 rte_eth_dev_socket_id(port), NULL);
  89                 if (retval < 0)
  90                         return retval;
  91         }
  92
  93         /* Start the Ethernet port. */
  94         retval = rte_eth_dev_start(port);
  95         if (retval < 0)
  96                 return retval;
  97
  98         /* Display the port MAC address. */
  99         struct ether_addr addr;
 100         rte_eth_macaddr_get(port, &addr);
 101         printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
 102                            " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
 103                         (unsigned)port,
 104                         addr.addr_bytes[0], addr.addr_bytes[1],
 105                         addr.addr_bytes[2], addr.addr_bytes[3],
 106                         addr.addr_bytes[4], addr.addr_bytes[5]);
 107
 108         /* Enable RX in promiscuous mode for the Ethernet device. */
 109         rte_eth_promiscuous_enable(port);
 110
 111         return 0;
 112 }
 113
 114 /*
 115  * The lcore main. This is the main thread that does the work, reading from
 116  * an input port and writing to an output port.
 117  */
 118 static __attribute__((noreturn)) void
 119 lcore_main(void)
 120 {
 121         const uint8_t nb_ports = rte_eth_dev_count();
 122         uint8_t port;
 123
 124         /*
 125          * Check that the port is on the same NUMA node as the polling thread
 126          * for best performance.
 127          */
 128         for (port = 0; port < nb_ports; port++)
 129                 if (rte_eth_dev_socket_id(port) > 0 &&
 130                                 rte_eth_dev_socket_id(port) !=
 131                                                 (int)rte_socket_id())
 132                         printf("WARNING, port %u is on remote NUMA node to "
 133                                         "polling thread.\n\tPerformance will "
 134                                         "not be optimal.\n", port);
 135
 136         printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
 137                         rte_lcore_id());
 138
 139         /* Run until the application is quit or killed. */
 140         for (;;) {
 141                 /*
 142                  * Receive packets on a port and forward them on the paired
 143                  * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
 144                  */
 145                 for (port = 0; port < nb_ports; port++) {
 146
 147                         /* Get burst of RX packets, from first port of pair. */
 148                         struct rte_mbuf *bufs[BURST_SIZE];
 149                         const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
 150                                         bufs, BURST_SIZE);
 151
 152                         if (unlikely(nb_rx == 0))
 153                                 continue;
 154
 155                         /* Send burst of TX packets, to second port of pair. */
 156                         const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
 157                                         bufs, nb_rx);
 158
 159                         /* Free any unsent packets. */
 160                         if (unlikely(nb_tx < nb_rx)) {
 161                                 uint16_t buf;
 162                                 for (buf = nb_tx; buf < nb_rx; buf++)
 163                                         rte_pktmbuf_free(bufs[buf]);
 164                         }
 165                 }
 166         }
 167 }
 168
 169 /*
 170  * The main function, which does initialization and calls the per-lcore
 171  * functions.
 172  */
 173 int
 174 main(int argc, char *argv[])
 175 {
 176         struct rte_mempool *mbuf_pool;
 177         unsigned nb_ports;
 178         uint8_t portid;
 179
 180         /* Initialize the Environment Abstraction Layer (EAL). */
 181         int ret = rte_eal_init(argc, argv);
 182         if (ret < 0)
 183                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
 184
 185         argc -= ret;
 186         argv += ret;
 187
 188         /*
 189          * Initialize the PQoS library and configure CAT.
 190          * Please see l2fwd-cat documentation for more info.
 191          */
 192         ret = cat_init(argc, argv);
 193         if (ret < 0)
 194                 rte_exit(EXIT_FAILURE, "PQOS: L3CA init failed!\n");
 195
 196         argc -= ret;
 197         argv += ret;
 198
 199         /* Check that there is an even number of ports to send/receive on. */
 200         nb_ports = rte_eth_dev_count();
 201         if (nb_ports < 2 || (nb_ports & 1))
 202                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 203
 204         /* Creates a new mempool in memory to hold the mbufs. */
 205         mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
 206                 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 207
 208         if (mbuf_pool == NULL)
 209                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 210
 211         /* Initialize all ports. */
 212         for (portid = 0; portid < nb_ports; portid++)
 213                 if (port_init(portid, mbuf_pool) != 0)
 214                         rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8 "\n",
 215                                         portid);
 216
 217         if (rte_lcore_count() > 1)
 218                 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
 219
 220         /* Call lcore_main on the master core only. */
 221         lcore_main();
 222
 223         return 0;
 224 }