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

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <inttypes.h>
   7 #include <rte_eal.h>
   8 #include <rte_ethdev.h>
   9 #include <rte_cycles.h>
  10 #include <rte_lcore.h>
  11 #include <rte_mbuf.h>
  12
  13 #include "cat.h"
  14
  15 #define RX_RING_SIZE 128
  16 #define TX_RING_SIZE 512
  17
  18 #define NUM_MBUFS 8191
  19 #define MBUF_CACHE_SIZE 250
  20 #define BURST_SIZE 32
  21
  22 static const struct rte_eth_conf port_conf_default = {
  23         .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
  24 };
  25
  26 /* l2fwd-cat.c: CAT enabled, basic DPDK skeleton forwarding example. */
  27
  28 /*
  29  * Initializes a given port using global settings and with the RX buffers
  30  * coming from the mbuf_pool passed as a parameter.
  31  */
  32 static inline int
  33 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
  34 {
  35         struct rte_eth_conf port_conf = port_conf_default;
  36         const uint16_t rx_rings = 1, tx_rings = 1;
  37         int retval;
  38         uint16_t q;
  39         uint16_t nb_rxd = RX_RING_SIZE;
  40         uint16_t nb_txd = TX_RING_SIZE;
  41
  42         if (!rte_eth_dev_is_valid_port(port))
  43                 return -1;
  44
  45         /* Configure the Ethernet device. */
  46         retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
  47         if (retval != 0)
  48                 return retval;
  49
  50         retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
  51         if (retval != 0)
  52                 return retval;
  53
  54         /* Allocate and set up 1 RX queue per Ethernet port. */
  55         for (q = 0; q < rx_rings; q++) {
  56                 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
  57                                 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
  58                 if (retval < 0)
  59                         return retval;
  60         }
  61
  62         /* Allocate and set up 1 TX queue per Ethernet port. */
  63         for (q = 0; q < tx_rings; q++) {
  64                 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
  65                                 rte_eth_dev_socket_id(port), NULL);
  66                 if (retval < 0)
  67                         return retval;
  68         }
  69
  70         /* Start the Ethernet port. */
  71         retval = rte_eth_dev_start(port);
  72         if (retval < 0)
  73                 return retval;
  74
  75         /* Display the port MAC address. */
  76         struct ether_addr addr;
  77         rte_eth_macaddr_get(port, &addr);
  78         printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
  79                            " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
  80                         port,
  81                         addr.addr_bytes[0], addr.addr_bytes[1],
  82                         addr.addr_bytes[2], addr.addr_bytes[3],
  83                         addr.addr_bytes[4], addr.addr_bytes[5]);
  84
  85         /* Enable RX in promiscuous mode for the Ethernet device. */
  86         rte_eth_promiscuous_enable(port);
  87
  88         return 0;
  89 }
  90
  91 /*
  92  * The lcore main. This is the main thread that does the work, reading from
  93  * an input port and writing to an output port.
  94  */
  95 static __attribute__((noreturn)) void
  96 lcore_main(void)
  97 {
  98         uint16_t port;
  99
 100         /*
 101          * Check that the port is on the same NUMA node as the polling thread
 102          * for best performance.
 103          */
 104         RTE_ETH_FOREACH_DEV(port)
 105                 if (rte_eth_dev_socket_id(port) > 0 &&
 106                                 rte_eth_dev_socket_id(port) !=
 107                                                 (int)rte_socket_id())
 108                         printf("WARNING, port %u is on remote NUMA node to "
 109                                         "polling thread.\n\tPerformance will "
 110                                         "not be optimal.\n", port);
 111
 112         printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
 113                         rte_lcore_id());
 114
 115         /* Run until the application is quit or killed. */
 116         for (;;) {
 117                 /*
 118                  * Receive packets on a port and forward them on the paired
 119                  * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
 120                  */
 121                 RTE_ETH_FOREACH_DEV(port) {
 122
 123                         /* Get burst of RX packets, from first port of pair. */
 124                         struct rte_mbuf *bufs[BURST_SIZE];
 125                         const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
 126                                         bufs, BURST_SIZE);
 127
 128                         if (unlikely(nb_rx == 0))
 129                                 continue;
 130
 131                         /* Send burst of TX packets, to second port of pair. */
 132                         const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
 133                                         bufs, nb_rx);
 134
 135                         /* Free any unsent packets. */
 136                         if (unlikely(nb_tx < nb_rx)) {
 137                                 uint16_t buf;
 138                                 for (buf = nb_tx; buf < nb_rx; buf++)
 139                                         rte_pktmbuf_free(bufs[buf]);
 140                         }
 141                 }
 142         }
 143 }
 144
 145 /*
 146  * The main function, which does initialization and calls the per-lcore
 147  * functions.
 148  */
 149 int
 150 main(int argc, char *argv[])
 151 {
 152         struct rte_mempool *mbuf_pool;
 153         unsigned nb_ports;
 154         uint16_t portid;
 155
 156         /* Initialize the Environment Abstraction Layer (EAL). */
 157         int ret = rte_eal_init(argc, argv);
 158         if (ret < 0)
 159                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
 160
 161         argc -= ret;
 162         argv += ret;
 163
 164         /*
 165          * Initialize the PQoS library and configure CAT.
 166          * Please see l2fwd-cat documentation for more info.
 167          */
 168         ret = cat_init(argc, argv);
 169         if (ret < 0)
 170                 rte_exit(EXIT_FAILURE, "PQOS: L3CA init failed!\n");
 171
 172         argc -= ret;
 173         argv += ret;
 174
 175         /* Check that there is an even number of ports to send/receive on. */
 176         nb_ports = rte_eth_dev_count_avail();
 177         if (nb_ports < 2 || (nb_ports & 1))
 178                 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 179
 180         /* Creates a new mempool in memory to hold the mbufs. */
 181         mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
 182                 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 183
 184         if (mbuf_pool == NULL)
 185                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 186
 187         /* Initialize all ports. */
 188         RTE_ETH_FOREACH_DEV(portid)
 189                 if (port_init(portid, mbuf_pool) != 0)
 190                         rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu16 "\n",
 191                                         portid);
 192
 193         if (rte_lcore_count() > 1)
 194                 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
 195
 196         /* Call lcore_main on the master core only. */
 197         lcore_main();
 198
 199         return 0;
 200 }