examples/netmap_compat/bridge/bridge.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <fcntl.h>
   6 #include <getopt.h>
   7 #include <inttypes.h>
   8 #include <signal.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <sys/mman.h>
  12
  13 #include <rte_eal.h>
  14 #include <rte_ethdev.h>
  15 #include <rte_mbuf.h>
  16 #include <rte_mempool.h>
  17 #include <rte_string_fns.h>
  18 #include "compat_netmap.h"
  19
  20
  21 #define BUF_SIZE        RTE_MBUF_DEFAULT_DATAROOM
  22 #define MBUF_DATA_SIZE  (BUF_SIZE + RTE_PKTMBUF_HEADROOM)
  23
  24 #define MBUF_PER_POOL   8192
  25
  26 struct rte_eth_conf eth_conf = {
  27         .rxmode = {
  28                 .split_hdr_size = 0,
  29                 .ignore_offload_bitfield = 1,
  30                 .offloads = DEV_RX_OFFLOAD_CRC_STRIP,
  31         },
  32         .txmode = {
  33                 .mq_mode = ETH_MQ_TX_NONE,
  34         },
  35 };
  36
  37 #define MAX_QUEUE_NUM   1
  38 #define RX_QUEUE_NUM    1
  39 #define TX_QUEUE_NUM    1
  40
  41 #define MAX_DESC_NUM    0x400
  42 #define RX_DESC_NUM     0x100
  43 #define TX_DESC_NUM     0x200
  44
  45 #define RX_SYNC_NUM     0x20
  46 #define TX_SYNC_NUM     0x20
  47
  48 struct rte_netmap_port_conf port_conf = {
  49         .eth_conf = &eth_conf,
  50         .socket_id = SOCKET_ID_ANY,
  51         .nr_tx_rings = TX_QUEUE_NUM,
  52         .nr_rx_rings = RX_QUEUE_NUM,
  53         .nr_tx_slots = TX_DESC_NUM,
  54         .nr_rx_slots = RX_DESC_NUM,
  55         .tx_burst = TX_SYNC_NUM,
  56         .rx_burst = RX_SYNC_NUM,
  57 };
  58
  59 struct rte_netmap_conf netmap_conf = {
  60         .socket_id = SOCKET_ID_ANY,
  61         .max_bufsz = BUF_SIZE,
  62         .max_rings = MAX_QUEUE_NUM,
  63         .max_slots = MAX_DESC_NUM,
  64 };
  65
  66 static int stop = 0;
  67
  68 #define MAX_PORT_NUM    2
  69
  70 struct netmap_port {
  71         int fd;
  72         struct netmap_if *nmif;
  73         struct netmap_ring *rx_ring;
  74         struct netmap_ring *tx_ring;
  75         const char *str;
  76         uint8_t id;
  77 };
  78
  79 static struct {
  80         uint32_t num;
  81         struct netmap_port p[MAX_PORT_NUM];
  82         void *mem;
  83 } ports;
  84
  85 static void
  86 usage(const char *prgname)
  87 {
  88         fprintf(stderr, "Usage: %s [EAL args] -- [OPTION]...\n"
  89                 "-h, --help   \t Show this help message and exit\n"
  90                 "-i INTERFACE_A   \t Interface (DPDK port number) to use\n"
  91                 "[ -i INTERFACE_B   \t Interface (DPDK port number) to use ]\n",
  92                 prgname);
  93 }
  94
  95 static uint8_t
  96 parse_portid(const char *portid_str)
  97 {
  98         char *end;
  99         unsigned id;
 100
 101         id = strtoul(portid_str, &end, 10);
 102
 103         if (end == portid_str || *end != '\0' || id > RTE_MAX_ETHPORTS)
 104                 rte_exit(EXIT_FAILURE, "Invalid port number\n");
 105
 106         return (uint8_t) id;
 107 }
 108
 109 static int
 110 parse_args(int argc, char **argv)
 111 {
 112         int opt;
 113
 114         while ((opt = getopt(argc, argv, "hi:")) != -1) {
 115                 switch (opt) {
 116                 case 'h':
 117                         usage(argv[0]);
 118                         rte_exit(EXIT_SUCCESS, "exiting...");
 119                         break;
 120                 case 'i':
 121                         if (ports.num >= RTE_DIM(ports.p)) {
 122                                 usage(argv[0]);
 123                                 rte_exit(EXIT_FAILURE, "configs with %u "
 124                                         "ports are not supported\n",
 125                                         ports.num + 1);
 126
 127                         }
 128
 129                         ports.p[ports.num].str = optarg;
 130                         ports.p[ports.num].id = parse_portid(optarg);
 131                         ports.num++;
 132                         break;
 133                 default:
 134                         usage(argv[0]);
 135                         rte_exit(EXIT_FAILURE, "invalid option: %c\n", opt);
 136                 }
 137         }
 138
 139         return 0;
 140 }
 141
 142 static void sigint_handler(__rte_unused int sig)
 143 {
 144         stop = 1;
 145         signal(SIGINT, SIG_DFL);
 146 }
 147
 148 static void move(int n, struct netmap_ring *rx, struct netmap_ring *tx)
 149 {
 150         uint32_t tmp;
 151
 152         while (n-- > 0) {
 153                 tmp = tx->slot[tx->cur].buf_idx;
 154
 155                 tx->slot[tx->cur].buf_idx = rx->slot[rx->cur].buf_idx;
 156                 tx->slot[tx->cur].len     = rx->slot[rx->cur].len;
 157                 tx->slot[tx->cur].flags  |= NS_BUF_CHANGED;
 158                 tx->cur = NETMAP_RING_NEXT(tx, tx->cur);
 159                 tx->avail--;
 160
 161                 rx->slot[rx->cur].buf_idx = tmp;
 162                 rx->slot[rx->cur].flags  |= NS_BUF_CHANGED;
 163                 rx->cur = NETMAP_RING_NEXT(rx, rx->cur);
 164                 rx->avail--;
 165         }
 166 }
 167
 168 static int
 169 netmap_port_open(uint32_t idx)
 170 {
 171         int err;
 172         struct netmap_port *port;
 173         struct nmreq req;
 174
 175         port = ports.p + idx;
 176
 177         port->fd = rte_netmap_open("/dev/netmap", O_RDWR);
 178
 179         snprintf(req.nr_name, sizeof(req.nr_name), "%s", port->str);
 180         req.nr_version = NETMAP_API;
 181         req.nr_ringid = 0;
 182
 183         err = rte_netmap_ioctl(port->fd, NIOCGINFO, &req);
 184         if (err) {
 185                 printf("[E] NIOCGINFO ioctl failed (error %d)\n", err);
 186                 return err;
 187         }
 188
 189         snprintf(req.nr_name, sizeof(req.nr_name), "%s", port->str);
 190         req.nr_version = NETMAP_API;
 191         req.nr_ringid = 0;
 192
 193         err = rte_netmap_ioctl(port->fd, NIOCREGIF, &req);
 194         if (err) {
 195                 printf("[E] NIOCREGIF ioctl failed (error %d)\n", err);
 196                 return err;
 197         }
 198
 199         /* mmap only once. */
 200         if (ports.mem == NULL)
 201                 ports.mem = rte_netmap_mmap(NULL, req.nr_memsize,
 202                         PROT_WRITE | PROT_READ, MAP_PRIVATE, port->fd, 0);
 203
 204         if (ports.mem == MAP_FAILED) {
 205                 printf("[E] NETMAP mmap failed for fd: %d)\n", port->fd);
 206                 return -ENOMEM;
 207         }
 208
 209         port->nmif = NETMAP_IF(ports.mem, req.nr_offset);
 210
 211         port->tx_ring = NETMAP_TXRING(port->nmif, 0);
 212         port->rx_ring = NETMAP_RXRING(port->nmif, 0);
 213
 214         return 0;
 215 }
 216
 217
 218 int main(int argc, char *argv[])
 219 {
 220         int err, ret;
 221         uint32_t i, pmsk;
 222         struct nmreq req;
 223         struct pollfd pollfd[MAX_PORT_NUM];
 224         struct rte_mempool *pool;
 225         struct netmap_ring *rx_ring, *tx_ring;
 226
 227         ret = rte_eal_init(argc, argv);
 228         if (ret < 0)
 229                 rte_exit(EXIT_FAILURE, "Cannot initialize EAL\n");
 230
 231         argc -= ret;
 232         argv += ret;
 233
 234         parse_args(argc, argv);
 235
 236         if (ports.num == 0)
 237                 rte_exit(EXIT_FAILURE, "no ports specified\n");
 238
 239         if (rte_eth_dev_count() < 1)
 240                 rte_exit(EXIT_FAILURE, "Not enough ethernet ports available\n");
 241
 242         pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL, 32, 0,
 243                 MBUF_DATA_SIZE, rte_socket_id());
 244         if (pool == NULL)
 245                 rte_exit(EXIT_FAILURE, "Couldn't create mempool\n");
 246
 247         netmap_conf.socket_id = rte_socket_id();
 248         err = rte_netmap_init(&netmap_conf);
 249
 250         if (err < 0)
 251                 rte_exit(EXIT_FAILURE,
 252                         "Couldn't initialize librte_compat_netmap\n");
 253         else
 254                 printf("librte_compat_netmap initialized\n");
 255
 256         port_conf.pool = pool;
 257         port_conf.socket_id = rte_socket_id();
 258
 259         for (i = 0; i != ports.num; i++) {
 260
 261                 err = rte_netmap_init_port(ports.p[i].id, &port_conf);
 262                 if (err < 0)
 263                         rte_exit(EXIT_FAILURE, "Couldn't setup port %hhu\n",
 264                                 ports.p[i].id);
 265
 266                 rte_eth_promiscuous_enable(ports.p[i].id);
 267         }
 268
 269         for (i = 0; i != ports.num; i++) {
 270
 271                 err = netmap_port_open(i);
 272                 if (err) {
 273                         rte_exit(EXIT_FAILURE, "Couldn't set port %hhu "
 274                                 "under NETMAP control\n",
 275                                 ports.p[i].id);
 276                 }
 277                 else
 278                         printf("Port %hhu now in Netmap mode\n", ports.p[i].id);
 279         }
 280
 281         memset(pollfd, 0, sizeof(pollfd));
 282
 283         for (i = 0; i != ports.num; i++) {
 284                 pollfd[i].fd = ports.p[i].fd;
 285                 pollfd[i].events = POLLIN | POLLOUT;
 286         }
 287
 288         signal(SIGINT, sigint_handler);
 289
 290         pmsk = ports.num - 1;
 291
 292         printf("Bridge up and running!\n");
 293
 294         while (!stop) {
 295                 uint32_t n_pkts;
 296
 297                 pollfd[0].revents = 0;
 298                 pollfd[1].revents = 0;
 299
 300                 ret = rte_netmap_poll(pollfd, ports.num, 0);
 301                 if (ret < 0) {
 302                         stop = 1;
 303                         printf("[E] poll returned with error %d\n", ret);
 304                 }
 305
 306                 if (((pollfd[0].revents | pollfd[1].revents) & POLLERR) != 0) {
 307                         printf("POLLERR!\n");
 308                 }
 309
 310                 if ((pollfd[0].revents & POLLIN) != 0 &&
 311                                 (pollfd[pmsk].revents & POLLOUT) != 0) {
 312
 313                         rx_ring = ports.p[0].rx_ring;
 314                         tx_ring = ports.p[pmsk].tx_ring;
 315
 316                         n_pkts = RTE_MIN(rx_ring->avail, tx_ring->avail);
 317                         move(n_pkts, rx_ring, tx_ring);
 318                 }
 319
 320                 if (pmsk != 0 && (pollfd[pmsk].revents & POLLIN) != 0 &&
 321                                 (pollfd[0].revents & POLLOUT) != 0) {
 322
 323                         rx_ring = ports.p[pmsk].rx_ring;
 324                         tx_ring = ports.p[0].tx_ring;
 325
 326                         n_pkts = RTE_MIN(rx_ring->avail, tx_ring->avail);
 327                         move(n_pkts, rx_ring, tx_ring);
 328                 }
 329         }
 330
 331         printf("Bridge stopped!\n");
 332
 333         for (i = 0; i != ports.num; i++) {
 334                 err = rte_netmap_ioctl(ports.p[i].fd, NIOCUNREGIF, &req);
 335                 if (err) {
 336                         printf("[E] NIOCUNREGIF ioctl failed (error %d)\n",
 337                                 err);
 338                 }
 339                 else
 340                         printf("Port %hhu unregistered from Netmap mode\n", ports.p[i].id);
 341
 342                 rte_netmap_close(ports.p[i].fd);
 343         }
 344         return 0;
 345 }