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