drivers/net/kni/rte_eth_kni.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Intel Corporation
   3  */
   4
   5 #include <fcntl.h>
   6 #include <pthread.h>
   7 #include <unistd.h>
   8
   9 #include <rte_string_fns.h>
  10 #include <rte_ethdev_driver.h>
  11 #include <rte_ethdev_vdev.h>
  12 #include <rte_kni.h>
  13 #include <rte_kvargs.h>
  14 #include <rte_malloc.h>
  15 #include <rte_bus_vdev.h>
  16
  17 /* Only single queue supported */
  18 #define KNI_MAX_QUEUE_PER_PORT 1
  19
  20 #define MAX_KNI_PORTS 8
  21
  22 #define KNI_ETHER_MTU(mbuf_size)       \
  23         ((mbuf_size) - RTE_ETHER_HDR_LEN) /**< Ethernet MTU. */
  24
  25 #define ETH_KNI_NO_REQUEST_THREAD_ARG   "no_request_thread"
  26 static const char * const valid_arguments[] = {
  27         ETH_KNI_NO_REQUEST_THREAD_ARG,
  28         NULL
  29 };
  30
  31 struct eth_kni_args {
  32         int no_request_thread;
  33 };
  34
  35 struct pmd_queue_stats {
  36         uint64_t pkts;
  37         uint64_t bytes;
  38 };
  39
  40 struct pmd_queue {
  41         struct pmd_internals *internals;
  42         struct rte_mempool *mb_pool;
  43
  44         struct pmd_queue_stats rx;
  45         struct pmd_queue_stats tx;
  46 };
  47
  48 struct pmd_internals {
  49         struct rte_kni *kni;
  50         uint16_t port_id;
  51         int is_kni_started;
  52
  53         pthread_t thread;
  54         int stop_thread;
  55         int no_request_thread;
  56
  57         struct rte_ether_addr eth_addr;
  58
  59         struct pmd_queue rx_queues[KNI_MAX_QUEUE_PER_PORT];
  60         struct pmd_queue tx_queues[KNI_MAX_QUEUE_PER_PORT];
  61 };
  62
  63 static const struct rte_eth_link pmd_link = {
  64                 .link_speed = ETH_SPEED_NUM_10G,
  65                 .link_duplex = ETH_LINK_FULL_DUPLEX,
  66                 .link_status = ETH_LINK_DOWN,
  67                 .link_autoneg = ETH_LINK_FIXED,
  68 };
  69 static int is_kni_initialized;
  70
  71 RTE_LOG_REGISTER(eth_kni_logtype, pmd.net.kni, NOTICE);
  72
  73 #define PMD_LOG(level, fmt, args...) \
  74         rte_log(RTE_LOG_ ## level, eth_kni_logtype, \
  75                 "%s(): " fmt "\n", __func__, ##args)
  76 static uint16_t
  77 eth_kni_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  78 {
  79         struct pmd_queue *kni_q = q;
  80         struct rte_kni *kni = kni_q->internals->kni;
  81         uint16_t nb_pkts;
  82         int i;
  83
  84         nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
  85         for (i = 0; i < nb_pkts; i++)
  86                 bufs[i]->port = kni_q->internals->port_id;
  87
  88         kni_q->rx.pkts += nb_pkts;
  89
  90         return nb_pkts;
  91 }
  92
  93 static uint16_t
  94 eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
  95 {
  96         struct pmd_queue *kni_q = q;
  97         struct rte_kni *kni = kni_q->internals->kni;
  98         uint16_t nb_pkts;
  99
 100         nb_pkts =  rte_kni_tx_burst(kni, bufs, nb_bufs);
 101
 102         kni_q->tx.pkts += nb_pkts;
 103
 104         return nb_pkts;
 105 }
 106
 107 static void *
 108 kni_handle_request(void *param)
 109 {
 110         struct pmd_internals *internals = param;
 111 #define MS 1000
 112
 113         while (!internals->stop_thread) {
 114                 rte_kni_handle_request(internals->kni);
 115                 usleep(500 * MS);
 116         }
 117
 118         return param;
 119 }
 120
 121 static int
 122 eth_kni_start(struct rte_eth_dev *dev)
 123 {
 124         struct pmd_internals *internals = dev->data->dev_private;
 125         uint16_t port_id = dev->data->port_id;
 126         struct rte_mempool *mb_pool;
 127         struct rte_kni_conf conf;
 128         const char *name = dev->device->name + 4; /* remove net_ */
 129
 130         mb_pool = internals->rx_queues[0].mb_pool;
 131         strlcpy(conf.name, name, RTE_KNI_NAMESIZE);
 132         conf.force_bind = 0;
 133         conf.group_id = port_id;
 134         conf.mbuf_size =
 135                 rte_pktmbuf_data_room_size(mb_pool) - RTE_PKTMBUF_HEADROOM;
 136         conf.mtu = KNI_ETHER_MTU(conf.mbuf_size);
 137
 138         internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
 139         if (internals->kni == NULL) {
 140                 PMD_LOG(ERR,
 141                         "Fail to create kni interface for port: %d",
 142                         port_id);
 143                 return -1;
 144         }
 145
 146         return 0;
 147 }
 148
 149 static int
 150 eth_kni_dev_start(struct rte_eth_dev *dev)
 151 {
 152         struct pmd_internals *internals = dev->data->dev_private;
 153         int ret;
 154
 155         if (internals->is_kni_started == 0) {
 156                 ret = eth_kni_start(dev);
 157                 if (ret)
 158                         return -1;
 159                 internals->is_kni_started = 1;
 160         }
 161
 162         if (internals->no_request_thread == 0) {
 163                 internals->stop_thread = 0;
 164
 165                 ret = rte_ctrl_thread_create(&internals->thread,
 166                         "kni_handle_req", NULL,
 167                         kni_handle_request, internals);
 168                 if (ret) {
 169                         PMD_LOG(ERR,
 170                                 "Fail to create kni request thread");
 171                         return -1;
 172                 }
 173         }
 174
 175         dev->data->dev_link.link_status = 1;
 176
 177         return 0;
 178 }
 179
 180 static void
 181 eth_kni_dev_stop(struct rte_eth_dev *dev)
 182 {
 183         struct pmd_internals *internals = dev->data->dev_private;
 184         int ret;
 185
 186         if (internals->no_request_thread == 0 && internals->stop_thread == 0) {
 187                 internals->stop_thread = 1;
 188
 189                 ret = pthread_cancel(internals->thread);
 190                 if (ret)
 191                         PMD_LOG(ERR, "Can't cancel the thread");
 192
 193                 ret = pthread_join(internals->thread, NULL);
 194                 if (ret)
 195                         PMD_LOG(ERR, "Can't join the thread");
 196         }
 197
 198         dev->data->dev_link.link_status = 0;
 199 }
 200
 201 static int
 202 eth_kni_close(struct rte_eth_dev *eth_dev)
 203 {
 204         struct pmd_internals *internals;
 205         int ret;
 206
 207         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 208                 return 0;
 209
 210         eth_kni_dev_stop(eth_dev);
 211
 212         /* mac_addrs must not be freed alone because part of dev_private */
 213         eth_dev->data->mac_addrs = NULL;
 214
 215         internals = eth_dev->data->dev_private;
 216         ret = rte_kni_release(internals->kni);
 217         if (ret)
 218                 PMD_LOG(WARNING, "Not able to release kni for %s",
 219                         eth_dev->data->name);
 220
 221         return 0;
 222 }
 223
 224 static int
 225 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
 226 {
 227         return 0;
 228 }
 229
 230 static int
 231 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
 232                 struct rte_eth_dev_info *dev_info)
 233 {
 234         dev_info->max_mac_addrs = 1;
 235         dev_info->max_rx_pktlen = UINT32_MAX;
 236         dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
 237         dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
 238         dev_info->min_rx_bufsize = 0;
 239
 240         return 0;
 241 }
 242
 243 static int
 244 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
 245                 uint16_t rx_queue_id,
 246                 uint16_t nb_rx_desc __rte_unused,
 247                 unsigned int socket_id __rte_unused,
 248                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 249                 struct rte_mempool *mb_pool)
 250 {
 251         struct pmd_internals *internals = dev->data->dev_private;
 252         struct pmd_queue *q;
 253
 254         q = &internals->rx_queues[rx_queue_id];
 255         q->internals = internals;
 256         q->mb_pool = mb_pool;
 257
 258         dev->data->rx_queues[rx_queue_id] = q;
 259
 260         return 0;
 261 }
 262
 263 static int
 264 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
 265                 uint16_t tx_queue_id,
 266                 uint16_t nb_tx_desc __rte_unused,
 267                 unsigned int socket_id __rte_unused,
 268                 const struct rte_eth_txconf *tx_conf __rte_unused)
 269 {
 270         struct pmd_internals *internals = dev->data->dev_private;
 271         struct pmd_queue *q;
 272
 273         q = &internals->tx_queues[tx_queue_id];
 274         q->internals = internals;
 275
 276         dev->data->tx_queues[tx_queue_id] = q;
 277
 278         return 0;
 279 }
 280
 281 static void
 282 eth_kni_queue_release(void *q __rte_unused)
 283 {
 284 }
 285
 286 static int
 287 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
 288                 int wait_to_complete __rte_unused)
 289 {
 290         return 0;
 291 }
 292
 293 static int
 294 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 295 {
 296         unsigned long rx_packets_total = 0, rx_bytes_total = 0;
 297         unsigned long tx_packets_total = 0, tx_bytes_total = 0;
 298         struct rte_eth_dev_data *data = dev->data;
 299         unsigned int i, num_stats;
 300         struct pmd_queue *q;
 301
 302         num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 303                         data->nb_rx_queues);
 304         for (i = 0; i < num_stats; i++) {
 305                 q = data->rx_queues[i];
 306                 stats->q_ipackets[i] = q->rx.pkts;
 307                 stats->q_ibytes[i] = q->rx.bytes;
 308                 rx_packets_total += stats->q_ipackets[i];
 309                 rx_bytes_total += stats->q_ibytes[i];
 310         }
 311
 312         num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 313                         data->nb_tx_queues);
 314         for (i = 0; i < num_stats; i++) {
 315                 q = data->tx_queues[i];
 316                 stats->q_opackets[i] = q->tx.pkts;
 317                 stats->q_obytes[i] = q->tx.bytes;
 318                 tx_packets_total += stats->q_opackets[i];
 319                 tx_bytes_total += stats->q_obytes[i];
 320         }
 321
 322         stats->ipackets = rx_packets_total;
 323         stats->ibytes = rx_bytes_total;
 324         stats->opackets = tx_packets_total;
 325         stats->obytes = tx_bytes_total;
 326
 327         return 0;
 328 }
 329
 330 static int
 331 eth_kni_stats_reset(struct rte_eth_dev *dev)
 332 {
 333         struct rte_eth_dev_data *data = dev->data;
 334         struct pmd_queue *q;
 335         unsigned int i;
 336
 337         for (i = 0; i < data->nb_rx_queues; i++) {
 338                 q = data->rx_queues[i];
 339                 q->rx.pkts = 0;
 340                 q->rx.bytes = 0;
 341         }
 342         for (i = 0; i < data->nb_tx_queues; i++) {
 343                 q = data->tx_queues[i];
 344                 q->tx.pkts = 0;
 345                 q->tx.bytes = 0;
 346         }
 347
 348         return 0;
 349 }
 350
 351 static const struct eth_dev_ops eth_kni_ops = {
 352         .dev_start = eth_kni_dev_start,
 353         .dev_stop = eth_kni_dev_stop,
 354         .dev_close = eth_kni_close,
 355         .dev_configure = eth_kni_dev_configure,
 356         .dev_infos_get = eth_kni_dev_info,
 357         .rx_queue_setup = eth_kni_rx_queue_setup,
 358         .tx_queue_setup = eth_kni_tx_queue_setup,
 359         .rx_queue_release = eth_kni_queue_release,
 360         .tx_queue_release = eth_kni_queue_release,
 361         .link_update = eth_kni_link_update,
 362         .stats_get = eth_kni_stats_get,
 363         .stats_reset = eth_kni_stats_reset,
 364 };
 365
 366 static struct rte_eth_dev *
 367 eth_kni_create(struct rte_vdev_device *vdev,
 368                 struct eth_kni_args *args,
 369                 unsigned int numa_node)
 370 {
 371         struct pmd_internals *internals;
 372         struct rte_eth_dev_data *data;
 373         struct rte_eth_dev *eth_dev;
 374
 375         PMD_LOG(INFO, "Creating kni ethdev on numa socket %u",
 376                         numa_node);
 377
 378         /* reserve an ethdev entry */
 379         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
 380         if (!eth_dev)
 381                 return NULL;
 382
 383         internals = eth_dev->data->dev_private;
 384         internals->port_id = eth_dev->data->port_id;
 385         data = eth_dev->data;
 386         data->nb_rx_queues = 1;
 387         data->nb_tx_queues = 1;
 388         data->dev_link = pmd_link;
 389         data->mac_addrs = &internals->eth_addr;
 390         data->promiscuous = 1;
 391         data->all_multicast = 1;
 392
 393         rte_eth_random_addr(internals->eth_addr.addr_bytes);
 394
 395         eth_dev->dev_ops = &eth_kni_ops;
 396
 397         internals->no_request_thread = args->no_request_thread;
 398
 399         return eth_dev;
 400 }
 401
 402 static int
 403 kni_init(void)
 404 {
 405         if (is_kni_initialized == 0)
 406                 rte_kni_init(MAX_KNI_PORTS);
 407
 408         is_kni_initialized++;
 409
 410         return 0;
 411 }
 412
 413 static int
 414 eth_kni_kvargs_process(struct eth_kni_args *args, const char *params)
 415 {
 416         struct rte_kvargs *kvlist;
 417
 418         kvlist = rte_kvargs_parse(params, valid_arguments);
 419         if (kvlist == NULL)
 420                 return -1;
 421
 422         memset(args, 0, sizeof(struct eth_kni_args));
 423
 424         if (rte_kvargs_count(kvlist, ETH_KNI_NO_REQUEST_THREAD_ARG) == 1)
 425                 args->no_request_thread = 1;
 426
 427         rte_kvargs_free(kvlist);
 428
 429         return 0;
 430 }
 431
 432 static int
 433 eth_kni_probe(struct rte_vdev_device *vdev)
 434 {
 435         struct rte_eth_dev *eth_dev;
 436         struct eth_kni_args args;
 437         const char *name;
 438         const char *params;
 439         int ret;
 440
 441         name = rte_vdev_device_name(vdev);
 442         params = rte_vdev_device_args(vdev);
 443         PMD_LOG(INFO, "Initializing eth_kni for %s", name);
 444
 445         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 446                 eth_dev = rte_eth_dev_attach_secondary(name);
 447                 if (!eth_dev) {
 448                         PMD_LOG(ERR, "Failed to probe %s", name);
 449                         return -1;
 450                 }
 451                 /* TODO: request info from primary to set up Rx and Tx */
 452                 eth_dev->dev_ops = &eth_kni_ops;
 453                 eth_dev->device = &vdev->device;
 454                 rte_eth_dev_probing_finish(eth_dev);
 455                 return 0;
 456         }
 457
 458         ret = eth_kni_kvargs_process(&args, params);
 459         if (ret < 0)
 460                 return ret;
 461
 462         ret = kni_init();
 463         if (ret < 0)
 464                 return ret;
 465
 466         eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
 467         if (eth_dev == NULL)
 468                 goto kni_uninit;
 469
 470         eth_dev->rx_pkt_burst = eth_kni_rx;
 471         eth_dev->tx_pkt_burst = eth_kni_tx;
 472
 473         rte_eth_dev_probing_finish(eth_dev);
 474         return 0;
 475
 476 kni_uninit:
 477         is_kni_initialized--;
 478         if (is_kni_initialized == 0)
 479                 rte_kni_close();
 480         return -1;
 481 }
 482
 483 static int
 484 eth_kni_remove(struct rte_vdev_device *vdev)
 485 {
 486         struct rte_eth_dev *eth_dev;
 487         const char *name;
 488
 489         name = rte_vdev_device_name(vdev);
 490         PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
 491
 492         /* find the ethdev entry */
 493         eth_dev = rte_eth_dev_allocated(name);
 494         if (eth_dev != NULL) {
 495                 if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 496                         eth_kni_dev_stop(eth_dev);
 497                         return rte_eth_dev_release_port(eth_dev);
 498                 }
 499                 eth_kni_close(eth_dev);
 500                 rte_eth_dev_release_port(eth_dev);
 501         }
 502
 503         is_kni_initialized--;
 504         if (is_kni_initialized == 0)
 505                 rte_kni_close();
 506
 507         return 0;
 508 }
 509
 510 static struct rte_vdev_driver eth_kni_drv = {
 511         .probe = eth_kni_probe,
 512         .remove = eth_kni_remove,
 513 };
 514
 515 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
 516 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");