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         eth_kni_dev_stop(eth_dev);
 208
 209         /* mac_addrs must not be freed alone because part of dev_private */
 210         eth_dev->data->mac_addrs = NULL;
 211
 212         internals = eth_dev->data->dev_private;
 213         ret = rte_kni_release(internals->kni);
 214         if (ret)
 215                 PMD_LOG(WARNING, "Not able to release kni for %s",
 216                         eth_dev->data->name);
 217
 218         return 0;
 219 }
 220
 221 static int
 222 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
 223 {
 224         return 0;
 225 }
 226
 227 static int
 228 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
 229                 struct rte_eth_dev_info *dev_info)
 230 {
 231         dev_info->max_mac_addrs = 1;
 232         dev_info->max_rx_pktlen = UINT32_MAX;
 233         dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
 234         dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
 235         dev_info->min_rx_bufsize = 0;
 236
 237         return 0;
 238 }
 239
 240 static int
 241 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
 242                 uint16_t rx_queue_id,
 243                 uint16_t nb_rx_desc __rte_unused,
 244                 unsigned int socket_id __rte_unused,
 245                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 246                 struct rte_mempool *mb_pool)
 247 {
 248         struct pmd_internals *internals = dev->data->dev_private;
 249         struct pmd_queue *q;
 250
 251         q = &internals->rx_queues[rx_queue_id];
 252         q->internals = internals;
 253         q->mb_pool = mb_pool;
 254
 255         dev->data->rx_queues[rx_queue_id] = q;
 256
 257         return 0;
 258 }
 259
 260 static int
 261 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
 262                 uint16_t tx_queue_id,
 263                 uint16_t nb_tx_desc __rte_unused,
 264                 unsigned int socket_id __rte_unused,
 265                 const struct rte_eth_txconf *tx_conf __rte_unused)
 266 {
 267         struct pmd_internals *internals = dev->data->dev_private;
 268         struct pmd_queue *q;
 269
 270         q = &internals->tx_queues[tx_queue_id];
 271         q->internals = internals;
 272
 273         dev->data->tx_queues[tx_queue_id] = q;
 274
 275         return 0;
 276 }
 277
 278 static void
 279 eth_kni_queue_release(void *q __rte_unused)
 280 {
 281 }
 282
 283 static int
 284 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
 285                 int wait_to_complete __rte_unused)
 286 {
 287         return 0;
 288 }
 289
 290 static int
 291 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 292 {
 293         unsigned long rx_packets_total = 0, rx_bytes_total = 0;
 294         unsigned long tx_packets_total = 0, tx_bytes_total = 0;
 295         struct rte_eth_dev_data *data = dev->data;
 296         unsigned int i, num_stats;
 297         struct pmd_queue *q;
 298
 299         num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 300                         data->nb_rx_queues);
 301         for (i = 0; i < num_stats; i++) {
 302                 q = data->rx_queues[i];
 303                 stats->q_ipackets[i] = q->rx.pkts;
 304                 stats->q_ibytes[i] = q->rx.bytes;
 305                 rx_packets_total += stats->q_ipackets[i];
 306                 rx_bytes_total += stats->q_ibytes[i];
 307         }
 308
 309         num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
 310                         data->nb_tx_queues);
 311         for (i = 0; i < num_stats; i++) {
 312                 q = data->tx_queues[i];
 313                 stats->q_opackets[i] = q->tx.pkts;
 314                 stats->q_obytes[i] = q->tx.bytes;
 315                 tx_packets_total += stats->q_opackets[i];
 316                 tx_bytes_total += stats->q_obytes[i];
 317         }
 318
 319         stats->ipackets = rx_packets_total;
 320         stats->ibytes = rx_bytes_total;
 321         stats->opackets = tx_packets_total;
 322         stats->obytes = tx_bytes_total;
 323
 324         return 0;
 325 }
 326
 327 static int
 328 eth_kni_stats_reset(struct rte_eth_dev *dev)
 329 {
 330         struct rte_eth_dev_data *data = dev->data;
 331         struct pmd_queue *q;
 332         unsigned int i;
 333
 334         for (i = 0; i < data->nb_rx_queues; i++) {
 335                 q = data->rx_queues[i];
 336                 q->rx.pkts = 0;
 337                 q->rx.bytes = 0;
 338         }
 339         for (i = 0; i < data->nb_tx_queues; i++) {
 340                 q = data->tx_queues[i];
 341                 q->tx.pkts = 0;
 342                 q->tx.bytes = 0;
 343         }
 344
 345         return 0;
 346 }
 347
 348 static const struct eth_dev_ops eth_kni_ops = {
 349         .dev_start = eth_kni_dev_start,
 350         .dev_stop = eth_kni_dev_stop,
 351         .dev_close = eth_kni_close,
 352         .dev_configure = eth_kni_dev_configure,
 353         .dev_infos_get = eth_kni_dev_info,
 354         .rx_queue_setup = eth_kni_rx_queue_setup,
 355         .tx_queue_setup = eth_kni_tx_queue_setup,
 356         .rx_queue_release = eth_kni_queue_release,
 357         .tx_queue_release = eth_kni_queue_release,
 358         .link_update = eth_kni_link_update,
 359         .stats_get = eth_kni_stats_get,
 360         .stats_reset = eth_kni_stats_reset,
 361 };
 362
 363 static struct rte_eth_dev *
 364 eth_kni_create(struct rte_vdev_device *vdev,
 365                 struct eth_kni_args *args,
 366                 unsigned int numa_node)
 367 {
 368         struct pmd_internals *internals;
 369         struct rte_eth_dev_data *data;
 370         struct rte_eth_dev *eth_dev;
 371
 372         PMD_LOG(INFO, "Creating kni ethdev on numa socket %u",
 373                         numa_node);
 374
 375         /* reserve an ethdev entry */
 376         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
 377         if (!eth_dev)
 378                 return NULL;
 379
 380         internals = eth_dev->data->dev_private;
 381         internals->port_id = eth_dev->data->port_id;
 382         data = eth_dev->data;
 383         data->nb_rx_queues = 1;
 384         data->nb_tx_queues = 1;
 385         data->dev_link = pmd_link;
 386         data->mac_addrs = &internals->eth_addr;
 387         data->promiscuous = 1;
 388         data->all_multicast = 1;
 389
 390         rte_eth_random_addr(internals->eth_addr.addr_bytes);
 391
 392         eth_dev->dev_ops = &eth_kni_ops;
 393
 394         internals->no_request_thread = args->no_request_thread;
 395
 396         return eth_dev;
 397 }
 398
 399 static int
 400 kni_init(void)
 401 {
 402         if (is_kni_initialized == 0)
 403                 rte_kni_init(MAX_KNI_PORTS);
 404
 405         is_kni_initialized++;
 406
 407         return 0;
 408 }
 409
 410 static int
 411 eth_kni_kvargs_process(struct eth_kni_args *args, const char *params)
 412 {
 413         struct rte_kvargs *kvlist;
 414
 415         kvlist = rte_kvargs_parse(params, valid_arguments);
 416         if (kvlist == NULL)
 417                 return -1;
 418
 419         memset(args, 0, sizeof(struct eth_kni_args));
 420
 421         if (rte_kvargs_count(kvlist, ETH_KNI_NO_REQUEST_THREAD_ARG) == 1)
 422                 args->no_request_thread = 1;
 423
 424         rte_kvargs_free(kvlist);
 425
 426         return 0;
 427 }
 428
 429 static int
 430 eth_kni_probe(struct rte_vdev_device *vdev)
 431 {
 432         struct rte_eth_dev *eth_dev;
 433         struct eth_kni_args args;
 434         const char *name;
 435         const char *params;
 436         int ret;
 437
 438         name = rte_vdev_device_name(vdev);
 439         params = rte_vdev_device_args(vdev);
 440         PMD_LOG(INFO, "Initializing eth_kni for %s", name);
 441
 442         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 443                 eth_dev = rte_eth_dev_attach_secondary(name);
 444                 if (!eth_dev) {
 445                         PMD_LOG(ERR, "Failed to probe %s", name);
 446                         return -1;
 447                 }
 448                 /* TODO: request info from primary to set up Rx and Tx */
 449                 eth_dev->dev_ops = &eth_kni_ops;
 450                 eth_dev->device = &vdev->device;
 451                 rte_eth_dev_probing_finish(eth_dev);
 452                 return 0;
 453         }
 454
 455         ret = eth_kni_kvargs_process(&args, params);
 456         if (ret < 0)
 457                 return ret;
 458
 459         ret = kni_init();
 460         if (ret < 0)
 461                 return ret;
 462
 463         eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
 464         if (eth_dev == NULL)
 465                 goto kni_uninit;
 466
 467         eth_dev->rx_pkt_burst = eth_kni_rx;
 468         eth_dev->tx_pkt_burst = eth_kni_tx;
 469
 470         rte_eth_dev_probing_finish(eth_dev);
 471         return 0;
 472
 473 kni_uninit:
 474         is_kni_initialized--;
 475         if (is_kni_initialized == 0)
 476                 rte_kni_close();
 477         return -1;
 478 }
 479
 480 static int
 481 eth_kni_remove(struct rte_vdev_device *vdev)
 482 {
 483         struct rte_eth_dev *eth_dev;
 484         const char *name;
 485
 486         name = rte_vdev_device_name(vdev);
 487         PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
 488
 489         /* find the ethdev entry */
 490         eth_dev = rte_eth_dev_allocated(name);
 491         if (eth_dev != NULL) {
 492                 if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 493                         eth_kni_dev_stop(eth_dev);
 494                         return rte_eth_dev_release_port(eth_dev);
 495                 }
 496                 eth_kni_close(eth_dev);
 497                 rte_eth_dev_release_port(eth_dev);
 498         }
 499
 500         is_kni_initialized--;
 501         if (is_kni_initialized == 0)
 502                 rte_kni_close();
 503
 504         return 0;
 505 }
 506
 507 static struct rte_vdev_driver eth_kni_drv = {
 508         .probe = eth_kni_probe,
 509         .remove = eth_kni_remove,
 510 };
 511
 512 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
 513 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");