1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <rte_mbuf.h> 6 #include <rte_ethdev.h> 7 #include <rte_ethdev_driver.h> 8 #include <rte_pci.h> 9 #include <rte_bus_pci.h> 10 #include <rte_malloc.h> 11 #include <rte_memcpy.h> 12 #include <rte_memory.h> 13 #include <rte_ring.h> 14 15 #include "virtual_pmd.h" 16 17 #define MAX_PKT_BURST 512 18 19 static const char *virtual_ethdev_driver_name = "Virtual PMD"; 20 21 struct virtual_ethdev_private { 22 struct eth_dev_ops dev_ops; 23 struct rte_eth_stats eth_stats; 24 25 struct rte_ring *rx_queue; 26 struct rte_ring *tx_queue; 27 28 int tx_burst_fail_count; 29 }; 30 31 struct virtual_ethdev_queue { 32 int port_id; 33 int queue_id; 34 }; 35 36 static int 37 virtual_ethdev_start_success(struct rte_eth_dev *eth_dev __rte_unused) 38 { 39 eth_dev->data->dev_started = 1; 40 41 return 0; 42 } 43 44 static int 45 virtual_ethdev_start_fail(struct rte_eth_dev *eth_dev __rte_unused) 46 { 47 eth_dev->data->dev_started = 0; 48 49 return -1; 50 } 51 static void virtual_ethdev_stop(struct rte_eth_dev *eth_dev __rte_unused) 52 { 53 void *pkt = NULL; 54 struct virtual_ethdev_private *prv = eth_dev->data->dev_private; 55 56 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN; 57 eth_dev->data->dev_started = 0; 58 while (rte_ring_dequeue(prv->rx_queue, &pkt) != -ENOENT) 59 rte_pktmbuf_free(pkt); 60 61 while (rte_ring_dequeue(prv->tx_queue, &pkt) != -ENOENT) 62 rte_pktmbuf_free(pkt); 63 } 64 65 static void 66 virtual_ethdev_close(struct rte_eth_dev *dev __rte_unused) 67 {} 68 69 static int 70 virtual_ethdev_configure_success(struct rte_eth_dev *dev __rte_unused) 71 { 72 return 0; 73 } 74 75 static int 76 virtual_ethdev_configure_fail(struct rte_eth_dev *dev __rte_unused) 77 { 78 return -1; 79 } 80 81 static int 82 virtual_ethdev_info_get(struct rte_eth_dev *dev __rte_unused, 83 struct rte_eth_dev_info *dev_info) 84 { 85 dev_info->driver_name = virtual_ethdev_driver_name; 86 dev_info->max_mac_addrs = 1; 87 88 dev_info->max_rx_pktlen = (uint32_t)2048; 89 90 dev_info->max_rx_queues = (uint16_t)128; 91 dev_info->max_tx_queues = (uint16_t)512; 92 93 dev_info->min_rx_bufsize = 0; 94 95 return 0; 96 } 97 98 static int 99 virtual_ethdev_rx_queue_setup_success(struct rte_eth_dev *dev, 100 uint16_t rx_queue_id, uint16_t nb_rx_desc __rte_unused, 101 unsigned int socket_id, 102 const struct rte_eth_rxconf *rx_conf __rte_unused, 103 struct rte_mempool *mb_pool __rte_unused) 104 { 105 struct virtual_ethdev_queue *rx_q; 106 107 rx_q = (struct virtual_ethdev_queue *)rte_zmalloc_socket(NULL, 108 sizeof(struct virtual_ethdev_queue), 0, socket_id); 109 110 if (rx_q == NULL) 111 return -1; 112 113 rx_q->port_id = dev->data->port_id; 114 rx_q->queue_id = rx_queue_id; 115 116 dev->data->rx_queues[rx_queue_id] = rx_q; 117 118 return 0; 119 } 120 121 static int 122 virtual_ethdev_rx_queue_setup_fail(struct rte_eth_dev *dev __rte_unused, 123 uint16_t rx_queue_id __rte_unused, uint16_t nb_rx_desc __rte_unused, 124 unsigned int socket_id __rte_unused, 125 const struct rte_eth_rxconf *rx_conf __rte_unused, 126 struct rte_mempool *mb_pool __rte_unused) 127 { 128 return -1; 129 } 130 131 static int 132 virtual_ethdev_tx_queue_setup_success(struct rte_eth_dev *dev, 133 uint16_t tx_queue_id, uint16_t nb_tx_desc __rte_unused, 134 unsigned int socket_id, 135 const struct rte_eth_txconf *tx_conf __rte_unused) 136 { 137 struct virtual_ethdev_queue *tx_q; 138 139 tx_q = (struct virtual_ethdev_queue *)rte_zmalloc_socket(NULL, 140 sizeof(struct virtual_ethdev_queue), 0, socket_id); 141 142 if (tx_q == NULL) 143 return -1; 144 145 tx_q->port_id = dev->data->port_id; 146 tx_q->queue_id = tx_queue_id; 147 148 dev->data->tx_queues[tx_queue_id] = tx_q; 149 150 return 0; 151 } 152 153 static int 154 virtual_ethdev_tx_queue_setup_fail(struct rte_eth_dev *dev __rte_unused, 155 uint16_t tx_queue_id __rte_unused, uint16_t nb_tx_desc __rte_unused, 156 unsigned int socket_id __rte_unused, 157 const struct rte_eth_txconf *tx_conf __rte_unused) 158 { 159 return -1; 160 } 161 162 static void 163 virtual_ethdev_rx_queue_release(void *q __rte_unused) 164 { 165 } 166 167 static void 168 virtual_ethdev_tx_queue_release(void *q __rte_unused) 169 { 170 } 171 172 static int 173 virtual_ethdev_link_update_success(struct rte_eth_dev *bonded_eth_dev, 174 int wait_to_complete __rte_unused) 175 { 176 if (!bonded_eth_dev->data->dev_started) 177 bonded_eth_dev->data->dev_link.link_status = ETH_LINK_DOWN; 178 179 return 0; 180 } 181 182 static int 183 virtual_ethdev_link_update_fail(struct rte_eth_dev *bonded_eth_dev __rte_unused, 184 int wait_to_complete __rte_unused) 185 { 186 return -1; 187 } 188 189 static int 190 virtual_ethdev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 191 { 192 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 193 194 if (stats) 195 rte_memcpy(stats, &dev_private->eth_stats, sizeof(*stats)); 196 197 return 0; 198 } 199 200 static void 201 virtual_ethdev_stats_reset(struct rte_eth_dev *dev) 202 { 203 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 204 void *pkt = NULL; 205 206 while (rte_ring_dequeue(dev_private->tx_queue, &pkt) == -ENOBUFS) 207 rte_pktmbuf_free(pkt); 208 209 /* Reset internal statistics */ 210 memset(&dev_private->eth_stats, 0, sizeof(dev_private->eth_stats)); 211 } 212 213 static int 214 virtual_ethdev_promiscuous_mode_enable(struct rte_eth_dev *dev __rte_unused) 215 { 216 return 0; 217 } 218 219 static int 220 virtual_ethdev_promiscuous_mode_disable(struct rte_eth_dev *dev __rte_unused) 221 { 222 return 0; 223 } 224 225 static int 226 virtual_ethdev_mac_address_set(__rte_unused struct rte_eth_dev *dev, 227 __rte_unused struct rte_ether_addr *addr) 228 { 229 return 0; 230 } 231 232 static const struct eth_dev_ops virtual_ethdev_default_dev_ops = { 233 .dev_configure = virtual_ethdev_configure_success, 234 .dev_start = virtual_ethdev_start_success, 235 .dev_stop = virtual_ethdev_stop, 236 .dev_close = virtual_ethdev_close, 237 .dev_infos_get = virtual_ethdev_info_get, 238 .rx_queue_setup = virtual_ethdev_rx_queue_setup_success, 239 .tx_queue_setup = virtual_ethdev_tx_queue_setup_success, 240 .rx_queue_release = virtual_ethdev_rx_queue_release, 241 .tx_queue_release = virtual_ethdev_tx_queue_release, 242 .link_update = virtual_ethdev_link_update_success, 243 .mac_addr_set = virtual_ethdev_mac_address_set, 244 .stats_get = virtual_ethdev_stats_get, 245 .stats_reset = virtual_ethdev_stats_reset, 246 .promiscuous_enable = virtual_ethdev_promiscuous_mode_enable, 247 .promiscuous_disable = virtual_ethdev_promiscuous_mode_disable 248 }; 249 250 void 251 virtual_ethdev_start_fn_set_success(uint16_t port_id, uint8_t success) 252 { 253 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 254 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 255 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 256 257 if (success) 258 dev_ops->dev_start = virtual_ethdev_start_success; 259 else 260 dev_ops->dev_start = virtual_ethdev_start_fail; 261 262 } 263 264 void 265 virtual_ethdev_configure_fn_set_success(uint16_t port_id, uint8_t success) 266 { 267 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 268 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 269 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 270 271 if (success) 272 dev_ops->dev_configure = virtual_ethdev_configure_success; 273 else 274 dev_ops->dev_configure = virtual_ethdev_configure_fail; 275 } 276 277 void 278 virtual_ethdev_rx_queue_setup_fn_set_success(uint16_t port_id, uint8_t success) 279 { 280 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 281 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 282 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 283 284 if (success) 285 dev_ops->rx_queue_setup = virtual_ethdev_rx_queue_setup_success; 286 else 287 dev_ops->rx_queue_setup = virtual_ethdev_rx_queue_setup_fail; 288 } 289 290 void 291 virtual_ethdev_tx_queue_setup_fn_set_success(uint16_t port_id, uint8_t success) 292 { 293 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 294 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 295 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 296 297 if (success) 298 dev_ops->tx_queue_setup = virtual_ethdev_tx_queue_setup_success; 299 else 300 dev_ops->tx_queue_setup = virtual_ethdev_tx_queue_setup_fail; 301 } 302 303 void 304 virtual_ethdev_link_update_fn_set_success(uint16_t port_id, uint8_t success) 305 { 306 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 307 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 308 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 309 310 if (success) 311 dev_ops->link_update = virtual_ethdev_link_update_success; 312 else 313 dev_ops->link_update = virtual_ethdev_link_update_fail; 314 } 315 316 317 static uint16_t 318 virtual_ethdev_rx_burst_success(void *queue __rte_unused, 319 struct rte_mbuf **bufs, 320 uint16_t nb_pkts) 321 { 322 struct rte_eth_dev *vrtl_eth_dev; 323 struct virtual_ethdev_queue *pq_map; 324 struct virtual_ethdev_private *dev_private; 325 326 int rx_count, i; 327 328 pq_map = (struct virtual_ethdev_queue *)queue; 329 vrtl_eth_dev = &rte_eth_devices[pq_map->port_id]; 330 dev_private = vrtl_eth_dev->data->dev_private; 331 332 rx_count = rte_ring_dequeue_burst(dev_private->rx_queue, (void **) bufs, 333 nb_pkts, NULL); 334 335 /* increments ipackets count */ 336 dev_private->eth_stats.ipackets += rx_count; 337 338 /* increments ibytes count */ 339 for (i = 0; i < rx_count; i++) 340 dev_private->eth_stats.ibytes += rte_pktmbuf_pkt_len(bufs[i]); 341 342 return rx_count; 343 } 344 345 static uint16_t 346 virtual_ethdev_rx_burst_fail(void *queue __rte_unused, 347 struct rte_mbuf **bufs __rte_unused, 348 uint16_t nb_pkts __rte_unused) 349 { 350 return 0; 351 } 352 353 static uint16_t 354 virtual_ethdev_tx_burst_success(void *queue, struct rte_mbuf **bufs, 355 uint16_t nb_pkts) 356 { 357 struct virtual_ethdev_queue *tx_q = queue; 358 359 struct rte_eth_dev *vrtl_eth_dev; 360 struct virtual_ethdev_private *dev_private; 361 362 int i; 363 364 vrtl_eth_dev = &rte_eth_devices[tx_q->port_id]; 365 dev_private = vrtl_eth_dev->data->dev_private; 366 367 if (!vrtl_eth_dev->data->dev_link.link_status) 368 nb_pkts = 0; 369 else 370 nb_pkts = rte_ring_enqueue_burst(dev_private->tx_queue, (void **)bufs, 371 nb_pkts, NULL); 372 373 /* increment opacket count */ 374 dev_private->eth_stats.opackets += nb_pkts; 375 376 /* increment obytes count */ 377 for (i = 0; i < nb_pkts; i++) 378 dev_private->eth_stats.obytes += rte_pktmbuf_pkt_len(bufs[i]); 379 380 return nb_pkts; 381 } 382 383 static uint16_t 384 virtual_ethdev_tx_burst_fail(void *queue, struct rte_mbuf **bufs, 385 uint16_t nb_pkts) 386 { 387 struct rte_eth_dev *vrtl_eth_dev = NULL; 388 struct virtual_ethdev_queue *tx_q = NULL; 389 struct virtual_ethdev_private *dev_private = NULL; 390 391 int i; 392 393 tx_q = queue; 394 vrtl_eth_dev = &rte_eth_devices[tx_q->port_id]; 395 dev_private = vrtl_eth_dev->data->dev_private; 396 397 if (dev_private->tx_burst_fail_count < nb_pkts) { 398 int successfully_txd = nb_pkts - dev_private->tx_burst_fail_count; 399 400 /* increment opacket count */ 401 dev_private->eth_stats.opackets += successfully_txd; 402 403 /* free packets in burst */ 404 for (i = 0; i < successfully_txd; i++) { 405 /* free packets in burst */ 406 if (bufs[i] != NULL) 407 rte_pktmbuf_free(bufs[i]); 408 409 bufs[i] = NULL; 410 } 411 412 return successfully_txd; 413 } 414 415 return 0; 416 } 417 418 419 void 420 virtual_ethdev_rx_burst_fn_set_success(uint16_t port_id, uint8_t success) 421 { 422 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 423 424 if (success) 425 vrtl_eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_success; 426 else 427 vrtl_eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_fail; 428 } 429 430 431 void 432 virtual_ethdev_tx_burst_fn_set_success(uint16_t port_id, uint8_t success) 433 { 434 struct virtual_ethdev_private *dev_private = NULL; 435 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 436 437 dev_private = vrtl_eth_dev->data->dev_private; 438 439 if (success) 440 vrtl_eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_success; 441 else 442 vrtl_eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_fail; 443 444 dev_private->tx_burst_fail_count = 0; 445 } 446 447 void 448 virtual_ethdev_tx_burst_fn_set_tx_pkt_fail_count(uint16_t port_id, 449 uint8_t packet_fail_count) 450 { 451 struct virtual_ethdev_private *dev_private = NULL; 452 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 453 454 455 dev_private = vrtl_eth_dev->data->dev_private; 456 dev_private->tx_burst_fail_count = packet_fail_count; 457 } 458 459 void 460 virtual_ethdev_set_link_status(uint16_t port_id, uint8_t link_status) 461 { 462 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 463 464 vrtl_eth_dev->data->dev_link.link_status = link_status; 465 } 466 467 void 468 virtual_ethdev_simulate_link_status_interrupt(uint16_t port_id, 469 uint8_t link_status) 470 { 471 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 472 473 vrtl_eth_dev->data->dev_link.link_status = link_status; 474 475 _rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC, 476 NULL); 477 } 478 479 int 480 virtual_ethdev_add_mbufs_to_rx_queue(uint16_t port_id, 481 struct rte_mbuf **pkt_burst, int burst_length) 482 { 483 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 484 struct virtual_ethdev_private *dev_private = 485 vrtl_eth_dev->data->dev_private; 486 487 return rte_ring_enqueue_burst(dev_private->rx_queue, (void **)pkt_burst, 488 burst_length, NULL); 489 } 490 491 int 492 virtual_ethdev_get_mbufs_from_tx_queue(uint16_t port_id, 493 struct rte_mbuf **pkt_burst, int burst_length) 494 { 495 struct virtual_ethdev_private *dev_private; 496 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 497 498 dev_private = vrtl_eth_dev->data->dev_private; 499 return rte_ring_dequeue_burst(dev_private->tx_queue, (void **)pkt_burst, 500 burst_length, NULL); 501 } 502 503 504 int 505 virtual_ethdev_create(const char *name, struct rte_ether_addr *mac_addr, 506 uint8_t socket_id, uint8_t isr_support) 507 { 508 struct rte_pci_device *pci_dev = NULL; 509 struct rte_eth_dev *eth_dev = NULL; 510 struct rte_pci_driver *pci_drv = NULL; 511 struct rte_pci_id *id_table = NULL; 512 struct virtual_ethdev_private *dev_private = NULL; 513 char name_buf[RTE_RING_NAMESIZE]; 514 515 516 /* now do all data allocation - for eth_dev structure, dummy pci driver 517 * and internal (dev_private) data 518 */ 519 520 pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, socket_id); 521 if (pci_dev == NULL) 522 goto err; 523 524 pci_drv = rte_zmalloc_socket(name, sizeof(*pci_drv), 0, socket_id); 525 if (pci_drv == NULL) 526 goto err; 527 528 id_table = rte_zmalloc_socket(name, sizeof(*id_table), 0, socket_id); 529 if (id_table == NULL) 530 goto err; 531 id_table->device_id = 0xBEEF; 532 533 dev_private = rte_zmalloc_socket(name, sizeof(*dev_private), 0, socket_id); 534 if (dev_private == NULL) 535 goto err; 536 537 snprintf(name_buf, sizeof(name_buf), "%s_rxQ", name); 538 dev_private->rx_queue = rte_ring_create(name_buf, MAX_PKT_BURST, socket_id, 539 0); 540 if (dev_private->rx_queue == NULL) 541 goto err; 542 543 snprintf(name_buf, sizeof(name_buf), "%s_txQ", name); 544 dev_private->tx_queue = rte_ring_create(name_buf, MAX_PKT_BURST, socket_id, 545 0); 546 if (dev_private->tx_queue == NULL) 547 goto err; 548 549 /* reserve an ethdev entry */ 550 eth_dev = rte_eth_dev_allocate(name); 551 if (eth_dev == NULL) 552 goto err; 553 554 pci_dev->device.numa_node = socket_id; 555 pci_dev->device.name = eth_dev->data->name; 556 pci_drv->driver.name = virtual_ethdev_driver_name; 557 pci_drv->id_table = id_table; 558 559 if (isr_support) 560 pci_drv->drv_flags |= RTE_PCI_DRV_INTR_LSC; 561 else 562 pci_drv->drv_flags &= ~RTE_PCI_DRV_INTR_LSC; 563 564 565 eth_dev->device = &pci_dev->device; 566 eth_dev->device->driver = &pci_drv->driver; 567 568 eth_dev->data->nb_rx_queues = (uint16_t)1; 569 eth_dev->data->nb_tx_queues = (uint16_t)1; 570 571 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN; 572 eth_dev->data->dev_link.link_speed = ETH_SPEED_NUM_10G; 573 eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX; 574 575 eth_dev->data->mac_addrs = rte_zmalloc(name, RTE_ETHER_ADDR_LEN, 0); 576 if (eth_dev->data->mac_addrs == NULL) 577 goto err; 578 579 memcpy(eth_dev->data->mac_addrs, mac_addr, 580 sizeof(*eth_dev->data->mac_addrs)); 581 582 eth_dev->data->dev_started = 0; 583 eth_dev->data->promiscuous = 0; 584 eth_dev->data->scattered_rx = 0; 585 eth_dev->data->all_multicast = 0; 586 587 eth_dev->data->dev_private = dev_private; 588 589 /* Copy default device operation functions */ 590 dev_private->dev_ops = virtual_ethdev_default_dev_ops; 591 eth_dev->dev_ops = &dev_private->dev_ops; 592 593 pci_dev->device.driver = &pci_drv->driver; 594 eth_dev->device = &pci_dev->device; 595 596 eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_success; 597 eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_success; 598 599 rte_eth_dev_probing_finish(eth_dev); 600 601 return eth_dev->data->port_id; 602 603 err: 604 rte_free(pci_dev); 605 rte_free(pci_drv); 606 rte_free(id_table); 607 rte_free(dev_private); 608 609 return -1; 610 } 611