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 void 214 virtual_ethdev_promiscuous_mode_enable(struct rte_eth_dev *dev __rte_unused) 215 {} 216 217 static void 218 virtual_ethdev_promiscuous_mode_disable(struct rte_eth_dev *dev __rte_unused) 219 {} 220 221 static int 222 virtual_ethdev_mac_address_set(__rte_unused struct rte_eth_dev *dev, 223 __rte_unused struct rte_ether_addr *addr) 224 { 225 return 0; 226 } 227 228 static const struct eth_dev_ops virtual_ethdev_default_dev_ops = { 229 .dev_configure = virtual_ethdev_configure_success, 230 .dev_start = virtual_ethdev_start_success, 231 .dev_stop = virtual_ethdev_stop, 232 .dev_close = virtual_ethdev_close, 233 .dev_infos_get = virtual_ethdev_info_get, 234 .rx_queue_setup = virtual_ethdev_rx_queue_setup_success, 235 .tx_queue_setup = virtual_ethdev_tx_queue_setup_success, 236 .rx_queue_release = virtual_ethdev_rx_queue_release, 237 .tx_queue_release = virtual_ethdev_tx_queue_release, 238 .link_update = virtual_ethdev_link_update_success, 239 .mac_addr_set = virtual_ethdev_mac_address_set, 240 .stats_get = virtual_ethdev_stats_get, 241 .stats_reset = virtual_ethdev_stats_reset, 242 .promiscuous_enable = virtual_ethdev_promiscuous_mode_enable, 243 .promiscuous_disable = virtual_ethdev_promiscuous_mode_disable 244 }; 245 246 void 247 virtual_ethdev_start_fn_set_success(uint16_t port_id, uint8_t success) 248 { 249 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 250 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 251 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 252 253 if (success) 254 dev_ops->dev_start = virtual_ethdev_start_success; 255 else 256 dev_ops->dev_start = virtual_ethdev_start_fail; 257 258 } 259 260 void 261 virtual_ethdev_configure_fn_set_success(uint16_t port_id, uint8_t success) 262 { 263 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 264 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 265 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 266 267 if (success) 268 dev_ops->dev_configure = virtual_ethdev_configure_success; 269 else 270 dev_ops->dev_configure = virtual_ethdev_configure_fail; 271 } 272 273 void 274 virtual_ethdev_rx_queue_setup_fn_set_success(uint16_t port_id, uint8_t success) 275 { 276 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 277 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 278 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 279 280 if (success) 281 dev_ops->rx_queue_setup = virtual_ethdev_rx_queue_setup_success; 282 else 283 dev_ops->rx_queue_setup = virtual_ethdev_rx_queue_setup_fail; 284 } 285 286 void 287 virtual_ethdev_tx_queue_setup_fn_set_success(uint16_t port_id, uint8_t success) 288 { 289 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 290 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 291 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 292 293 if (success) 294 dev_ops->tx_queue_setup = virtual_ethdev_tx_queue_setup_success; 295 else 296 dev_ops->tx_queue_setup = virtual_ethdev_tx_queue_setup_fail; 297 } 298 299 void 300 virtual_ethdev_link_update_fn_set_success(uint16_t port_id, uint8_t success) 301 { 302 struct rte_eth_dev *dev = &rte_eth_devices[port_id]; 303 struct virtual_ethdev_private *dev_private = dev->data->dev_private; 304 struct eth_dev_ops *dev_ops = &dev_private->dev_ops; 305 306 if (success) 307 dev_ops->link_update = virtual_ethdev_link_update_success; 308 else 309 dev_ops->link_update = virtual_ethdev_link_update_fail; 310 } 311 312 313 static uint16_t 314 virtual_ethdev_rx_burst_success(void *queue __rte_unused, 315 struct rte_mbuf **bufs, 316 uint16_t nb_pkts) 317 { 318 struct rte_eth_dev *vrtl_eth_dev; 319 struct virtual_ethdev_queue *pq_map; 320 struct virtual_ethdev_private *dev_private; 321 322 int rx_count, i; 323 324 pq_map = (struct virtual_ethdev_queue *)queue; 325 vrtl_eth_dev = &rte_eth_devices[pq_map->port_id]; 326 dev_private = vrtl_eth_dev->data->dev_private; 327 328 rx_count = rte_ring_dequeue_burst(dev_private->rx_queue, (void **) bufs, 329 nb_pkts, NULL); 330 331 /* increments ipackets count */ 332 dev_private->eth_stats.ipackets += rx_count; 333 334 /* increments ibytes count */ 335 for (i = 0; i < rx_count; i++) 336 dev_private->eth_stats.ibytes += rte_pktmbuf_pkt_len(bufs[i]); 337 338 return rx_count; 339 } 340 341 static uint16_t 342 virtual_ethdev_rx_burst_fail(void *queue __rte_unused, 343 struct rte_mbuf **bufs __rte_unused, 344 uint16_t nb_pkts __rte_unused) 345 { 346 return 0; 347 } 348 349 static uint16_t 350 virtual_ethdev_tx_burst_success(void *queue, struct rte_mbuf **bufs, 351 uint16_t nb_pkts) 352 { 353 struct virtual_ethdev_queue *tx_q = queue; 354 355 struct rte_eth_dev *vrtl_eth_dev; 356 struct virtual_ethdev_private *dev_private; 357 358 int i; 359 360 vrtl_eth_dev = &rte_eth_devices[tx_q->port_id]; 361 dev_private = vrtl_eth_dev->data->dev_private; 362 363 if (!vrtl_eth_dev->data->dev_link.link_status) 364 nb_pkts = 0; 365 else 366 nb_pkts = rte_ring_enqueue_burst(dev_private->tx_queue, (void **)bufs, 367 nb_pkts, NULL); 368 369 /* increment opacket count */ 370 dev_private->eth_stats.opackets += nb_pkts; 371 372 /* increment obytes count */ 373 for (i = 0; i < nb_pkts; i++) 374 dev_private->eth_stats.obytes += rte_pktmbuf_pkt_len(bufs[i]); 375 376 return nb_pkts; 377 } 378 379 static uint16_t 380 virtual_ethdev_tx_burst_fail(void *queue, struct rte_mbuf **bufs, 381 uint16_t nb_pkts) 382 { 383 struct rte_eth_dev *vrtl_eth_dev = NULL; 384 struct virtual_ethdev_queue *tx_q = NULL; 385 struct virtual_ethdev_private *dev_private = NULL; 386 387 int i; 388 389 tx_q = queue; 390 vrtl_eth_dev = &rte_eth_devices[tx_q->port_id]; 391 dev_private = vrtl_eth_dev->data->dev_private; 392 393 if (dev_private->tx_burst_fail_count < nb_pkts) { 394 int successfully_txd = nb_pkts - dev_private->tx_burst_fail_count; 395 396 /* increment opacket count */ 397 dev_private->eth_stats.opackets += successfully_txd; 398 399 /* free packets in burst */ 400 for (i = 0; i < successfully_txd; i++) { 401 /* free packets in burst */ 402 if (bufs[i] != NULL) 403 rte_pktmbuf_free(bufs[i]); 404 405 bufs[i] = NULL; 406 } 407 408 return successfully_txd; 409 } 410 411 return 0; 412 } 413 414 415 void 416 virtual_ethdev_rx_burst_fn_set_success(uint16_t port_id, uint8_t success) 417 { 418 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 419 420 if (success) 421 vrtl_eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_success; 422 else 423 vrtl_eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_fail; 424 } 425 426 427 void 428 virtual_ethdev_tx_burst_fn_set_success(uint16_t port_id, uint8_t success) 429 { 430 struct virtual_ethdev_private *dev_private = NULL; 431 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 432 433 dev_private = vrtl_eth_dev->data->dev_private; 434 435 if (success) 436 vrtl_eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_success; 437 else 438 vrtl_eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_fail; 439 440 dev_private->tx_burst_fail_count = 0; 441 } 442 443 void 444 virtual_ethdev_tx_burst_fn_set_tx_pkt_fail_count(uint16_t port_id, 445 uint8_t packet_fail_count) 446 { 447 struct virtual_ethdev_private *dev_private = NULL; 448 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 449 450 451 dev_private = vrtl_eth_dev->data->dev_private; 452 dev_private->tx_burst_fail_count = packet_fail_count; 453 } 454 455 void 456 virtual_ethdev_set_link_status(uint16_t port_id, uint8_t link_status) 457 { 458 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 459 460 vrtl_eth_dev->data->dev_link.link_status = link_status; 461 } 462 463 void 464 virtual_ethdev_simulate_link_status_interrupt(uint16_t port_id, 465 uint8_t link_status) 466 { 467 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 468 469 vrtl_eth_dev->data->dev_link.link_status = link_status; 470 471 _rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC, 472 NULL); 473 } 474 475 int 476 virtual_ethdev_add_mbufs_to_rx_queue(uint16_t port_id, 477 struct rte_mbuf **pkt_burst, int burst_length) 478 { 479 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 480 struct virtual_ethdev_private *dev_private = 481 vrtl_eth_dev->data->dev_private; 482 483 return rte_ring_enqueue_burst(dev_private->rx_queue, (void **)pkt_burst, 484 burst_length, NULL); 485 } 486 487 int 488 virtual_ethdev_get_mbufs_from_tx_queue(uint16_t port_id, 489 struct rte_mbuf **pkt_burst, int burst_length) 490 { 491 struct virtual_ethdev_private *dev_private; 492 struct rte_eth_dev *vrtl_eth_dev = &rte_eth_devices[port_id]; 493 494 dev_private = vrtl_eth_dev->data->dev_private; 495 return rte_ring_dequeue_burst(dev_private->tx_queue, (void **)pkt_burst, 496 burst_length, NULL); 497 } 498 499 500 int 501 virtual_ethdev_create(const char *name, struct rte_ether_addr *mac_addr, 502 uint8_t socket_id, uint8_t isr_support) 503 { 504 struct rte_pci_device *pci_dev = NULL; 505 struct rte_eth_dev *eth_dev = NULL; 506 struct rte_pci_driver *pci_drv = NULL; 507 struct rte_pci_id *id_table = NULL; 508 struct virtual_ethdev_private *dev_private = NULL; 509 char name_buf[RTE_RING_NAMESIZE]; 510 511 512 /* now do all data allocation - for eth_dev structure, dummy pci driver 513 * and internal (dev_private) data 514 */ 515 516 pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, socket_id); 517 if (pci_dev == NULL) 518 goto err; 519 520 pci_drv = rte_zmalloc_socket(name, sizeof(*pci_drv), 0, socket_id); 521 if (pci_drv == NULL) 522 goto err; 523 524 id_table = rte_zmalloc_socket(name, sizeof(*id_table), 0, socket_id); 525 if (id_table == NULL) 526 goto err; 527 id_table->device_id = 0xBEEF; 528 529 dev_private = rte_zmalloc_socket(name, sizeof(*dev_private), 0, socket_id); 530 if (dev_private == NULL) 531 goto err; 532 533 snprintf(name_buf, sizeof(name_buf), "%s_rxQ", name); 534 dev_private->rx_queue = rte_ring_create(name_buf, MAX_PKT_BURST, socket_id, 535 0); 536 if (dev_private->rx_queue == NULL) 537 goto err; 538 539 snprintf(name_buf, sizeof(name_buf), "%s_txQ", name); 540 dev_private->tx_queue = rte_ring_create(name_buf, MAX_PKT_BURST, socket_id, 541 0); 542 if (dev_private->tx_queue == NULL) 543 goto err; 544 545 /* reserve an ethdev entry */ 546 eth_dev = rte_eth_dev_allocate(name); 547 if (eth_dev == NULL) 548 goto err; 549 550 pci_dev->device.numa_node = socket_id; 551 pci_dev->device.name = eth_dev->data->name; 552 pci_drv->driver.name = virtual_ethdev_driver_name; 553 pci_drv->id_table = id_table; 554 555 if (isr_support) 556 pci_drv->drv_flags |= RTE_PCI_DRV_INTR_LSC; 557 else 558 pci_drv->drv_flags &= ~RTE_PCI_DRV_INTR_LSC; 559 560 561 eth_dev->device = &pci_dev->device; 562 eth_dev->device->driver = &pci_drv->driver; 563 564 eth_dev->data->nb_rx_queues = (uint16_t)1; 565 eth_dev->data->nb_tx_queues = (uint16_t)1; 566 567 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN; 568 eth_dev->data->dev_link.link_speed = ETH_SPEED_NUM_10G; 569 eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX; 570 571 eth_dev->data->mac_addrs = rte_zmalloc(name, RTE_ETHER_ADDR_LEN, 0); 572 if (eth_dev->data->mac_addrs == NULL) 573 goto err; 574 575 memcpy(eth_dev->data->mac_addrs, mac_addr, 576 sizeof(*eth_dev->data->mac_addrs)); 577 578 eth_dev->data->dev_started = 0; 579 eth_dev->data->promiscuous = 0; 580 eth_dev->data->scattered_rx = 0; 581 eth_dev->data->all_multicast = 0; 582 583 eth_dev->data->dev_private = dev_private; 584 585 /* Copy default device operation functions */ 586 dev_private->dev_ops = virtual_ethdev_default_dev_ops; 587 eth_dev->dev_ops = &dev_private->dev_ops; 588 589 pci_dev->device.driver = &pci_drv->driver; 590 eth_dev->device = &pci_dev->device; 591 592 eth_dev->rx_pkt_burst = virtual_ethdev_rx_burst_success; 593 eth_dev->tx_pkt_burst = virtual_ethdev_tx_burst_success; 594 595 rte_eth_dev_probing_finish(eth_dev); 596 597 return eth_dev->data->port_id; 598 599 err: 600 rte_free(pci_dev); 601 rte_free(pci_drv); 602 rte_free(id_table); 603 rte_free(dev_private); 604 605 return -1; 606 } 607