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