1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <sys/types.h> 7 #include <unistd.h> 8 #include <fcntl.h> 9 #include <sys/socket.h> 10 11 #include <rte_malloc.h> 12 #include <rte_kvargs.h> 13 #include <rte_ethdev_vdev.h> 14 #include <rte_bus_vdev.h> 15 #include <rte_alarm.h> 16 17 #include "virtio_ethdev.h" 18 #include "virtio_logs.h" 19 #include "virtio_pci.h" 20 #include "virtqueue.h" 21 #include "virtio_rxtx.h" 22 #include "virtio_user/virtio_user_dev.h" 23 24 #define virtio_user_get_dev(hw) \ 25 ((struct virtio_user_dev *)(hw)->virtio_user_dev) 26 27 static int 28 virtio_user_server_reconnect(struct virtio_user_dev *dev) 29 { 30 int ret; 31 int connectfd; 32 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id]; 33 34 connectfd = accept(dev->listenfd, NULL, NULL); 35 if (connectfd < 0) 36 return -1; 37 38 dev->vhostfd = connectfd; 39 if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES, 40 &dev->device_features) < 0) { 41 PMD_INIT_LOG(ERR, "get_features failed: %s", 42 strerror(errno)); 43 return -1; 44 } 45 46 dev->device_features |= dev->frontend_features; 47 48 /* umask vhost-user unsupported features */ 49 dev->device_features &= ~(dev->unsupported_features); 50 51 dev->features &= dev->device_features; 52 53 ret = virtio_user_start_device(dev); 54 if (ret < 0) 55 return -1; 56 57 if (dev->queue_pairs > 1) { 58 ret = virtio_user_handle_mq(dev, dev->queue_pairs); 59 if (ret != 0) { 60 PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!"); 61 return -1; 62 } 63 } 64 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { 65 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 66 PMD_DRV_LOG(ERR, "interrupt disable failed"); 67 return -1; 68 } 69 rte_intr_callback_unregister(eth_dev->intr_handle, 70 virtio_interrupt_handler, 71 eth_dev); 72 eth_dev->intr_handle->fd = connectfd; 73 rte_intr_callback_register(eth_dev->intr_handle, 74 virtio_interrupt_handler, eth_dev); 75 76 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 77 PMD_DRV_LOG(ERR, "interrupt enable failed"); 78 return -1; 79 } 80 } 81 PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!"); 82 return 0; 83 } 84 85 static void 86 virtio_user_delayed_handler(void *param) 87 { 88 struct virtio_hw *hw = (struct virtio_hw *)param; 89 struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id]; 90 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 91 92 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 93 PMD_DRV_LOG(ERR, "interrupt disable failed"); 94 return; 95 } 96 rte_intr_callback_unregister(eth_dev->intr_handle, 97 virtio_interrupt_handler, eth_dev); 98 if (dev->is_server) { 99 if (dev->vhostfd >= 0) { 100 close(dev->vhostfd); 101 dev->vhostfd = -1; 102 } 103 eth_dev->intr_handle->fd = dev->listenfd; 104 rte_intr_callback_register(eth_dev->intr_handle, 105 virtio_interrupt_handler, eth_dev); 106 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 107 PMD_DRV_LOG(ERR, "interrupt enable failed"); 108 return; 109 } 110 } 111 } 112 113 static void 114 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, 115 void *dst, int length) 116 { 117 int i; 118 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 119 120 if (offset == offsetof(struct virtio_net_config, mac) && 121 length == ETHER_ADDR_LEN) { 122 for (i = 0; i < ETHER_ADDR_LEN; ++i) 123 ((uint8_t *)dst)[i] = dev->mac_addr[i]; 124 return; 125 } 126 127 if (offset == offsetof(struct virtio_net_config, status)) { 128 char buf[128]; 129 130 if (dev->vhostfd >= 0) { 131 int r; 132 int flags; 133 134 flags = fcntl(dev->vhostfd, F_GETFL); 135 if (fcntl(dev->vhostfd, F_SETFL, 136 flags | O_NONBLOCK) == -1) { 137 PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag"); 138 return; 139 } 140 r = recv(dev->vhostfd, buf, 128, MSG_PEEK); 141 if (r == 0 || (r < 0 && errno != EAGAIN)) { 142 dev->status &= (~VIRTIO_NET_S_LINK_UP); 143 PMD_DRV_LOG(ERR, "virtio-user port %u is down", 144 hw->port_id); 145 146 /* This function could be called in the process 147 * of interrupt handling, callback cannot be 148 * unregistered here, set an alarm to do it. 149 */ 150 rte_eal_alarm_set(1, 151 virtio_user_delayed_handler, 152 (void *)hw); 153 } else { 154 dev->status |= VIRTIO_NET_S_LINK_UP; 155 } 156 if (fcntl(dev->vhostfd, F_SETFL, 157 flags & ~O_NONBLOCK) == -1) { 158 PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag"); 159 return; 160 } 161 } else if (dev->is_server) { 162 dev->status &= (~VIRTIO_NET_S_LINK_UP); 163 if (virtio_user_server_reconnect(dev) >= 0) 164 dev->status |= VIRTIO_NET_S_LINK_UP; 165 } 166 167 *(uint16_t *)dst = dev->status; 168 } 169 170 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) 171 *(uint16_t *)dst = dev->max_queue_pairs; 172 } 173 174 static void 175 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, 176 const void *src, int length) 177 { 178 int i; 179 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 180 181 if ((offset == offsetof(struct virtio_net_config, mac)) && 182 (length == ETHER_ADDR_LEN)) 183 for (i = 0; i < ETHER_ADDR_LEN; ++i) 184 dev->mac_addr[i] = ((const uint8_t *)src)[i]; 185 else 186 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", 187 offset, length); 188 } 189 190 static void 191 virtio_user_reset(struct virtio_hw *hw) 192 { 193 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 194 195 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 196 virtio_user_stop_device(dev); 197 } 198 199 static void 200 virtio_user_set_status(struct virtio_hw *hw, uint8_t status) 201 { 202 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 203 204 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 205 virtio_user_start_device(dev); 206 else if (status == VIRTIO_CONFIG_STATUS_RESET) 207 virtio_user_reset(hw); 208 dev->status = status; 209 } 210 211 static uint8_t 212 virtio_user_get_status(struct virtio_hw *hw) 213 { 214 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 215 216 return dev->status; 217 } 218 219 static uint64_t 220 virtio_user_get_features(struct virtio_hw *hw) 221 { 222 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 223 224 /* unmask feature bits defined in vhost user protocol */ 225 return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; 226 } 227 228 static void 229 virtio_user_set_features(struct virtio_hw *hw, uint64_t features) 230 { 231 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 232 233 dev->features = features & dev->device_features; 234 } 235 236 static uint8_t 237 virtio_user_get_isr(struct virtio_hw *hw __rte_unused) 238 { 239 /* rxq interrupts and config interrupt are separated in virtio-user, 240 * here we only report config change. 241 */ 242 return VIRTIO_PCI_ISR_CONFIG; 243 } 244 245 static uint16_t 246 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, 247 uint16_t vec __rte_unused) 248 { 249 return 0; 250 } 251 252 static uint16_t 253 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, 254 struct virtqueue *vq __rte_unused, 255 uint16_t vec) 256 { 257 /* pretend we have done that */ 258 return vec; 259 } 260 261 /* This function is to get the queue size, aka, number of descs, of a specified 262 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the 263 * max supported queues. 264 */ 265 static uint16_t 266 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused) 267 { 268 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 269 270 /* Currently, each queue has same queue size */ 271 return dev->queue_size; 272 } 273 274 static int 275 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 276 { 277 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 278 uint16_t queue_idx = vq->vq_queue_index; 279 uint64_t desc_addr, avail_addr, used_addr; 280 281 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 282 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 283 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 284 ring[vq->vq_nentries]), 285 VIRTIO_PCI_VRING_ALIGN); 286 287 dev->vrings[queue_idx].num = vq->vq_nentries; 288 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 289 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 290 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 291 292 return 0; 293 } 294 295 static void 296 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 297 { 298 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 299 * correspondingly stops the ioeventfds, and reset the status of 300 * the device. 301 * For modern devices, set queue desc, avail, used in PCI bar to 0, 302 * not see any more behavior in QEMU. 303 * 304 * Here we just care about what information to deliver to vhost-user 305 * or vhost-kernel. So we just close ioeventfd for now. 306 */ 307 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 308 309 close(dev->callfds[vq->vq_queue_index]); 310 close(dev->kickfds[vq->vq_queue_index]); 311 } 312 313 static void 314 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 315 { 316 uint64_t buf = 1; 317 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 318 319 if (hw->cvq && (hw->cvq->vq == vq)) { 320 virtio_user_handle_cq(dev, vq->vq_queue_index); 321 return; 322 } 323 324 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 325 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 326 strerror(errno)); 327 } 328 329 const struct virtio_pci_ops virtio_user_ops = { 330 .read_dev_cfg = virtio_user_read_dev_config, 331 .write_dev_cfg = virtio_user_write_dev_config, 332 .get_status = virtio_user_get_status, 333 .set_status = virtio_user_set_status, 334 .get_features = virtio_user_get_features, 335 .set_features = virtio_user_set_features, 336 .get_isr = virtio_user_get_isr, 337 .set_config_irq = virtio_user_set_config_irq, 338 .set_queue_irq = virtio_user_set_queue_irq, 339 .get_queue_num = virtio_user_get_queue_num, 340 .setup_queue = virtio_user_setup_queue, 341 .del_queue = virtio_user_del_queue, 342 .notify_queue = virtio_user_notify_queue, 343 }; 344 345 static const char *valid_args[] = { 346 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 347 VIRTIO_USER_ARG_QUEUES_NUM, 348 #define VIRTIO_USER_ARG_CQ_NUM "cq" 349 VIRTIO_USER_ARG_CQ_NUM, 350 #define VIRTIO_USER_ARG_MAC "mac" 351 VIRTIO_USER_ARG_MAC, 352 #define VIRTIO_USER_ARG_PATH "path" 353 VIRTIO_USER_ARG_PATH, 354 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 355 VIRTIO_USER_ARG_QUEUE_SIZE, 356 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 357 VIRTIO_USER_ARG_INTERFACE_NAME, 358 #define VIRTIO_USER_ARG_SERVER_MODE "server" 359 VIRTIO_USER_ARG_SERVER_MODE, 360 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 361 VIRTIO_USER_ARG_MRG_RXBUF, 362 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 363 VIRTIO_USER_ARG_IN_ORDER, 364 NULL 365 }; 366 367 #define VIRTIO_USER_DEF_CQ_EN 0 368 #define VIRTIO_USER_DEF_Q_NUM 1 369 #define VIRTIO_USER_DEF_Q_SZ 256 370 #define VIRTIO_USER_DEF_SERVER_MODE 0 371 372 static int 373 get_string_arg(const char *key __rte_unused, 374 const char *value, void *extra_args) 375 { 376 if (!value || !extra_args) 377 return -EINVAL; 378 379 *(char **)extra_args = strdup(value); 380 381 if (!*(char **)extra_args) 382 return -ENOMEM; 383 384 return 0; 385 } 386 387 static int 388 get_integer_arg(const char *key __rte_unused, 389 const char *value, void *extra_args) 390 { 391 if (!value || !extra_args) 392 return -EINVAL; 393 394 *(uint64_t *)extra_args = strtoull(value, NULL, 0); 395 396 return 0; 397 } 398 399 static struct rte_eth_dev * 400 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 401 { 402 struct rte_eth_dev *eth_dev; 403 struct rte_eth_dev_data *data; 404 struct virtio_hw *hw; 405 struct virtio_user_dev *dev; 406 407 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); 408 if (!eth_dev) { 409 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 410 return NULL; 411 } 412 413 data = eth_dev->data; 414 hw = eth_dev->data->dev_private; 415 416 dev = rte_zmalloc(NULL, sizeof(*dev), 0); 417 if (!dev) { 418 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); 419 rte_eth_dev_release_port(eth_dev); 420 return NULL; 421 } 422 423 hw->port_id = data->port_id; 424 dev->port_id = data->port_id; 425 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; 426 /* 427 * MSIX is required to enable LSC (see virtio_init_device). 428 * Here just pretend that we support msix. 429 */ 430 hw->use_msix = 1; 431 hw->modern = 0; 432 hw->use_simple_rx = 0; 433 hw->use_inorder_rx = 0; 434 hw->use_inorder_tx = 0; 435 hw->virtio_user_dev = dev; 436 return eth_dev; 437 } 438 439 static void 440 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 441 { 442 struct rte_eth_dev_data *data = eth_dev->data; 443 struct virtio_hw *hw = data->dev_private; 444 445 rte_free(hw->virtio_user_dev); 446 rte_eth_dev_release_port(eth_dev); 447 } 448 449 /* Dev initialization routine. Invoked once for each virtio vdev at 450 * EAL init time, see rte_bus_probe(). 451 * Returns 0 on success. 452 */ 453 static int 454 virtio_user_pmd_probe(struct rte_vdev_device *dev) 455 { 456 struct rte_kvargs *kvlist = NULL; 457 struct rte_eth_dev *eth_dev; 458 struct virtio_hw *hw; 459 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 460 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 461 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 462 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 463 uint64_t mrg_rxbuf = 1; 464 uint64_t in_order = 1; 465 char *path = NULL; 466 char *ifname = NULL; 467 char *mac_addr = NULL; 468 int ret = -1; 469 470 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 471 const char *name = rte_vdev_device_name(dev); 472 eth_dev = rte_eth_dev_attach_secondary(name); 473 if (!eth_dev) { 474 RTE_LOG(ERR, PMD, "Failed to probe %s\n", name); 475 return -1; 476 } 477 478 if (eth_virtio_dev_init(eth_dev) < 0) { 479 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 480 rte_eth_dev_release_port(eth_dev); 481 return -1; 482 } 483 484 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops; 485 eth_dev->device = &dev->device; 486 rte_eth_dev_probing_finish(eth_dev); 487 return 0; 488 } 489 490 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); 491 if (!kvlist) { 492 PMD_INIT_LOG(ERR, "error when parsing param"); 493 goto end; 494 } 495 496 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 497 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 498 &get_string_arg, &path) < 0) { 499 PMD_INIT_LOG(ERR, "error to parse %s", 500 VIRTIO_USER_ARG_PATH); 501 goto end; 502 } 503 } else { 504 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 505 VIRTIO_USER_ARG_PATH); 506 goto end; 507 } 508 509 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 510 if (is_vhost_user_by_type(path)) { 511 PMD_INIT_LOG(ERR, 512 "arg %s applies only to vhost-kernel backend", 513 VIRTIO_USER_ARG_INTERFACE_NAME); 514 goto end; 515 } 516 517 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 518 &get_string_arg, &ifname) < 0) { 519 PMD_INIT_LOG(ERR, "error to parse %s", 520 VIRTIO_USER_ARG_INTERFACE_NAME); 521 goto end; 522 } 523 } 524 525 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 526 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 527 &get_string_arg, &mac_addr) < 0) { 528 PMD_INIT_LOG(ERR, "error to parse %s", 529 VIRTIO_USER_ARG_MAC); 530 goto end; 531 } 532 } 533 534 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 535 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 536 &get_integer_arg, &queue_size) < 0) { 537 PMD_INIT_LOG(ERR, "error to parse %s", 538 VIRTIO_USER_ARG_QUEUE_SIZE); 539 goto end; 540 } 541 } 542 543 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 544 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 545 &get_integer_arg, &queues) < 0) { 546 PMD_INIT_LOG(ERR, "error to parse %s", 547 VIRTIO_USER_ARG_QUEUES_NUM); 548 goto end; 549 } 550 } 551 552 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 553 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 554 &get_integer_arg, &server_mode) < 0) { 555 PMD_INIT_LOG(ERR, "error to parse %s", 556 VIRTIO_USER_ARG_SERVER_MODE); 557 goto end; 558 } 559 } 560 561 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 562 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 563 &get_integer_arg, &cq) < 0) { 564 PMD_INIT_LOG(ERR, "error to parse %s", 565 VIRTIO_USER_ARG_CQ_NUM); 566 goto end; 567 } 568 } else if (queues > 1) { 569 cq = 1; 570 } 571 572 if (queues > 1 && cq == 0) { 573 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 574 goto end; 575 } 576 577 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 578 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 579 VIRTIO_USER_ARG_QUEUES_NUM, queues, 580 VIRTIO_MAX_VIRTQUEUE_PAIRS); 581 goto end; 582 } 583 584 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 585 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 586 &get_integer_arg, &mrg_rxbuf) < 0) { 587 PMD_INIT_LOG(ERR, "error to parse %s", 588 VIRTIO_USER_ARG_MRG_RXBUF); 589 goto end; 590 } 591 } 592 593 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 594 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 595 &get_integer_arg, &in_order) < 0) { 596 PMD_INIT_LOG(ERR, "error to parse %s", 597 VIRTIO_USER_ARG_IN_ORDER); 598 goto end; 599 } 600 } 601 602 eth_dev = virtio_user_eth_dev_alloc(dev); 603 if (!eth_dev) { 604 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 605 goto end; 606 } 607 608 hw = eth_dev->data->dev_private; 609 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, 610 queue_size, mac_addr, &ifname, server_mode, 611 mrg_rxbuf, in_order) < 0) { 612 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 613 virtio_user_eth_dev_free(eth_dev); 614 goto end; 615 } 616 617 /* previously called by rte_pci_probe() for physical dev */ 618 if (eth_virtio_dev_init(eth_dev) < 0) { 619 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 620 virtio_user_eth_dev_free(eth_dev); 621 goto end; 622 } 623 624 rte_eth_dev_probing_finish(eth_dev); 625 ret = 0; 626 627 end: 628 if (kvlist) 629 rte_kvargs_free(kvlist); 630 if (path) 631 free(path); 632 if (mac_addr) 633 free(mac_addr); 634 if (ifname) 635 free(ifname); 636 return ret; 637 } 638 639 static int 640 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 641 { 642 const char *name; 643 struct rte_eth_dev *eth_dev; 644 struct virtio_hw *hw; 645 struct virtio_user_dev *dev; 646 647 if (!vdev) 648 return -EINVAL; 649 650 name = rte_vdev_device_name(vdev); 651 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 652 eth_dev = rte_eth_dev_allocated(name); 653 if (!eth_dev) 654 return -ENODEV; 655 656 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 657 return rte_eth_dev_release_port(eth_dev); 658 659 /* make sure the device is stopped, queues freed */ 660 rte_eth_dev_close(eth_dev->data->port_id); 661 662 hw = eth_dev->data->dev_private; 663 dev = hw->virtio_user_dev; 664 virtio_user_dev_uninit(dev); 665 666 rte_eth_dev_release_port(eth_dev); 667 668 return 0; 669 } 670 671 static struct rte_vdev_driver virtio_user_driver = { 672 .probe = virtio_user_pmd_probe, 673 .remove = virtio_user_pmd_remove, 674 }; 675 676 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 677 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 678 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 679 "path=<path> " 680 "mac=<mac addr> " 681 "cq=<int> " 682 "queue_size=<int> " 683 "queues=<int> " 684 "iface=<string> " 685 "server=<0|1> " 686 "mrg_rxbuf=<0|1> " 687 "in_order=<0|1>"); 688