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 void 275 virtio_user_setup_queue_packed(struct virtqueue *vq, 276 struct virtio_user_dev *dev) 277 { 278 uint16_t queue_idx = vq->vq_queue_index; 279 struct vring_packed *vring; 280 uint64_t desc_addr; 281 uint64_t avail_addr; 282 uint64_t used_addr; 283 uint16_t i; 284 285 vring = &dev->packed_vrings[queue_idx]; 286 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 287 avail_addr = desc_addr + vq->vq_nentries * 288 sizeof(struct vring_packed_desc); 289 used_addr = RTE_ALIGN_CEIL(avail_addr + 290 sizeof(struct vring_packed_desc_event), 291 VIRTIO_PCI_VRING_ALIGN); 292 vring->num = vq->vq_nentries; 293 vring->desc = (void *)(uintptr_t)desc_addr; 294 vring->driver = (void *)(uintptr_t)avail_addr; 295 vring->device = (void *)(uintptr_t)used_addr; 296 dev->packed_queues[queue_idx].avail_wrap_counter = true; 297 dev->packed_queues[queue_idx].used_wrap_counter = true; 298 299 for (i = 0; i < vring->num; i++) 300 vring->desc[i].flags = 0; 301 } 302 303 static void 304 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 305 { 306 uint16_t queue_idx = vq->vq_queue_index; 307 uint64_t desc_addr, avail_addr, used_addr; 308 309 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 310 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 311 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 312 ring[vq->vq_nentries]), 313 VIRTIO_PCI_VRING_ALIGN); 314 315 dev->vrings[queue_idx].num = vq->vq_nentries; 316 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 317 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 318 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 319 } 320 321 static int 322 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 323 { 324 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 325 326 if (vtpci_packed_queue(hw)) 327 virtio_user_setup_queue_packed(vq, dev); 328 else 329 virtio_user_setup_queue_split(vq, dev); 330 331 return 0; 332 } 333 334 static void 335 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 336 { 337 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 338 * correspondingly stops the ioeventfds, and reset the status of 339 * the device. 340 * For modern devices, set queue desc, avail, used in PCI bar to 0, 341 * not see any more behavior in QEMU. 342 * 343 * Here we just care about what information to deliver to vhost-user 344 * or vhost-kernel. So we just close ioeventfd for now. 345 */ 346 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 347 348 close(dev->callfds[vq->vq_queue_index]); 349 close(dev->kickfds[vq->vq_queue_index]); 350 } 351 352 static void 353 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 354 { 355 uint64_t buf = 1; 356 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 357 358 if (hw->cvq && (hw->cvq->vq == vq)) { 359 if (vtpci_packed_queue(vq->hw)) 360 virtio_user_handle_cq_packed(dev, vq->vq_queue_index); 361 else 362 virtio_user_handle_cq(dev, vq->vq_queue_index); 363 return; 364 } 365 366 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 367 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 368 strerror(errno)); 369 } 370 371 const struct virtio_pci_ops virtio_user_ops = { 372 .read_dev_cfg = virtio_user_read_dev_config, 373 .write_dev_cfg = virtio_user_write_dev_config, 374 .get_status = virtio_user_get_status, 375 .set_status = virtio_user_set_status, 376 .get_features = virtio_user_get_features, 377 .set_features = virtio_user_set_features, 378 .get_isr = virtio_user_get_isr, 379 .set_config_irq = virtio_user_set_config_irq, 380 .set_queue_irq = virtio_user_set_queue_irq, 381 .get_queue_num = virtio_user_get_queue_num, 382 .setup_queue = virtio_user_setup_queue, 383 .del_queue = virtio_user_del_queue, 384 .notify_queue = virtio_user_notify_queue, 385 }; 386 387 static const char *valid_args[] = { 388 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 389 VIRTIO_USER_ARG_QUEUES_NUM, 390 #define VIRTIO_USER_ARG_CQ_NUM "cq" 391 VIRTIO_USER_ARG_CQ_NUM, 392 #define VIRTIO_USER_ARG_MAC "mac" 393 VIRTIO_USER_ARG_MAC, 394 #define VIRTIO_USER_ARG_PATH "path" 395 VIRTIO_USER_ARG_PATH, 396 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 397 VIRTIO_USER_ARG_QUEUE_SIZE, 398 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 399 VIRTIO_USER_ARG_INTERFACE_NAME, 400 #define VIRTIO_USER_ARG_SERVER_MODE "server" 401 VIRTIO_USER_ARG_SERVER_MODE, 402 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 403 VIRTIO_USER_ARG_MRG_RXBUF, 404 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 405 VIRTIO_USER_ARG_IN_ORDER, 406 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 407 VIRTIO_USER_ARG_PACKED_VQ, 408 NULL 409 }; 410 411 #define VIRTIO_USER_DEF_CQ_EN 0 412 #define VIRTIO_USER_DEF_Q_NUM 1 413 #define VIRTIO_USER_DEF_Q_SZ 256 414 #define VIRTIO_USER_DEF_SERVER_MODE 0 415 416 static int 417 get_string_arg(const char *key __rte_unused, 418 const char *value, void *extra_args) 419 { 420 if (!value || !extra_args) 421 return -EINVAL; 422 423 *(char **)extra_args = strdup(value); 424 425 if (!*(char **)extra_args) 426 return -ENOMEM; 427 428 return 0; 429 } 430 431 static int 432 get_integer_arg(const char *key __rte_unused, 433 const char *value, void *extra_args) 434 { 435 if (!value || !extra_args) 436 return -EINVAL; 437 438 *(uint64_t *)extra_args = strtoull(value, NULL, 0); 439 440 return 0; 441 } 442 443 static struct rte_vdev_driver virtio_user_driver; 444 445 static struct rte_eth_dev * 446 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 447 { 448 struct rte_eth_dev *eth_dev; 449 struct rte_eth_dev_data *data; 450 struct virtio_hw *hw; 451 struct virtio_user_dev *dev; 452 453 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); 454 if (!eth_dev) { 455 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 456 return NULL; 457 } 458 459 data = eth_dev->data; 460 hw = eth_dev->data->dev_private; 461 462 dev = rte_zmalloc(NULL, sizeof(*dev), 0); 463 if (!dev) { 464 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); 465 rte_eth_dev_release_port(eth_dev); 466 return NULL; 467 } 468 469 hw->port_id = data->port_id; 470 dev->port_id = data->port_id; 471 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; 472 /* 473 * MSIX is required to enable LSC (see virtio_init_device). 474 * Here just pretend that we support msix. 475 */ 476 hw->use_msix = 1; 477 hw->modern = 0; 478 hw->use_simple_rx = 0; 479 hw->use_inorder_rx = 0; 480 hw->use_inorder_tx = 0; 481 hw->virtio_user_dev = dev; 482 return eth_dev; 483 } 484 485 static void 486 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 487 { 488 struct rte_eth_dev_data *data = eth_dev->data; 489 struct virtio_hw *hw = data->dev_private; 490 491 rte_free(hw->virtio_user_dev); 492 rte_eth_dev_release_port(eth_dev); 493 } 494 495 /* Dev initialization routine. Invoked once for each virtio vdev at 496 * EAL init time, see rte_bus_probe(). 497 * Returns 0 on success. 498 */ 499 static int 500 virtio_user_pmd_probe(struct rte_vdev_device *dev) 501 { 502 struct rte_kvargs *kvlist = NULL; 503 struct rte_eth_dev *eth_dev; 504 struct virtio_hw *hw; 505 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 506 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 507 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 508 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 509 uint64_t mrg_rxbuf = 1; 510 uint64_t in_order = 1; 511 uint64_t packed_vq = 0; 512 char *path = NULL; 513 char *ifname = NULL; 514 char *mac_addr = NULL; 515 int ret = -1; 516 517 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); 518 if (!kvlist) { 519 PMD_INIT_LOG(ERR, "error when parsing param"); 520 goto end; 521 } 522 523 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 524 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 525 &get_string_arg, &path) < 0) { 526 PMD_INIT_LOG(ERR, "error to parse %s", 527 VIRTIO_USER_ARG_PATH); 528 goto end; 529 } 530 } else { 531 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 532 VIRTIO_USER_ARG_PATH); 533 goto end; 534 } 535 536 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 537 if (is_vhost_user_by_type(path)) { 538 PMD_INIT_LOG(ERR, 539 "arg %s applies only to vhost-kernel backend", 540 VIRTIO_USER_ARG_INTERFACE_NAME); 541 goto end; 542 } 543 544 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 545 &get_string_arg, &ifname) < 0) { 546 PMD_INIT_LOG(ERR, "error to parse %s", 547 VIRTIO_USER_ARG_INTERFACE_NAME); 548 goto end; 549 } 550 } 551 552 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 553 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 554 &get_string_arg, &mac_addr) < 0) { 555 PMD_INIT_LOG(ERR, "error to parse %s", 556 VIRTIO_USER_ARG_MAC); 557 goto end; 558 } 559 } 560 561 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 562 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 563 &get_integer_arg, &queue_size) < 0) { 564 PMD_INIT_LOG(ERR, "error to parse %s", 565 VIRTIO_USER_ARG_QUEUE_SIZE); 566 goto end; 567 } 568 } 569 570 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 571 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 572 &get_integer_arg, &queues) < 0) { 573 PMD_INIT_LOG(ERR, "error to parse %s", 574 VIRTIO_USER_ARG_QUEUES_NUM); 575 goto end; 576 } 577 } 578 579 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 580 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 581 &get_integer_arg, &server_mode) < 0) { 582 PMD_INIT_LOG(ERR, "error to parse %s", 583 VIRTIO_USER_ARG_SERVER_MODE); 584 goto end; 585 } 586 } 587 588 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 589 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 590 &get_integer_arg, &cq) < 0) { 591 PMD_INIT_LOG(ERR, "error to parse %s", 592 VIRTIO_USER_ARG_CQ_NUM); 593 goto end; 594 } 595 } else if (queues > 1) { 596 cq = 1; 597 } 598 599 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 600 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 601 &get_integer_arg, &packed_vq) < 0) { 602 PMD_INIT_LOG(ERR, "error to parse %s", 603 VIRTIO_USER_ARG_PACKED_VQ); 604 goto end; 605 } 606 } 607 608 if (queues > 1 && cq == 0) { 609 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 610 goto end; 611 } 612 613 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 614 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 615 VIRTIO_USER_ARG_QUEUES_NUM, queues, 616 VIRTIO_MAX_VIRTQUEUE_PAIRS); 617 goto end; 618 } 619 620 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 621 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 622 &get_integer_arg, &mrg_rxbuf) < 0) { 623 PMD_INIT_LOG(ERR, "error to parse %s", 624 VIRTIO_USER_ARG_MRG_RXBUF); 625 goto end; 626 } 627 } 628 629 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 630 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 631 &get_integer_arg, &in_order) < 0) { 632 PMD_INIT_LOG(ERR, "error to parse %s", 633 VIRTIO_USER_ARG_IN_ORDER); 634 goto end; 635 } 636 } 637 638 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 639 struct virtio_user_dev *vu_dev; 640 641 eth_dev = virtio_user_eth_dev_alloc(dev); 642 if (!eth_dev) { 643 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 644 goto end; 645 } 646 647 hw = eth_dev->data->dev_private; 648 vu_dev = virtio_user_get_dev(hw); 649 if (server_mode == 1) 650 vu_dev->is_server = true; 651 else 652 vu_dev->is_server = false; 653 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, 654 queue_size, mac_addr, &ifname, mrg_rxbuf, 655 in_order, packed_vq) < 0) { 656 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 657 virtio_user_eth_dev_free(eth_dev); 658 goto end; 659 } 660 661 } else { 662 eth_dev = rte_eth_dev_attach_secondary(rte_vdev_device_name(dev)); 663 if (!eth_dev) 664 goto end; 665 } 666 667 /* previously called by rte_pci_probe() for physical dev */ 668 if (eth_virtio_dev_init(eth_dev) < 0) { 669 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 670 virtio_user_eth_dev_free(eth_dev); 671 goto end; 672 } 673 674 rte_eth_dev_probing_finish(eth_dev); 675 ret = 0; 676 677 end: 678 if (kvlist) 679 rte_kvargs_free(kvlist); 680 if (path) 681 free(path); 682 if (mac_addr) 683 free(mac_addr); 684 if (ifname) 685 free(ifname); 686 return ret; 687 } 688 689 static int 690 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 691 { 692 const char *name; 693 struct rte_eth_dev *eth_dev; 694 struct virtio_hw *hw; 695 struct virtio_user_dev *dev; 696 697 if (!vdev) 698 return -EINVAL; 699 700 name = rte_vdev_device_name(vdev); 701 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 702 eth_dev = rte_eth_dev_allocated(name); 703 if (!eth_dev) 704 return -ENODEV; 705 706 /* make sure the device is stopped, queues freed */ 707 rte_eth_dev_close(eth_dev->data->port_id); 708 709 hw = eth_dev->data->dev_private; 710 dev = hw->virtio_user_dev; 711 virtio_user_dev_uninit(dev); 712 713 rte_eth_dev_release_port(eth_dev); 714 715 return 0; 716 } 717 718 static struct rte_vdev_driver virtio_user_driver = { 719 .probe = virtio_user_pmd_probe, 720 .remove = virtio_user_pmd_remove, 721 }; 722 723 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 724 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 725 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 726 "path=<path> " 727 "mac=<mac addr> " 728 "cq=<int> " 729 "queue_size=<int> " 730 "queues=<int> " 731 "iface=<string> " 732 "server=<0|1> " 733 "mrg_rxbuf=<0|1> " 734 "in_order=<0|1> " 735 "packed_vq=<0|1>"); 736