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 #include "virtio_user/vhost.h" 24 25 #define virtio_user_get_dev(hw) \ 26 ((struct virtio_user_dev *)(hw)->virtio_user_dev) 27 28 static int 29 virtio_user_server_reconnect(struct virtio_user_dev *dev) 30 { 31 int ret; 32 int connectfd; 33 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id]; 34 35 connectfd = accept(dev->listenfd, NULL, NULL); 36 if (connectfd < 0) 37 return -1; 38 39 dev->vhostfd = connectfd; 40 if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES, 41 &dev->device_features) < 0) { 42 PMD_INIT_LOG(ERR, "get_features failed: %s", 43 strerror(errno)); 44 return -1; 45 } 46 47 dev->device_features |= dev->frontend_features; 48 49 /* umask vhost-user unsupported features */ 50 dev->device_features &= ~(dev->unsupported_features); 51 52 dev->features &= dev->device_features; 53 54 ret = virtio_user_start_device(dev); 55 if (ret < 0) 56 return -1; 57 58 if (dev->queue_pairs > 1) { 59 ret = virtio_user_handle_mq(dev, dev->queue_pairs); 60 if (ret != 0) { 61 PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!"); 62 return -1; 63 } 64 } 65 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { 66 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 67 PMD_DRV_LOG(ERR, "interrupt disable failed"); 68 return -1; 69 } 70 rte_intr_callback_unregister(eth_dev->intr_handle, 71 virtio_interrupt_handler, 72 eth_dev); 73 eth_dev->intr_handle->fd = connectfd; 74 rte_intr_callback_register(eth_dev->intr_handle, 75 virtio_interrupt_handler, eth_dev); 76 77 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 78 PMD_DRV_LOG(ERR, "interrupt enable failed"); 79 return -1; 80 } 81 } 82 PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!"); 83 return 0; 84 } 85 86 static void 87 virtio_user_delayed_handler(void *param) 88 { 89 struct virtio_hw *hw = (struct virtio_hw *)param; 90 struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id]; 91 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 92 93 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 94 PMD_DRV_LOG(ERR, "interrupt disable failed"); 95 return; 96 } 97 rte_intr_callback_unregister(eth_dev->intr_handle, 98 virtio_interrupt_handler, eth_dev); 99 if (dev->is_server) { 100 if (dev->vhostfd >= 0) { 101 close(dev->vhostfd); 102 dev->vhostfd = -1; 103 } 104 eth_dev->intr_handle->fd = dev->listenfd; 105 rte_intr_callback_register(eth_dev->intr_handle, 106 virtio_interrupt_handler, eth_dev); 107 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 108 PMD_DRV_LOG(ERR, "interrupt enable failed"); 109 return; 110 } 111 } 112 } 113 114 static void 115 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, 116 void *dst, int length) 117 { 118 int i; 119 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 120 121 if (offset == offsetof(struct virtio_net_config, mac) && 122 length == RTE_ETHER_ADDR_LEN) { 123 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 124 ((uint8_t *)dst)[i] = dev->mac_addr[i]; 125 return; 126 } 127 128 if (offset == offsetof(struct virtio_net_config, status)) { 129 char buf[128]; 130 131 if (dev->vhostfd >= 0) { 132 int r; 133 int flags; 134 135 flags = fcntl(dev->vhostfd, F_GETFL); 136 if (fcntl(dev->vhostfd, F_SETFL, 137 flags | O_NONBLOCK) == -1) { 138 PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag"); 139 return; 140 } 141 r = recv(dev->vhostfd, buf, 128, MSG_PEEK); 142 if (r == 0 || (r < 0 && errno != EAGAIN)) { 143 dev->status &= (~VIRTIO_NET_S_LINK_UP); 144 PMD_DRV_LOG(ERR, "virtio-user port %u is down", 145 hw->port_id); 146 147 /* This function could be called in the process 148 * of interrupt handling, callback cannot be 149 * unregistered here, set an alarm to do it. 150 */ 151 rte_eal_alarm_set(1, 152 virtio_user_delayed_handler, 153 (void *)hw); 154 } else { 155 dev->status |= VIRTIO_NET_S_LINK_UP; 156 } 157 if (fcntl(dev->vhostfd, F_SETFL, 158 flags & ~O_NONBLOCK) == -1) { 159 PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag"); 160 return; 161 } 162 } else if (dev->is_server) { 163 dev->status &= (~VIRTIO_NET_S_LINK_UP); 164 if (virtio_user_server_reconnect(dev) >= 0) 165 dev->status |= VIRTIO_NET_S_LINK_UP; 166 } 167 168 *(uint16_t *)dst = dev->status; 169 } 170 171 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) 172 *(uint16_t *)dst = dev->max_queue_pairs; 173 } 174 175 static void 176 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, 177 const void *src, int length) 178 { 179 int i; 180 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 181 182 if ((offset == offsetof(struct virtio_net_config, mac)) && 183 (length == RTE_ETHER_ADDR_LEN)) 184 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 185 dev->mac_addr[i] = ((const uint8_t *)src)[i]; 186 else 187 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", 188 offset, length); 189 } 190 191 static void 192 virtio_user_reset(struct virtio_hw *hw) 193 { 194 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 195 196 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 197 virtio_user_stop_device(dev); 198 } 199 200 static void 201 virtio_user_set_status(struct virtio_hw *hw, uint8_t status) 202 { 203 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 204 205 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 206 virtio_user_start_device(dev); 207 else if (status == VIRTIO_CONFIG_STATUS_RESET) 208 virtio_user_reset(hw); 209 dev->status = status; 210 } 211 212 static uint8_t 213 virtio_user_get_status(struct virtio_hw *hw) 214 { 215 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 216 217 return dev->status; 218 } 219 220 static uint64_t 221 virtio_user_get_features(struct virtio_hw *hw) 222 { 223 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 224 225 /* unmask feature bits defined in vhost user protocol */ 226 return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; 227 } 228 229 static void 230 virtio_user_set_features(struct virtio_hw *hw, uint64_t features) 231 { 232 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 233 234 dev->features = features & dev->device_features; 235 } 236 237 static uint8_t 238 virtio_user_get_isr(struct virtio_hw *hw __rte_unused) 239 { 240 /* rxq interrupts and config interrupt are separated in virtio-user, 241 * here we only report config change. 242 */ 243 return VIRTIO_PCI_ISR_CONFIG; 244 } 245 246 static uint16_t 247 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, 248 uint16_t vec __rte_unused) 249 { 250 return 0; 251 } 252 253 static uint16_t 254 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, 255 struct virtqueue *vq __rte_unused, 256 uint16_t vec) 257 { 258 /* pretend we have done that */ 259 return vec; 260 } 261 262 /* This function is to get the queue size, aka, number of descs, of a specified 263 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the 264 * max supported queues. 265 */ 266 static uint16_t 267 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused) 268 { 269 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 270 271 /* Currently, each queue has same queue size */ 272 return dev->queue_size; 273 } 274 275 static void 276 virtio_user_setup_queue_packed(struct virtqueue *vq, 277 struct virtio_user_dev *dev) 278 { 279 uint16_t queue_idx = vq->vq_queue_index; 280 struct vring_packed *vring; 281 uint64_t desc_addr; 282 uint64_t avail_addr; 283 uint64_t used_addr; 284 uint16_t i; 285 286 vring = &dev->packed_vrings[queue_idx]; 287 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 288 avail_addr = desc_addr + vq->vq_nentries * 289 sizeof(struct vring_packed_desc); 290 used_addr = RTE_ALIGN_CEIL(avail_addr + 291 sizeof(struct vring_packed_desc_event), 292 VIRTIO_PCI_VRING_ALIGN); 293 vring->num = vq->vq_nentries; 294 vring->desc = (void *)(uintptr_t)desc_addr; 295 vring->driver = (void *)(uintptr_t)avail_addr; 296 vring->device = (void *)(uintptr_t)used_addr; 297 dev->packed_queues[queue_idx].avail_wrap_counter = true; 298 dev->packed_queues[queue_idx].used_wrap_counter = true; 299 300 for (i = 0; i < vring->num; i++) 301 vring->desc[i].flags = 0; 302 } 303 304 static void 305 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 306 { 307 uint16_t queue_idx = vq->vq_queue_index; 308 uint64_t desc_addr, avail_addr, used_addr; 309 310 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 311 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 312 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 313 ring[vq->vq_nentries]), 314 VIRTIO_PCI_VRING_ALIGN); 315 316 dev->vrings[queue_idx].num = vq->vq_nentries; 317 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 318 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 319 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 320 } 321 322 static int 323 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 324 { 325 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 326 327 if (vtpci_packed_queue(hw)) 328 virtio_user_setup_queue_packed(vq, dev); 329 else 330 virtio_user_setup_queue_split(vq, dev); 331 332 return 0; 333 } 334 335 static void 336 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 337 { 338 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 339 * correspondingly stops the ioeventfds, and reset the status of 340 * the device. 341 * For modern devices, set queue desc, avail, used in PCI bar to 0, 342 * not see any more behavior in QEMU. 343 * 344 * Here we just care about what information to deliver to vhost-user 345 * or vhost-kernel. So we just close ioeventfd for now. 346 */ 347 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 348 349 close(dev->callfds[vq->vq_queue_index]); 350 close(dev->kickfds[vq->vq_queue_index]); 351 } 352 353 static void 354 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 355 { 356 uint64_t buf = 1; 357 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 358 359 if (hw->cvq && (hw->cvq->vq == vq)) { 360 if (vtpci_packed_queue(vq->hw)) 361 virtio_user_handle_cq_packed(dev, vq->vq_queue_index); 362 else 363 virtio_user_handle_cq(dev, vq->vq_queue_index); 364 return; 365 } 366 367 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 368 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 369 strerror(errno)); 370 } 371 372 const struct virtio_pci_ops virtio_user_ops = { 373 .read_dev_cfg = virtio_user_read_dev_config, 374 .write_dev_cfg = virtio_user_write_dev_config, 375 .get_status = virtio_user_get_status, 376 .set_status = virtio_user_set_status, 377 .get_features = virtio_user_get_features, 378 .set_features = virtio_user_set_features, 379 .get_isr = virtio_user_get_isr, 380 .set_config_irq = virtio_user_set_config_irq, 381 .set_queue_irq = virtio_user_set_queue_irq, 382 .get_queue_num = virtio_user_get_queue_num, 383 .setup_queue = virtio_user_setup_queue, 384 .del_queue = virtio_user_del_queue, 385 .notify_queue = virtio_user_notify_queue, 386 }; 387 388 static const char *valid_args[] = { 389 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 390 VIRTIO_USER_ARG_QUEUES_NUM, 391 #define VIRTIO_USER_ARG_CQ_NUM "cq" 392 VIRTIO_USER_ARG_CQ_NUM, 393 #define VIRTIO_USER_ARG_MAC "mac" 394 VIRTIO_USER_ARG_MAC, 395 #define VIRTIO_USER_ARG_PATH "path" 396 VIRTIO_USER_ARG_PATH, 397 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 398 VIRTIO_USER_ARG_QUEUE_SIZE, 399 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 400 VIRTIO_USER_ARG_INTERFACE_NAME, 401 #define VIRTIO_USER_ARG_SERVER_MODE "server" 402 VIRTIO_USER_ARG_SERVER_MODE, 403 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 404 VIRTIO_USER_ARG_MRG_RXBUF, 405 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 406 VIRTIO_USER_ARG_IN_ORDER, 407 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 408 VIRTIO_USER_ARG_PACKED_VQ, 409 NULL 410 }; 411 412 #define VIRTIO_USER_DEF_CQ_EN 0 413 #define VIRTIO_USER_DEF_Q_NUM 1 414 #define VIRTIO_USER_DEF_Q_SZ 256 415 #define VIRTIO_USER_DEF_SERVER_MODE 0 416 417 static int 418 get_string_arg(const char *key __rte_unused, 419 const char *value, void *extra_args) 420 { 421 if (!value || !extra_args) 422 return -EINVAL; 423 424 *(char **)extra_args = strdup(value); 425 426 if (!*(char **)extra_args) 427 return -ENOMEM; 428 429 return 0; 430 } 431 432 static int 433 get_integer_arg(const char *key __rte_unused, 434 const char *value, void *extra_args) 435 { 436 if (!value || !extra_args) 437 return -EINVAL; 438 439 *(uint64_t *)extra_args = strtoull(value, NULL, 0); 440 441 return 0; 442 } 443 444 static struct rte_eth_dev * 445 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 446 { 447 struct rte_eth_dev *eth_dev; 448 struct rte_eth_dev_data *data; 449 struct virtio_hw *hw; 450 struct virtio_user_dev *dev; 451 452 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); 453 if (!eth_dev) { 454 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 455 return NULL; 456 } 457 458 data = eth_dev->data; 459 hw = eth_dev->data->dev_private; 460 461 dev = rte_zmalloc(NULL, sizeof(*dev), 0); 462 if (!dev) { 463 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); 464 rte_eth_dev_release_port(eth_dev); 465 return NULL; 466 } 467 468 hw->port_id = data->port_id; 469 dev->port_id = data->port_id; 470 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; 471 /* 472 * MSIX is required to enable LSC (see virtio_init_device). 473 * Here just pretend that we support msix. 474 */ 475 hw->use_msix = 1; 476 hw->modern = 0; 477 hw->use_simple_rx = 0; 478 hw->use_inorder_rx = 0; 479 hw->use_inorder_tx = 0; 480 hw->virtio_user_dev = dev; 481 return eth_dev; 482 } 483 484 static void 485 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 486 { 487 struct rte_eth_dev_data *data = eth_dev->data; 488 struct virtio_hw *hw = data->dev_private; 489 490 rte_free(hw->virtio_user_dev); 491 rte_eth_dev_release_port(eth_dev); 492 } 493 494 /* Dev initialization routine. Invoked once for each virtio vdev at 495 * EAL init time, see rte_bus_probe(). 496 * Returns 0 on success. 497 */ 498 static int 499 virtio_user_pmd_probe(struct rte_vdev_device *dev) 500 { 501 struct rte_kvargs *kvlist = NULL; 502 struct rte_eth_dev *eth_dev; 503 struct virtio_hw *hw; 504 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 505 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 506 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 507 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 508 uint64_t mrg_rxbuf = 1; 509 uint64_t in_order = 1; 510 uint64_t packed_vq = 0; 511 char *path = NULL; 512 char *ifname = NULL; 513 char *mac_addr = NULL; 514 int ret = -1; 515 516 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 517 const char *name = rte_vdev_device_name(dev); 518 eth_dev = rte_eth_dev_attach_secondary(name); 519 if (!eth_dev) { 520 RTE_LOG(ERR, PMD, "Failed to probe %s\n", name); 521 return -1; 522 } 523 524 if (eth_virtio_dev_init(eth_dev) < 0) { 525 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 526 rte_eth_dev_release_port(eth_dev); 527 return -1; 528 } 529 530 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops; 531 eth_dev->device = &dev->device; 532 rte_eth_dev_probing_finish(eth_dev); 533 return 0; 534 } 535 536 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); 537 if (!kvlist) { 538 PMD_INIT_LOG(ERR, "error when parsing param"); 539 goto end; 540 } 541 542 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 543 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 544 &get_string_arg, &path) < 0) { 545 PMD_INIT_LOG(ERR, "error to parse %s", 546 VIRTIO_USER_ARG_PATH); 547 goto end; 548 } 549 } else { 550 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 551 VIRTIO_USER_ARG_PATH); 552 goto end; 553 } 554 555 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 556 if (is_vhost_user_by_type(path)) { 557 PMD_INIT_LOG(ERR, 558 "arg %s applies only to vhost-kernel backend", 559 VIRTIO_USER_ARG_INTERFACE_NAME); 560 goto end; 561 } 562 563 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 564 &get_string_arg, &ifname) < 0) { 565 PMD_INIT_LOG(ERR, "error to parse %s", 566 VIRTIO_USER_ARG_INTERFACE_NAME); 567 goto end; 568 } 569 } 570 571 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 572 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 573 &get_string_arg, &mac_addr) < 0) { 574 PMD_INIT_LOG(ERR, "error to parse %s", 575 VIRTIO_USER_ARG_MAC); 576 goto end; 577 } 578 } 579 580 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 581 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 582 &get_integer_arg, &queue_size) < 0) { 583 PMD_INIT_LOG(ERR, "error to parse %s", 584 VIRTIO_USER_ARG_QUEUE_SIZE); 585 goto end; 586 } 587 } 588 589 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 590 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 591 &get_integer_arg, &queues) < 0) { 592 PMD_INIT_LOG(ERR, "error to parse %s", 593 VIRTIO_USER_ARG_QUEUES_NUM); 594 goto end; 595 } 596 } 597 598 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 599 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 600 &get_integer_arg, &server_mode) < 0) { 601 PMD_INIT_LOG(ERR, "error to parse %s", 602 VIRTIO_USER_ARG_SERVER_MODE); 603 goto end; 604 } 605 } 606 607 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 608 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 609 &get_integer_arg, &cq) < 0) { 610 PMD_INIT_LOG(ERR, "error to parse %s", 611 VIRTIO_USER_ARG_CQ_NUM); 612 goto end; 613 } 614 } else if (queues > 1) { 615 cq = 1; 616 } 617 618 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 619 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 620 &get_integer_arg, &packed_vq) < 0) { 621 PMD_INIT_LOG(ERR, "error to parse %s", 622 VIRTIO_USER_ARG_PACKED_VQ); 623 goto end; 624 } 625 } 626 627 if (queues > 1 && cq == 0) { 628 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 629 goto end; 630 } 631 632 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 633 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 634 VIRTIO_USER_ARG_QUEUES_NUM, queues, 635 VIRTIO_MAX_VIRTQUEUE_PAIRS); 636 goto end; 637 } 638 639 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 640 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 641 &get_integer_arg, &mrg_rxbuf) < 0) { 642 PMD_INIT_LOG(ERR, "error to parse %s", 643 VIRTIO_USER_ARG_MRG_RXBUF); 644 goto end; 645 } 646 } 647 648 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 649 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 650 &get_integer_arg, &in_order) < 0) { 651 PMD_INIT_LOG(ERR, "error to parse %s", 652 VIRTIO_USER_ARG_IN_ORDER); 653 goto end; 654 } 655 } 656 657 eth_dev = virtio_user_eth_dev_alloc(dev); 658 if (!eth_dev) { 659 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 660 goto end; 661 } 662 663 hw = eth_dev->data->dev_private; 664 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, 665 queue_size, mac_addr, &ifname, server_mode, 666 mrg_rxbuf, in_order, packed_vq) < 0) { 667 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 668 virtio_user_eth_dev_free(eth_dev); 669 goto end; 670 } 671 672 /* previously called by rte_pci_probe() for physical dev */ 673 if (eth_virtio_dev_init(eth_dev) < 0) { 674 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 675 virtio_user_eth_dev_free(eth_dev); 676 goto end; 677 } 678 679 rte_eth_dev_probing_finish(eth_dev); 680 ret = 0; 681 682 end: 683 if (kvlist) 684 rte_kvargs_free(kvlist); 685 if (path) 686 free(path); 687 if (mac_addr) 688 free(mac_addr); 689 if (ifname) 690 free(ifname); 691 return ret; 692 } 693 694 static int 695 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 696 { 697 const char *name; 698 struct rte_eth_dev *eth_dev; 699 700 if (!vdev) 701 return -EINVAL; 702 703 name = rte_vdev_device_name(vdev); 704 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 705 eth_dev = rte_eth_dev_allocated(name); 706 /* Port has already been released by close. */ 707 if (!eth_dev) 708 return 0; 709 710 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 711 return rte_eth_dev_release_port(eth_dev); 712 713 /* make sure the device is stopped, queues freed */ 714 rte_eth_dev_close(eth_dev->data->port_id); 715 716 return 0; 717 } 718 719 static struct rte_vdev_driver virtio_user_driver = { 720 .probe = virtio_user_pmd_probe, 721 .remove = virtio_user_pmd_remove, 722 }; 723 724 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 725 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 726 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 727 "path=<path> " 728 "mac=<mac addr> " 729 "cq=<int> " 730 "queue_size=<int> " 731 "queues=<int> " 732 "iface=<string> " 733 "server=<0|1> " 734 "mrg_rxbuf=<0|1> " 735 "in_order=<0|1> " 736 "packed_vq=<0|1>"); 737