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 #include <rte_cycles.h> 17 18 #include "virtio_ethdev.h" 19 #include "virtio_logs.h" 20 #include "virtio_pci.h" 21 #include "virtqueue.h" 22 #include "virtio_rxtx.h" 23 #include "virtio_user/virtio_user_dev.h" 24 #include "virtio_user/vhost.h" 25 26 #define virtio_user_get_dev(hw) \ 27 ((struct virtio_user_dev *)(hw)->virtio_user_dev) 28 29 static void 30 virtio_user_reset_queues_packed(struct rte_eth_dev *dev) 31 { 32 struct virtio_hw *hw = dev->data->dev_private; 33 struct virtnet_rx *rxvq; 34 struct virtnet_tx *txvq; 35 uint16_t i; 36 37 /* Add lock to avoid queue contention. */ 38 rte_spinlock_lock(&hw->state_lock); 39 hw->started = 0; 40 41 /* 42 * Waitting for datapath to complete before resetting queues. 43 * 1 ms should be enough for the ongoing Tx/Rx function to finish. 44 */ 45 rte_delay_ms(1); 46 47 /* Vring reset for each Tx queue and Rx queue. */ 48 for (i = 0; i < dev->data->nb_rx_queues; i++) { 49 rxvq = dev->data->rx_queues[i]; 50 virtqueue_rxvq_reset_packed(rxvq->vq); 51 virtio_dev_rx_queue_setup_finish(dev, i); 52 } 53 54 for (i = 0; i < dev->data->nb_tx_queues; i++) { 55 txvq = dev->data->tx_queues[i]; 56 virtqueue_txvq_reset_packed(txvq->vq); 57 } 58 59 hw->started = 1; 60 rte_spinlock_unlock(&hw->state_lock); 61 } 62 63 64 static int 65 virtio_user_server_reconnect(struct virtio_user_dev *dev) 66 { 67 int ret; 68 int connectfd; 69 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id]; 70 struct virtio_hw *hw = eth_dev->data->dev_private; 71 uint64_t protocol_features; 72 73 connectfd = accept(dev->listenfd, NULL, NULL); 74 if (connectfd < 0) 75 return -1; 76 77 dev->vhostfd = connectfd; 78 if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES, 79 &dev->device_features) < 0) { 80 PMD_INIT_LOG(ERR, "get_features failed: %s", 81 strerror(errno)); 82 return -1; 83 } 84 85 if (dev->device_features & 86 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) { 87 if (dev->ops->send_request(dev, 88 VHOST_USER_GET_PROTOCOL_FEATURES, 89 &protocol_features)) 90 return -1; 91 92 dev->protocol_features &= protocol_features; 93 94 if (dev->ops->send_request(dev, 95 VHOST_USER_SET_PROTOCOL_FEATURES, 96 &dev->protocol_features)) 97 return -1; 98 99 if (!(dev->protocol_features & 100 (1ULL << VHOST_USER_PROTOCOL_F_MQ))) 101 dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ); 102 } 103 104 dev->device_features |= dev->frontend_features; 105 106 /* umask vhost-user unsupported features */ 107 dev->device_features &= ~(dev->unsupported_features); 108 109 dev->features &= dev->device_features; 110 111 /* For packed ring, resetting queues is required in reconnection. */ 112 if (vtpci_packed_queue(hw) && 113 (vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_DRIVER_OK)) { 114 PMD_INIT_LOG(NOTICE, "Packets on the fly will be dropped" 115 " when packed ring reconnecting."); 116 virtio_user_reset_queues_packed(eth_dev); 117 } 118 119 ret = virtio_user_start_device(dev); 120 if (ret < 0) 121 return -1; 122 123 if (dev->queue_pairs > 1) { 124 ret = virtio_user_handle_mq(dev, dev->queue_pairs); 125 if (ret != 0) { 126 PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!"); 127 return -1; 128 } 129 } 130 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { 131 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 132 PMD_DRV_LOG(ERR, "interrupt disable failed"); 133 return -1; 134 } 135 rte_intr_callback_unregister(eth_dev->intr_handle, 136 virtio_interrupt_handler, 137 eth_dev); 138 eth_dev->intr_handle->fd = connectfd; 139 rte_intr_callback_register(eth_dev->intr_handle, 140 virtio_interrupt_handler, eth_dev); 141 142 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 143 PMD_DRV_LOG(ERR, "interrupt enable failed"); 144 return -1; 145 } 146 } 147 PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!"); 148 return 0; 149 } 150 151 static void 152 virtio_user_delayed_handler(void *param) 153 { 154 struct virtio_hw *hw = (struct virtio_hw *)param; 155 struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id]; 156 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 157 158 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 159 PMD_DRV_LOG(ERR, "interrupt disable failed"); 160 return; 161 } 162 rte_intr_callback_unregister(eth_dev->intr_handle, 163 virtio_interrupt_handler, eth_dev); 164 if (dev->is_server) { 165 if (dev->vhostfd >= 0) { 166 close(dev->vhostfd); 167 dev->vhostfd = -1; 168 } 169 eth_dev->intr_handle->fd = dev->listenfd; 170 rte_intr_callback_register(eth_dev->intr_handle, 171 virtio_interrupt_handler, eth_dev); 172 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 173 PMD_DRV_LOG(ERR, "interrupt enable failed"); 174 return; 175 } 176 } 177 } 178 179 static void 180 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, 181 void *dst, int length) 182 { 183 int i; 184 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 185 186 if (offset == offsetof(struct virtio_net_config, mac) && 187 length == RTE_ETHER_ADDR_LEN) { 188 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 189 ((uint8_t *)dst)[i] = dev->mac_addr[i]; 190 return; 191 } 192 193 if (offset == offsetof(struct virtio_net_config, status)) { 194 char buf[128]; 195 196 if (dev->vhostfd >= 0) { 197 int r; 198 int flags; 199 200 flags = fcntl(dev->vhostfd, F_GETFL); 201 if (fcntl(dev->vhostfd, F_SETFL, 202 flags | O_NONBLOCK) == -1) { 203 PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag"); 204 return; 205 } 206 r = recv(dev->vhostfd, buf, 128, MSG_PEEK); 207 if (r == 0 || (r < 0 && errno != EAGAIN)) { 208 dev->net_status &= (~VIRTIO_NET_S_LINK_UP); 209 PMD_DRV_LOG(ERR, "virtio-user port %u is down", 210 hw->port_id); 211 212 /* This function could be called in the process 213 * of interrupt handling, callback cannot be 214 * unregistered here, set an alarm to do it. 215 */ 216 rte_eal_alarm_set(1, 217 virtio_user_delayed_handler, 218 (void *)hw); 219 } else { 220 dev->net_status |= VIRTIO_NET_S_LINK_UP; 221 } 222 if (fcntl(dev->vhostfd, F_SETFL, 223 flags & ~O_NONBLOCK) == -1) { 224 PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag"); 225 return; 226 } 227 } else if (dev->is_server) { 228 dev->net_status &= (~VIRTIO_NET_S_LINK_UP); 229 if (virtio_user_server_reconnect(dev) >= 0) 230 dev->net_status |= VIRTIO_NET_S_LINK_UP; 231 } 232 233 *(uint16_t *)dst = dev->net_status; 234 } 235 236 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) 237 *(uint16_t *)dst = dev->max_queue_pairs; 238 } 239 240 static void 241 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, 242 const void *src, int length) 243 { 244 int i; 245 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 246 247 if ((offset == offsetof(struct virtio_net_config, mac)) && 248 (length == RTE_ETHER_ADDR_LEN)) 249 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 250 dev->mac_addr[i] = ((const uint8_t *)src)[i]; 251 else 252 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", 253 offset, length); 254 } 255 256 static void 257 virtio_user_reset(struct virtio_hw *hw) 258 { 259 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 260 261 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 262 virtio_user_stop_device(dev); 263 } 264 265 static void 266 virtio_user_set_status(struct virtio_hw *hw, uint8_t status) 267 { 268 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 269 270 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 271 virtio_user_start_device(dev); 272 else if (status == VIRTIO_CONFIG_STATUS_RESET) 273 virtio_user_reset(hw); 274 dev->status = status; 275 } 276 277 static uint8_t 278 virtio_user_get_status(struct virtio_hw *hw) 279 { 280 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 281 282 return dev->status; 283 } 284 285 static uint64_t 286 virtio_user_get_features(struct virtio_hw *hw) 287 { 288 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 289 290 /* unmask feature bits defined in vhost user protocol */ 291 return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; 292 } 293 294 static void 295 virtio_user_set_features(struct virtio_hw *hw, uint64_t features) 296 { 297 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 298 299 dev->features = features & dev->device_features; 300 } 301 302 static uint8_t 303 virtio_user_get_isr(struct virtio_hw *hw __rte_unused) 304 { 305 /* rxq interrupts and config interrupt are separated in virtio-user, 306 * here we only report config change. 307 */ 308 return VIRTIO_PCI_ISR_CONFIG; 309 } 310 311 static uint16_t 312 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, 313 uint16_t vec __rte_unused) 314 { 315 return 0; 316 } 317 318 static uint16_t 319 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, 320 struct virtqueue *vq __rte_unused, 321 uint16_t vec) 322 { 323 /* pretend we have done that */ 324 return vec; 325 } 326 327 /* This function is to get the queue size, aka, number of descs, of a specified 328 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the 329 * max supported queues. 330 */ 331 static uint16_t 332 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused) 333 { 334 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 335 336 /* Currently, each queue has same queue size */ 337 return dev->queue_size; 338 } 339 340 static void 341 virtio_user_setup_queue_packed(struct virtqueue *vq, 342 struct virtio_user_dev *dev) 343 { 344 uint16_t queue_idx = vq->vq_queue_index; 345 struct vring_packed *vring; 346 uint64_t desc_addr; 347 uint64_t avail_addr; 348 uint64_t used_addr; 349 uint16_t i; 350 351 vring = &dev->packed_vrings[queue_idx]; 352 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 353 avail_addr = desc_addr + vq->vq_nentries * 354 sizeof(struct vring_packed_desc); 355 used_addr = RTE_ALIGN_CEIL(avail_addr + 356 sizeof(struct vring_packed_desc_event), 357 VIRTIO_PCI_VRING_ALIGN); 358 vring->num = vq->vq_nentries; 359 vring->desc = (void *)(uintptr_t)desc_addr; 360 vring->driver = (void *)(uintptr_t)avail_addr; 361 vring->device = (void *)(uintptr_t)used_addr; 362 dev->packed_queues[queue_idx].avail_wrap_counter = true; 363 dev->packed_queues[queue_idx].used_wrap_counter = true; 364 365 for (i = 0; i < vring->num; i++) 366 vring->desc[i].flags = 0; 367 } 368 369 static void 370 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 371 { 372 uint16_t queue_idx = vq->vq_queue_index; 373 uint64_t desc_addr, avail_addr, used_addr; 374 375 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 376 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 377 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 378 ring[vq->vq_nentries]), 379 VIRTIO_PCI_VRING_ALIGN); 380 381 dev->vrings[queue_idx].num = vq->vq_nentries; 382 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 383 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 384 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 385 } 386 387 static int 388 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 389 { 390 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 391 392 if (vtpci_packed_queue(hw)) 393 virtio_user_setup_queue_packed(vq, dev); 394 else 395 virtio_user_setup_queue_split(vq, dev); 396 397 return 0; 398 } 399 400 static void 401 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 402 { 403 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 404 * correspondingly stops the ioeventfds, and reset the status of 405 * the device. 406 * For modern devices, set queue desc, avail, used in PCI bar to 0, 407 * not see any more behavior in QEMU. 408 * 409 * Here we just care about what information to deliver to vhost-user 410 * or vhost-kernel. So we just close ioeventfd for now. 411 */ 412 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 413 414 close(dev->callfds[vq->vq_queue_index]); 415 close(dev->kickfds[vq->vq_queue_index]); 416 } 417 418 static void 419 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 420 { 421 uint64_t buf = 1; 422 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 423 424 if (hw->cvq && (hw->cvq->vq == vq)) { 425 if (vtpci_packed_queue(vq->hw)) 426 virtio_user_handle_cq_packed(dev, vq->vq_queue_index); 427 else 428 virtio_user_handle_cq(dev, vq->vq_queue_index); 429 return; 430 } 431 432 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 433 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 434 strerror(errno)); 435 } 436 437 const struct virtio_pci_ops virtio_user_ops = { 438 .read_dev_cfg = virtio_user_read_dev_config, 439 .write_dev_cfg = virtio_user_write_dev_config, 440 .get_status = virtio_user_get_status, 441 .set_status = virtio_user_set_status, 442 .get_features = virtio_user_get_features, 443 .set_features = virtio_user_set_features, 444 .get_isr = virtio_user_get_isr, 445 .set_config_irq = virtio_user_set_config_irq, 446 .set_queue_irq = virtio_user_set_queue_irq, 447 .get_queue_num = virtio_user_get_queue_num, 448 .setup_queue = virtio_user_setup_queue, 449 .del_queue = virtio_user_del_queue, 450 .notify_queue = virtio_user_notify_queue, 451 }; 452 453 static const char *valid_args[] = { 454 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 455 VIRTIO_USER_ARG_QUEUES_NUM, 456 #define VIRTIO_USER_ARG_CQ_NUM "cq" 457 VIRTIO_USER_ARG_CQ_NUM, 458 #define VIRTIO_USER_ARG_MAC "mac" 459 VIRTIO_USER_ARG_MAC, 460 #define VIRTIO_USER_ARG_PATH "path" 461 VIRTIO_USER_ARG_PATH, 462 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 463 VIRTIO_USER_ARG_QUEUE_SIZE, 464 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 465 VIRTIO_USER_ARG_INTERFACE_NAME, 466 #define VIRTIO_USER_ARG_SERVER_MODE "server" 467 VIRTIO_USER_ARG_SERVER_MODE, 468 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 469 VIRTIO_USER_ARG_MRG_RXBUF, 470 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 471 VIRTIO_USER_ARG_IN_ORDER, 472 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 473 VIRTIO_USER_ARG_PACKED_VQ, 474 #define VIRTIO_USER_ARG_SPEED "speed" 475 VIRTIO_USER_ARG_SPEED, 476 #define VIRTIO_USER_ARG_VECTORIZED "vectorized" 477 VIRTIO_USER_ARG_VECTORIZED, 478 NULL 479 }; 480 481 #define VIRTIO_USER_DEF_CQ_EN 0 482 #define VIRTIO_USER_DEF_Q_NUM 1 483 #define VIRTIO_USER_DEF_Q_SZ 256 484 #define VIRTIO_USER_DEF_SERVER_MODE 0 485 486 static int 487 get_string_arg(const char *key __rte_unused, 488 const char *value, void *extra_args) 489 { 490 if (!value || !extra_args) 491 return -EINVAL; 492 493 *(char **)extra_args = strdup(value); 494 495 if (!*(char **)extra_args) 496 return -ENOMEM; 497 498 return 0; 499 } 500 501 static int 502 get_integer_arg(const char *key __rte_unused, 503 const char *value, void *extra_args) 504 { 505 uint64_t integer = 0; 506 if (!value || !extra_args) 507 return -EINVAL; 508 errno = 0; 509 integer = strtoull(value, NULL, 0); 510 /* extra_args keeps default value, it should be replaced 511 * only in case of successful parsing of the 'value' arg 512 */ 513 if (errno == 0) 514 *(uint64_t *)extra_args = integer; 515 return -errno; 516 } 517 518 static struct rte_eth_dev * 519 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 520 { 521 struct rte_eth_dev *eth_dev; 522 struct rte_eth_dev_data *data; 523 struct virtio_hw *hw; 524 struct virtio_user_dev *dev; 525 526 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); 527 if (!eth_dev) { 528 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 529 return NULL; 530 } 531 532 data = eth_dev->data; 533 hw = eth_dev->data->dev_private; 534 535 dev = rte_zmalloc(NULL, sizeof(*dev), 0); 536 if (!dev) { 537 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); 538 rte_eth_dev_release_port(eth_dev); 539 return NULL; 540 } 541 542 hw->port_id = data->port_id; 543 dev->port_id = data->port_id; 544 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; 545 /* 546 * MSIX is required to enable LSC (see virtio_init_device). 547 * Here just pretend that we support msix. 548 */ 549 hw->use_msix = 1; 550 hw->modern = 0; 551 hw->use_vec_rx = 0; 552 hw->use_vec_tx = 0; 553 hw->use_inorder_rx = 0; 554 hw->use_inorder_tx = 0; 555 hw->virtio_user_dev = dev; 556 return eth_dev; 557 } 558 559 static void 560 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 561 { 562 struct rte_eth_dev_data *data = eth_dev->data; 563 struct virtio_hw *hw = data->dev_private; 564 565 rte_free(hw->virtio_user_dev); 566 rte_eth_dev_release_port(eth_dev); 567 } 568 569 /* Dev initialization routine. Invoked once for each virtio vdev at 570 * EAL init time, see rte_bus_probe(). 571 * Returns 0 on success. 572 */ 573 static int 574 virtio_user_pmd_probe(struct rte_vdev_device *dev) 575 { 576 struct rte_kvargs *kvlist = NULL; 577 struct rte_eth_dev *eth_dev; 578 struct virtio_hw *hw; 579 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 580 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 581 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 582 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 583 uint64_t mrg_rxbuf = 1; 584 uint64_t in_order = 1; 585 uint64_t packed_vq = 0; 586 uint64_t vectorized = 0; 587 char *path = NULL; 588 char *ifname = NULL; 589 char *mac_addr = NULL; 590 int ret = -1; 591 592 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 593 const char *name = rte_vdev_device_name(dev); 594 eth_dev = rte_eth_dev_attach_secondary(name); 595 if (!eth_dev) { 596 PMD_INIT_LOG(ERR, "Failed to probe %s", name); 597 return -1; 598 } 599 600 if (eth_virtio_dev_init(eth_dev) < 0) { 601 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 602 rte_eth_dev_release_port(eth_dev); 603 return -1; 604 } 605 606 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops; 607 eth_dev->device = &dev->device; 608 rte_eth_dev_probing_finish(eth_dev); 609 return 0; 610 } 611 612 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); 613 if (!kvlist) { 614 PMD_INIT_LOG(ERR, "error when parsing param"); 615 goto end; 616 } 617 618 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 619 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 620 &get_string_arg, &path) < 0) { 621 PMD_INIT_LOG(ERR, "error to parse %s", 622 VIRTIO_USER_ARG_PATH); 623 goto end; 624 } 625 } else { 626 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 627 VIRTIO_USER_ARG_PATH); 628 goto end; 629 } 630 631 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 632 if (is_vhost_user_by_type(path)) { 633 PMD_INIT_LOG(ERR, 634 "arg %s applies only to vhost-kernel backend", 635 VIRTIO_USER_ARG_INTERFACE_NAME); 636 goto end; 637 } 638 639 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 640 &get_string_arg, &ifname) < 0) { 641 PMD_INIT_LOG(ERR, "error to parse %s", 642 VIRTIO_USER_ARG_INTERFACE_NAME); 643 goto end; 644 } 645 } 646 647 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 648 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 649 &get_string_arg, &mac_addr) < 0) { 650 PMD_INIT_LOG(ERR, "error to parse %s", 651 VIRTIO_USER_ARG_MAC); 652 goto end; 653 } 654 } 655 656 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 657 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 658 &get_integer_arg, &queue_size) < 0) { 659 PMD_INIT_LOG(ERR, "error to parse %s", 660 VIRTIO_USER_ARG_QUEUE_SIZE); 661 goto end; 662 } 663 } 664 665 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 666 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 667 &get_integer_arg, &queues) < 0) { 668 PMD_INIT_LOG(ERR, "error to parse %s", 669 VIRTIO_USER_ARG_QUEUES_NUM); 670 goto end; 671 } 672 } 673 674 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 675 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 676 &get_integer_arg, &server_mode) < 0) { 677 PMD_INIT_LOG(ERR, "error to parse %s", 678 VIRTIO_USER_ARG_SERVER_MODE); 679 goto end; 680 } 681 } 682 683 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 684 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 685 &get_integer_arg, &cq) < 0) { 686 PMD_INIT_LOG(ERR, "error to parse %s", 687 VIRTIO_USER_ARG_CQ_NUM); 688 goto end; 689 } 690 } else if (queues > 1) { 691 cq = 1; 692 } 693 694 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 695 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 696 &get_integer_arg, &packed_vq) < 0) { 697 PMD_INIT_LOG(ERR, "error to parse %s", 698 VIRTIO_USER_ARG_PACKED_VQ); 699 goto end; 700 } 701 } 702 703 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) { 704 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED, 705 &get_integer_arg, &vectorized) < 0) { 706 PMD_INIT_LOG(ERR, "error to parse %s", 707 VIRTIO_USER_ARG_VECTORIZED); 708 goto end; 709 } 710 } 711 712 if (queues > 1 && cq == 0) { 713 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 714 goto end; 715 } 716 717 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 718 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 719 VIRTIO_USER_ARG_QUEUES_NUM, queues, 720 VIRTIO_MAX_VIRTQUEUE_PAIRS); 721 goto end; 722 } 723 724 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 725 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 726 &get_integer_arg, &mrg_rxbuf) < 0) { 727 PMD_INIT_LOG(ERR, "error to parse %s", 728 VIRTIO_USER_ARG_MRG_RXBUF); 729 goto end; 730 } 731 } 732 733 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 734 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 735 &get_integer_arg, &in_order) < 0) { 736 PMD_INIT_LOG(ERR, "error to parse %s", 737 VIRTIO_USER_ARG_IN_ORDER); 738 goto end; 739 } 740 } 741 742 eth_dev = virtio_user_eth_dev_alloc(dev); 743 if (!eth_dev) { 744 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 745 goto end; 746 } 747 748 hw = eth_dev->data->dev_private; 749 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, 750 queue_size, mac_addr, &ifname, server_mode, 751 mrg_rxbuf, in_order, packed_vq) < 0) { 752 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 753 virtio_user_eth_dev_free(eth_dev); 754 goto end; 755 } 756 757 /* previously called by pci probing for physical dev */ 758 if (eth_virtio_dev_init(eth_dev) < 0) { 759 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 760 virtio_user_eth_dev_free(eth_dev); 761 goto end; 762 } 763 764 if (vectorized) { 765 if (packed_vq) { 766 #if defined(CC_AVX512_SUPPORT) 767 hw->use_vec_rx = 1; 768 hw->use_vec_tx = 1; 769 #else 770 PMD_INIT_LOG(INFO, 771 "building environment do not support packed ring vectorized"); 772 #endif 773 } else { 774 hw->use_vec_rx = 1; 775 } 776 } 777 778 rte_eth_dev_probing_finish(eth_dev); 779 ret = 0; 780 781 end: 782 if (kvlist) 783 rte_kvargs_free(kvlist); 784 if (path) 785 free(path); 786 if (mac_addr) 787 free(mac_addr); 788 if (ifname) 789 free(ifname); 790 return ret; 791 } 792 793 static int 794 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 795 { 796 const char *name; 797 struct rte_eth_dev *eth_dev; 798 799 if (!vdev) 800 return -EINVAL; 801 802 name = rte_vdev_device_name(vdev); 803 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 804 eth_dev = rte_eth_dev_allocated(name); 805 /* Port has already been released by close. */ 806 if (!eth_dev) 807 return 0; 808 809 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 810 return rte_eth_dev_release_port(eth_dev); 811 812 /* make sure the device is stopped, queues freed */ 813 rte_eth_dev_close(eth_dev->data->port_id); 814 815 return 0; 816 } 817 818 static struct rte_vdev_driver virtio_user_driver = { 819 .probe = virtio_user_pmd_probe, 820 .remove = virtio_user_pmd_remove, 821 }; 822 823 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 824 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 825 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 826 "path=<path> " 827 "mac=<mac addr> " 828 "cq=<int> " 829 "queue_size=<int> " 830 "queues=<int> " 831 "iface=<string> " 832 "server=<0|1> " 833 "mrg_rxbuf=<0|1> " 834 "in_order=<0|1> " 835 "packed_vq=<0|1> " 836 "speed=<int> " 837 "vectorized=<0|1>"); 838