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