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 { 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_packed = 295 (void *)(uintptr_t)desc_addr; 296 vring->driver_event = 297 (void *)(uintptr_t)avail_addr; 298 vring->device_event = 299 (void *)(uintptr_t)used_addr; 300 dev->packed_queues[queue_idx].avail_wrap_counter = true; 301 dev->packed_queues[queue_idx].used_wrap_counter = true; 302 303 for (i = 0; i < vring->num; i++) { 304 vring->desc_packed[i].flags = VRING_DESC_F_USED(1) | 305 VRING_DESC_F_AVAIL(1); 306 } 307 } 308 309 static void 310 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 311 { 312 uint16_t queue_idx = vq->vq_queue_index; 313 uint64_t desc_addr, avail_addr, used_addr; 314 315 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 316 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 317 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 318 ring[vq->vq_nentries]), 319 VIRTIO_PCI_VRING_ALIGN); 320 321 dev->vrings[queue_idx].num = vq->vq_nentries; 322 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 323 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 324 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 325 } 326 327 static int 328 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 329 { 330 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 331 332 if (vtpci_packed_queue(hw)) 333 virtio_user_setup_queue_packed(vq, dev); 334 else 335 virtio_user_setup_queue_split(vq, dev); 336 337 return 0; 338 } 339 340 static void 341 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 342 { 343 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 344 * correspondingly stops the ioeventfds, and reset the status of 345 * the device. 346 * For modern devices, set queue desc, avail, used in PCI bar to 0, 347 * not see any more behavior in QEMU. 348 * 349 * Here we just care about what information to deliver to vhost-user 350 * or vhost-kernel. So we just close ioeventfd for now. 351 */ 352 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 353 354 close(dev->callfds[vq->vq_queue_index]); 355 close(dev->kickfds[vq->vq_queue_index]); 356 } 357 358 static void 359 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 360 { 361 uint64_t buf = 1; 362 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 363 364 if (hw->cvq && (hw->cvq->vq == vq)) { 365 if (vtpci_packed_queue(vq->hw)) 366 virtio_user_handle_cq_packed(dev, vq->vq_queue_index); 367 else 368 virtio_user_handle_cq(dev, vq->vq_queue_index); 369 return; 370 } 371 372 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 373 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 374 strerror(errno)); 375 } 376 377 const struct virtio_pci_ops virtio_user_ops = { 378 .read_dev_cfg = virtio_user_read_dev_config, 379 .write_dev_cfg = virtio_user_write_dev_config, 380 .get_status = virtio_user_get_status, 381 .set_status = virtio_user_set_status, 382 .get_features = virtio_user_get_features, 383 .set_features = virtio_user_set_features, 384 .get_isr = virtio_user_get_isr, 385 .set_config_irq = virtio_user_set_config_irq, 386 .set_queue_irq = virtio_user_set_queue_irq, 387 .get_queue_num = virtio_user_get_queue_num, 388 .setup_queue = virtio_user_setup_queue, 389 .del_queue = virtio_user_del_queue, 390 .notify_queue = virtio_user_notify_queue, 391 }; 392 393 static const char *valid_args[] = { 394 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 395 VIRTIO_USER_ARG_QUEUES_NUM, 396 #define VIRTIO_USER_ARG_CQ_NUM "cq" 397 VIRTIO_USER_ARG_CQ_NUM, 398 #define VIRTIO_USER_ARG_MAC "mac" 399 VIRTIO_USER_ARG_MAC, 400 #define VIRTIO_USER_ARG_PATH "path" 401 VIRTIO_USER_ARG_PATH, 402 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 403 VIRTIO_USER_ARG_QUEUE_SIZE, 404 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 405 VIRTIO_USER_ARG_INTERFACE_NAME, 406 #define VIRTIO_USER_ARG_SERVER_MODE "server" 407 VIRTIO_USER_ARG_SERVER_MODE, 408 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 409 VIRTIO_USER_ARG_MRG_RXBUF, 410 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 411 VIRTIO_USER_ARG_IN_ORDER, 412 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 413 VIRTIO_USER_ARG_PACKED_VQ, 414 NULL 415 }; 416 417 #define VIRTIO_USER_DEF_CQ_EN 0 418 #define VIRTIO_USER_DEF_Q_NUM 1 419 #define VIRTIO_USER_DEF_Q_SZ 256 420 #define VIRTIO_USER_DEF_SERVER_MODE 0 421 422 static int 423 get_string_arg(const char *key __rte_unused, 424 const char *value, void *extra_args) 425 { 426 if (!value || !extra_args) 427 return -EINVAL; 428 429 *(char **)extra_args = strdup(value); 430 431 if (!*(char **)extra_args) 432 return -ENOMEM; 433 434 return 0; 435 } 436 437 static int 438 get_integer_arg(const char *key __rte_unused, 439 const char *value, void *extra_args) 440 { 441 if (!value || !extra_args) 442 return -EINVAL; 443 444 *(uint64_t *)extra_args = strtoull(value, NULL, 0); 445 446 return 0; 447 } 448 449 static struct rte_vdev_driver virtio_user_driver; 450 451 static struct rte_eth_dev * 452 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 453 { 454 struct rte_eth_dev *eth_dev; 455 struct rte_eth_dev_data *data; 456 struct virtio_hw *hw; 457 struct virtio_user_dev *dev; 458 459 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw)); 460 if (!eth_dev) { 461 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 462 return NULL; 463 } 464 465 data = eth_dev->data; 466 hw = eth_dev->data->dev_private; 467 468 dev = rte_zmalloc(NULL, sizeof(*dev), 0); 469 if (!dev) { 470 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed"); 471 rte_eth_dev_release_port(eth_dev); 472 return NULL; 473 } 474 475 hw->port_id = data->port_id; 476 dev->port_id = data->port_id; 477 virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops; 478 /* 479 * MSIX is required to enable LSC (see virtio_init_device). 480 * Here just pretend that we support msix. 481 */ 482 hw->use_msix = 1; 483 hw->modern = 0; 484 hw->use_simple_rx = 0; 485 hw->use_inorder_rx = 0; 486 hw->use_inorder_tx = 0; 487 hw->virtio_user_dev = dev; 488 return eth_dev; 489 } 490 491 static void 492 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 493 { 494 struct rte_eth_dev_data *data = eth_dev->data; 495 struct virtio_hw *hw = data->dev_private; 496 497 rte_free(hw->virtio_user_dev); 498 rte_eth_dev_release_port(eth_dev); 499 } 500 501 /* Dev initialization routine. Invoked once for each virtio vdev at 502 * EAL init time, see rte_bus_probe(). 503 * Returns 0 on success. 504 */ 505 static int 506 virtio_user_pmd_probe(struct rte_vdev_device *dev) 507 { 508 struct rte_kvargs *kvlist = NULL; 509 struct rte_eth_dev *eth_dev; 510 struct virtio_hw *hw; 511 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 512 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 513 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 514 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 515 uint64_t mrg_rxbuf = 1; 516 uint64_t in_order = 1; 517 uint64_t packed_vq = 0; 518 char *path = NULL; 519 char *ifname = NULL; 520 char *mac_addr = NULL; 521 int ret = -1; 522 523 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); 524 if (!kvlist) { 525 PMD_INIT_LOG(ERR, "error when parsing param"); 526 goto end; 527 } 528 529 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 530 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 531 &get_string_arg, &path) < 0) { 532 PMD_INIT_LOG(ERR, "error to parse %s", 533 VIRTIO_USER_ARG_PATH); 534 goto end; 535 } 536 } else { 537 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 538 VIRTIO_USER_ARG_PATH); 539 goto end; 540 } 541 542 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 543 if (is_vhost_user_by_type(path)) { 544 PMD_INIT_LOG(ERR, 545 "arg %s applies only to vhost-kernel backend", 546 VIRTIO_USER_ARG_INTERFACE_NAME); 547 goto end; 548 } 549 550 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 551 &get_string_arg, &ifname) < 0) { 552 PMD_INIT_LOG(ERR, "error to parse %s", 553 VIRTIO_USER_ARG_INTERFACE_NAME); 554 goto end; 555 } 556 } 557 558 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 559 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 560 &get_string_arg, &mac_addr) < 0) { 561 PMD_INIT_LOG(ERR, "error to parse %s", 562 VIRTIO_USER_ARG_MAC); 563 goto end; 564 } 565 } 566 567 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 568 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 569 &get_integer_arg, &queue_size) < 0) { 570 PMD_INIT_LOG(ERR, "error to parse %s", 571 VIRTIO_USER_ARG_QUEUE_SIZE); 572 goto end; 573 } 574 } 575 576 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 577 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 578 &get_integer_arg, &queues) < 0) { 579 PMD_INIT_LOG(ERR, "error to parse %s", 580 VIRTIO_USER_ARG_QUEUES_NUM); 581 goto end; 582 } 583 } 584 585 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 586 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 587 &get_integer_arg, &server_mode) < 0) { 588 PMD_INIT_LOG(ERR, "error to parse %s", 589 VIRTIO_USER_ARG_SERVER_MODE); 590 goto end; 591 } 592 } 593 594 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 595 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 596 &get_integer_arg, &cq) < 0) { 597 PMD_INIT_LOG(ERR, "error to parse %s", 598 VIRTIO_USER_ARG_CQ_NUM); 599 goto end; 600 } 601 } else if (queues > 1) { 602 cq = 1; 603 } 604 605 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 606 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 607 &get_integer_arg, &packed_vq) < 0) { 608 PMD_INIT_LOG(ERR, "error to parse %s", 609 VIRTIO_USER_ARG_PACKED_VQ); 610 goto end; 611 } 612 } 613 614 if (queues > 1 && cq == 0) { 615 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 616 goto end; 617 } 618 619 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 620 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 621 VIRTIO_USER_ARG_QUEUES_NUM, queues, 622 VIRTIO_MAX_VIRTQUEUE_PAIRS); 623 goto end; 624 } 625 626 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 627 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 628 &get_integer_arg, &mrg_rxbuf) < 0) { 629 PMD_INIT_LOG(ERR, "error to parse %s", 630 VIRTIO_USER_ARG_MRG_RXBUF); 631 goto end; 632 } 633 } 634 635 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 636 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 637 &get_integer_arg, &in_order) < 0) { 638 PMD_INIT_LOG(ERR, "error to parse %s", 639 VIRTIO_USER_ARG_IN_ORDER); 640 goto end; 641 } 642 } 643 644 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 645 struct virtio_user_dev *vu_dev; 646 647 eth_dev = virtio_user_eth_dev_alloc(dev); 648 if (!eth_dev) { 649 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 650 goto end; 651 } 652 653 hw = eth_dev->data->dev_private; 654 vu_dev = virtio_user_get_dev(hw); 655 if (server_mode == 1) 656 vu_dev->is_server = true; 657 else 658 vu_dev->is_server = false; 659 if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, 660 queue_size, mac_addr, &ifname, mrg_rxbuf, 661 in_order, packed_vq) < 0) { 662 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 663 virtio_user_eth_dev_free(eth_dev); 664 goto end; 665 } 666 667 } else { 668 eth_dev = rte_eth_dev_attach_secondary(rte_vdev_device_name(dev)); 669 if (!eth_dev) 670 goto end; 671 } 672 673 /* previously called by rte_pci_probe() for physical dev */ 674 if (eth_virtio_dev_init(eth_dev) < 0) { 675 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 676 virtio_user_eth_dev_free(eth_dev); 677 goto end; 678 } 679 680 rte_eth_dev_probing_finish(eth_dev); 681 ret = 0; 682 683 end: 684 if (kvlist) 685 rte_kvargs_free(kvlist); 686 if (path) 687 free(path); 688 if (mac_addr) 689 free(mac_addr); 690 if (ifname) 691 free(ifname); 692 return ret; 693 } 694 695 static int 696 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 697 { 698 const char *name; 699 struct rte_eth_dev *eth_dev; 700 struct virtio_hw *hw; 701 struct virtio_user_dev *dev; 702 703 if (!vdev) 704 return -EINVAL; 705 706 name = rte_vdev_device_name(vdev); 707 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 708 eth_dev = rte_eth_dev_allocated(name); 709 if (!eth_dev) 710 return -ENODEV; 711 712 /* make sure the device is stopped, queues freed */ 713 rte_eth_dev_close(eth_dev->data->port_id); 714 715 hw = eth_dev->data->dev_private; 716 dev = hw->virtio_user_dev; 717 virtio_user_dev_uninit(dev); 718 719 rte_eth_dev_release_port(eth_dev); 720 721 return 0; 722 } 723 724 static struct rte_vdev_driver virtio_user_driver = { 725 .probe = virtio_user_pmd_probe, 726 .remove = virtio_user_pmd_remove, 727 }; 728 729 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 730 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 731 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 732 "path=<path> " 733 "mac=<mac addr> " 734 "cq=<int> " 735 "queue_size=<int> " 736 "queues=<int> " 737 "iface=<string> " 738 "server=<0|1> " 739 "mrg_rxbuf=<0|1> " 740 "in_order=<0|1> " 741 "packed_vq=<0|1>"); 742