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 <linux/major.h> 10 #include <sys/stat.h> 11 #include <sys/sysmacros.h> 12 #include <sys/socket.h> 13 14 #include <rte_malloc.h> 15 #include <rte_kvargs.h> 16 #include <ethdev_vdev.h> 17 #include <rte_bus_vdev.h> 18 #include <rte_alarm.h> 19 #include <rte_cycles.h> 20 21 #include "virtio_ethdev.h" 22 #include "virtio_logs.h" 23 #include "virtio.h" 24 #include "virtqueue.h" 25 #include "virtio_rxtx.h" 26 #include "virtio_user/virtio_user_dev.h" 27 #include "virtio_user/vhost.h" 28 29 #define virtio_user_get_dev(hwp) container_of(hwp, struct virtio_user_dev, hw) 30 31 static void 32 virtio_user_reset_queues_packed(struct rte_eth_dev *eth_dev) 33 { 34 struct virtio_user_dev *dev = eth_dev->data->dev_private; 35 struct virtio_hw *hw = &dev->hw; 36 struct virtnet_rx *rxvq; 37 struct virtnet_tx *txvq; 38 uint16_t i; 39 40 /* Add lock to avoid queue contention. */ 41 rte_spinlock_lock(&hw->state_lock); 42 hw->started = 0; 43 44 /* 45 * Waitting for datapath to complete before resetting queues. 46 * 1 ms should be enough for the ongoing Tx/Rx function to finish. 47 */ 48 rte_delay_ms(1); 49 50 /* Vring reset for each Tx queue and Rx queue. */ 51 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) { 52 rxvq = eth_dev->data->rx_queues[i]; 53 virtqueue_rxvq_reset_packed(rxvq->vq); 54 virtio_dev_rx_queue_setup_finish(eth_dev, i); 55 } 56 57 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) { 58 txvq = eth_dev->data->tx_queues[i]; 59 virtqueue_txvq_reset_packed(txvq->vq); 60 } 61 62 hw->started = 1; 63 rte_spinlock_unlock(&hw->state_lock); 64 } 65 66 67 static int 68 virtio_user_server_reconnect(struct virtio_user_dev *dev) 69 { 70 int ret, connectfd, old_status; 71 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id]; 72 struct virtio_hw *hw = &dev->hw; 73 uint64_t protocol_features; 74 75 connectfd = accept(dev->listenfd, NULL, NULL); 76 if (connectfd < 0) 77 return -1; 78 79 dev->vhostfd = connectfd; 80 old_status = dev->status; 81 82 virtio_reset(hw); 83 84 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 85 86 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 87 88 if (dev->ops->get_features(dev, &dev->device_features) < 0) { 89 PMD_INIT_LOG(ERR, "get_features failed: %s", 90 strerror(errno)); 91 return -1; 92 } 93 94 if (dev->device_features & 95 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) { 96 if (dev->ops->get_protocol_features(dev, &protocol_features)) 97 return -1; 98 99 /* Offer VHOST_USER_PROTOCOL_F_STATUS */ 100 dev->protocol_features |= (1ULL << VHOST_USER_PROTOCOL_F_STATUS); 101 dev->protocol_features &= protocol_features; 102 103 if (dev->ops->set_protocol_features(dev, dev->protocol_features)) 104 return -1; 105 106 if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ))) 107 dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ); 108 } 109 110 dev->device_features |= dev->frontend_features; 111 112 /* umask vhost-user unsupported features */ 113 dev->device_features &= ~(dev->unsupported_features); 114 115 dev->features &= dev->device_features; 116 117 /* For packed ring, resetting queues is required in reconnection. */ 118 if (virtio_with_packed_queue(hw) && 119 (old_status & VIRTIO_CONFIG_STATUS_DRIVER_OK)) { 120 PMD_INIT_LOG(NOTICE, "Packets on the fly will be dropped" 121 " when packed ring reconnecting."); 122 virtio_user_reset_queues_packed(eth_dev); 123 } 124 125 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); 126 127 /* Start the device */ 128 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK); 129 if (!dev->started) 130 return -1; 131 132 if (dev->queue_pairs > 1) { 133 ret = virtio_user_handle_mq(dev, dev->queue_pairs); 134 if (ret != 0) { 135 PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!"); 136 return -1; 137 } 138 } 139 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { 140 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 141 PMD_DRV_LOG(ERR, "interrupt disable failed"); 142 return -1; 143 } 144 rte_intr_callback_unregister(eth_dev->intr_handle, 145 virtio_interrupt_handler, 146 eth_dev); 147 eth_dev->intr_handle->fd = connectfd; 148 rte_intr_callback_register(eth_dev->intr_handle, 149 virtio_interrupt_handler, eth_dev); 150 151 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 152 PMD_DRV_LOG(ERR, "interrupt enable failed"); 153 return -1; 154 } 155 } 156 PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!"); 157 return 0; 158 } 159 160 static void 161 virtio_user_delayed_handler(void *param) 162 { 163 struct virtio_hw *hw = (struct virtio_hw *)param; 164 struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id]; 165 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 166 167 if (rte_intr_disable(eth_dev->intr_handle) < 0) { 168 PMD_DRV_LOG(ERR, "interrupt disable failed"); 169 return; 170 } 171 rte_intr_callback_unregister(eth_dev->intr_handle, 172 virtio_interrupt_handler, eth_dev); 173 if (dev->is_server) { 174 if (dev->vhostfd >= 0) { 175 close(dev->vhostfd); 176 dev->vhostfd = -1; 177 /* Until the featuers are negotiated again, don't assume 178 * the backend supports VHOST_USER_PROTOCOL_F_STATUS 179 */ 180 dev->protocol_features &= 181 ~(1ULL << VHOST_USER_PROTOCOL_F_STATUS); 182 } 183 eth_dev->intr_handle->fd = dev->listenfd; 184 rte_intr_callback_register(eth_dev->intr_handle, 185 virtio_interrupt_handler, eth_dev); 186 if (rte_intr_enable(eth_dev->intr_handle) < 0) { 187 PMD_DRV_LOG(ERR, "interrupt enable failed"); 188 return; 189 } 190 } 191 } 192 193 static void 194 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, 195 void *dst, int length) 196 { 197 int i; 198 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 199 200 if (offset == offsetof(struct virtio_net_config, mac) && 201 length == RTE_ETHER_ADDR_LEN) { 202 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 203 ((uint8_t *)dst)[i] = dev->mac_addr[i]; 204 return; 205 } 206 207 if (offset == offsetof(struct virtio_net_config, status)) { 208 char buf[128]; 209 210 if (dev->vhostfd >= 0) { 211 int r; 212 int flags; 213 214 flags = fcntl(dev->vhostfd, F_GETFL); 215 if (fcntl(dev->vhostfd, F_SETFL, 216 flags | O_NONBLOCK) == -1) { 217 PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag"); 218 return; 219 } 220 r = recv(dev->vhostfd, buf, 128, MSG_PEEK); 221 if (r == 0 || (r < 0 && errno != EAGAIN)) { 222 dev->net_status &= (~VIRTIO_NET_S_LINK_UP); 223 PMD_DRV_LOG(ERR, "virtio-user port %u is down", 224 hw->port_id); 225 226 /* This function could be called in the process 227 * of interrupt handling, callback cannot be 228 * unregistered here, set an alarm to do it. 229 */ 230 rte_eal_alarm_set(1, 231 virtio_user_delayed_handler, 232 (void *)hw); 233 } else { 234 dev->net_status |= VIRTIO_NET_S_LINK_UP; 235 } 236 if (fcntl(dev->vhostfd, F_SETFL, 237 flags & ~O_NONBLOCK) == -1) { 238 PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag"); 239 return; 240 } 241 } else if (dev->is_server) { 242 dev->net_status &= (~VIRTIO_NET_S_LINK_UP); 243 if (virtio_user_server_reconnect(dev) >= 0) 244 dev->net_status |= VIRTIO_NET_S_LINK_UP; 245 } 246 247 *(uint16_t *)dst = dev->net_status; 248 } 249 250 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) 251 *(uint16_t *)dst = dev->max_queue_pairs; 252 } 253 254 static void 255 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, 256 const void *src, int length) 257 { 258 int i; 259 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 260 261 if ((offset == offsetof(struct virtio_net_config, mac)) && 262 (length == RTE_ETHER_ADDR_LEN)) 263 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 264 dev->mac_addr[i] = ((const uint8_t *)src)[i]; 265 else 266 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", 267 offset, length); 268 } 269 270 static void 271 virtio_user_reset(struct virtio_hw *hw) 272 { 273 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 274 275 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 276 virtio_user_stop_device(dev); 277 } 278 279 static void 280 virtio_user_set_status(struct virtio_hw *hw, uint8_t status) 281 { 282 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 283 uint8_t old_status = dev->status; 284 285 if (status & VIRTIO_CONFIG_STATUS_FEATURES_OK && 286 ~old_status & VIRTIO_CONFIG_STATUS_FEATURES_OK) 287 virtio_user_dev_set_features(dev); 288 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 289 virtio_user_start_device(dev); 290 else if (status == VIRTIO_CONFIG_STATUS_RESET) 291 virtio_user_reset(hw); 292 293 virtio_user_dev_set_status(dev, status); 294 } 295 296 static uint8_t 297 virtio_user_get_status(struct virtio_hw *hw) 298 { 299 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 300 301 virtio_user_dev_update_status(dev); 302 303 return dev->status; 304 } 305 306 static uint64_t 307 virtio_user_get_features(struct virtio_hw *hw) 308 { 309 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 310 311 /* unmask feature bits defined in vhost user protocol */ 312 return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; 313 } 314 315 static void 316 virtio_user_set_features(struct virtio_hw *hw, uint64_t features) 317 { 318 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 319 320 dev->features = features & dev->device_features; 321 } 322 323 static int 324 virtio_user_features_ok(struct virtio_hw *hw __rte_unused) 325 { 326 return 0; 327 } 328 329 static uint8_t 330 virtio_user_get_isr(struct virtio_hw *hw __rte_unused) 331 { 332 /* rxq interrupts and config interrupt are separated in virtio-user, 333 * here we only report config change. 334 */ 335 return VIRTIO_ISR_CONFIG; 336 } 337 338 static uint16_t 339 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, 340 uint16_t vec __rte_unused) 341 { 342 return 0; 343 } 344 345 static uint16_t 346 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, 347 struct virtqueue *vq __rte_unused, 348 uint16_t vec) 349 { 350 /* pretend we have done that */ 351 return vec; 352 } 353 354 /* This function is to get the queue size, aka, number of descs, of a specified 355 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the 356 * max supported queues. 357 */ 358 static uint16_t 359 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused) 360 { 361 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 362 363 /* Currently, each queue has same queue size */ 364 return dev->queue_size; 365 } 366 367 static void 368 virtio_user_setup_queue_packed(struct virtqueue *vq, 369 struct virtio_user_dev *dev) 370 { 371 uint16_t queue_idx = vq->vq_queue_index; 372 struct vring_packed *vring; 373 uint64_t desc_addr; 374 uint64_t avail_addr; 375 uint64_t used_addr; 376 uint16_t i; 377 378 vring = &dev->packed_vrings[queue_idx]; 379 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 380 avail_addr = desc_addr + vq->vq_nentries * 381 sizeof(struct vring_packed_desc); 382 used_addr = RTE_ALIGN_CEIL(avail_addr + 383 sizeof(struct vring_packed_desc_event), 384 VIRTIO_VRING_ALIGN); 385 vring->num = vq->vq_nentries; 386 vring->desc = (void *)(uintptr_t)desc_addr; 387 vring->driver = (void *)(uintptr_t)avail_addr; 388 vring->device = (void *)(uintptr_t)used_addr; 389 dev->packed_queues[queue_idx].avail_wrap_counter = true; 390 dev->packed_queues[queue_idx].used_wrap_counter = true; 391 392 for (i = 0; i < vring->num; i++) 393 vring->desc[i].flags = 0; 394 } 395 396 static void 397 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 398 { 399 uint16_t queue_idx = vq->vq_queue_index; 400 uint64_t desc_addr, avail_addr, used_addr; 401 402 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 403 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 404 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 405 ring[vq->vq_nentries]), 406 VIRTIO_VRING_ALIGN); 407 408 dev->vrings[queue_idx].num = vq->vq_nentries; 409 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 410 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 411 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 412 } 413 414 static int 415 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 416 { 417 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 418 419 if (virtio_with_packed_queue(hw)) 420 virtio_user_setup_queue_packed(vq, dev); 421 else 422 virtio_user_setup_queue_split(vq, dev); 423 424 return 0; 425 } 426 427 static void 428 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 429 { 430 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 431 * correspondingly stops the ioeventfds, and reset the status of 432 * the device. 433 * For modern devices, set queue desc, avail, used in PCI bar to 0, 434 * not see any more behavior in QEMU. 435 * 436 * Here we just care about what information to deliver to vhost-user 437 * or vhost-kernel. So we just close ioeventfd for now. 438 */ 439 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 440 441 close(dev->callfds[vq->vq_queue_index]); 442 close(dev->kickfds[vq->vq_queue_index]); 443 } 444 445 static void 446 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 447 { 448 uint64_t buf = 1; 449 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 450 451 if (hw->cvq && (hw->cvq->vq == vq)) { 452 if (virtio_with_packed_queue(vq->hw)) 453 virtio_user_handle_cq_packed(dev, vq->vq_queue_index); 454 else 455 virtio_user_handle_cq(dev, vq->vq_queue_index); 456 return; 457 } 458 459 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 460 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 461 strerror(errno)); 462 } 463 464 static int 465 virtio_user_dev_close(struct virtio_hw *hw) 466 { 467 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 468 469 virtio_user_dev_uninit(dev); 470 471 return 0; 472 } 473 474 const struct virtio_ops virtio_user_ops = { 475 .read_dev_cfg = virtio_user_read_dev_config, 476 .write_dev_cfg = virtio_user_write_dev_config, 477 .get_status = virtio_user_get_status, 478 .set_status = virtio_user_set_status, 479 .get_features = virtio_user_get_features, 480 .set_features = virtio_user_set_features, 481 .features_ok = virtio_user_features_ok, 482 .get_isr = virtio_user_get_isr, 483 .set_config_irq = virtio_user_set_config_irq, 484 .set_queue_irq = virtio_user_set_queue_irq, 485 .get_queue_num = virtio_user_get_queue_num, 486 .setup_queue = virtio_user_setup_queue, 487 .del_queue = virtio_user_del_queue, 488 .notify_queue = virtio_user_notify_queue, 489 .dev_close = virtio_user_dev_close, 490 }; 491 492 static const char *valid_args[] = { 493 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 494 VIRTIO_USER_ARG_QUEUES_NUM, 495 #define VIRTIO_USER_ARG_CQ_NUM "cq" 496 VIRTIO_USER_ARG_CQ_NUM, 497 #define VIRTIO_USER_ARG_MAC "mac" 498 VIRTIO_USER_ARG_MAC, 499 #define VIRTIO_USER_ARG_PATH "path" 500 VIRTIO_USER_ARG_PATH, 501 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 502 VIRTIO_USER_ARG_QUEUE_SIZE, 503 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 504 VIRTIO_USER_ARG_INTERFACE_NAME, 505 #define VIRTIO_USER_ARG_SERVER_MODE "server" 506 VIRTIO_USER_ARG_SERVER_MODE, 507 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 508 VIRTIO_USER_ARG_MRG_RXBUF, 509 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 510 VIRTIO_USER_ARG_IN_ORDER, 511 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 512 VIRTIO_USER_ARG_PACKED_VQ, 513 #define VIRTIO_USER_ARG_SPEED "speed" 514 VIRTIO_USER_ARG_SPEED, 515 #define VIRTIO_USER_ARG_VECTORIZED "vectorized" 516 VIRTIO_USER_ARG_VECTORIZED, 517 NULL 518 }; 519 520 #define VIRTIO_USER_DEF_CQ_EN 0 521 #define VIRTIO_USER_DEF_Q_NUM 1 522 #define VIRTIO_USER_DEF_Q_SZ 256 523 #define VIRTIO_USER_DEF_SERVER_MODE 0 524 525 static int 526 get_string_arg(const char *key __rte_unused, 527 const char *value, void *extra_args) 528 { 529 if (!value || !extra_args) 530 return -EINVAL; 531 532 *(char **)extra_args = strdup(value); 533 534 if (!*(char **)extra_args) 535 return -ENOMEM; 536 537 return 0; 538 } 539 540 static int 541 get_integer_arg(const char *key __rte_unused, 542 const char *value, void *extra_args) 543 { 544 uint64_t integer = 0; 545 if (!value || !extra_args) 546 return -EINVAL; 547 errno = 0; 548 integer = strtoull(value, NULL, 0); 549 /* extra_args keeps default value, it should be replaced 550 * only in case of successful parsing of the 'value' arg 551 */ 552 if (errno == 0) 553 *(uint64_t *)extra_args = integer; 554 return -errno; 555 } 556 557 static uint32_t 558 vdpa_dynamic_major_num(void) 559 { 560 FILE *fp; 561 char *line = NULL; 562 size_t size; 563 char name[11]; 564 bool found = false; 565 uint32_t num; 566 567 fp = fopen("/proc/devices", "r"); 568 if (fp == NULL) { 569 PMD_INIT_LOG(ERR, "Cannot open /proc/devices: %s", 570 strerror(errno)); 571 return UNNAMED_MAJOR; 572 } 573 574 while (getline(&line, &size, fp) > 0) { 575 char *stripped = line + strspn(line, " "); 576 if ((sscanf(stripped, "%u %10s", &num, name) == 2) && 577 (strncmp(name, "vhost-vdpa", 10) == 0)) { 578 found = true; 579 break; 580 } 581 } 582 fclose(fp); 583 return found ? num : UNNAMED_MAJOR; 584 } 585 586 static enum virtio_user_backend_type 587 virtio_user_backend_type(const char *path) 588 { 589 struct stat sb; 590 591 if (stat(path, &sb) == -1) { 592 if (errno == ENOENT) 593 return VIRTIO_USER_BACKEND_VHOST_USER; 594 595 PMD_INIT_LOG(ERR, "Stat fails: %s (%s)\n", path, 596 strerror(errno)); 597 return VIRTIO_USER_BACKEND_UNKNOWN; 598 } 599 600 if (S_ISSOCK(sb.st_mode)) { 601 return VIRTIO_USER_BACKEND_VHOST_USER; 602 } else if (S_ISCHR(sb.st_mode)) { 603 if (major(sb.st_rdev) == MISC_MAJOR) 604 return VIRTIO_USER_BACKEND_VHOST_KERNEL; 605 if (major(sb.st_rdev) == vdpa_dynamic_major_num()) 606 return VIRTIO_USER_BACKEND_VHOST_VDPA; 607 } 608 return VIRTIO_USER_BACKEND_UNKNOWN; 609 } 610 611 static struct rte_eth_dev * 612 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 613 { 614 struct rte_eth_dev *eth_dev; 615 struct rte_eth_dev_data *data; 616 struct virtio_hw *hw; 617 struct virtio_user_dev *dev; 618 619 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*dev)); 620 if (!eth_dev) { 621 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 622 return NULL; 623 } 624 625 data = eth_dev->data; 626 dev = eth_dev->data->dev_private; 627 hw = &dev->hw; 628 629 hw->port_id = data->port_id; 630 dev->port_id = data->port_id; 631 VIRTIO_OPS(hw) = &virtio_user_ops; 632 633 hw->intr_lsc = 1; 634 hw->use_vec_rx = 0; 635 hw->use_vec_tx = 0; 636 hw->use_inorder_rx = 0; 637 hw->use_inorder_tx = 0; 638 639 return eth_dev; 640 } 641 642 static void 643 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 644 { 645 rte_eth_dev_release_port(eth_dev); 646 } 647 648 /* Dev initialization routine. Invoked once for each virtio vdev at 649 * EAL init time, see rte_bus_probe(). 650 * Returns 0 on success. 651 */ 652 static int 653 virtio_user_pmd_probe(struct rte_vdev_device *vdev) 654 { 655 struct rte_kvargs *kvlist = NULL; 656 struct rte_eth_dev *eth_dev; 657 struct virtio_hw *hw; 658 struct virtio_user_dev *dev; 659 enum virtio_user_backend_type backend_type = VIRTIO_USER_BACKEND_UNKNOWN; 660 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 661 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 662 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 663 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 664 uint64_t mrg_rxbuf = 1; 665 uint64_t in_order = 1; 666 uint64_t packed_vq = 0; 667 uint64_t vectorized = 0; 668 char *path = NULL; 669 char *ifname = NULL; 670 char *mac_addr = NULL; 671 int ret = -1; 672 673 RTE_BUILD_BUG_ON(offsetof(struct virtio_user_dev, hw) != 0); 674 675 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 676 const char *name = rte_vdev_device_name(vdev); 677 eth_dev = rte_eth_dev_attach_secondary(name); 678 if (!eth_dev) { 679 PMD_INIT_LOG(ERR, "Failed to probe %s", name); 680 return -1; 681 } 682 683 dev = eth_dev->data->dev_private; 684 hw = &dev->hw; 685 VIRTIO_OPS(hw) = &virtio_user_ops; 686 687 if (eth_virtio_dev_init(eth_dev) < 0) { 688 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 689 rte_eth_dev_release_port(eth_dev); 690 return -1; 691 } 692 693 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops; 694 eth_dev->device = &vdev->device; 695 rte_eth_dev_probing_finish(eth_dev); 696 return 0; 697 } 698 699 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_args); 700 if (!kvlist) { 701 PMD_INIT_LOG(ERR, "error when parsing param"); 702 goto end; 703 } 704 705 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 706 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 707 &get_string_arg, &path) < 0) { 708 PMD_INIT_LOG(ERR, "error to parse %s", 709 VIRTIO_USER_ARG_PATH); 710 goto end; 711 } 712 } else { 713 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 714 VIRTIO_USER_ARG_PATH); 715 goto end; 716 } 717 718 backend_type = virtio_user_backend_type(path); 719 if (backend_type == VIRTIO_USER_BACKEND_UNKNOWN) { 720 PMD_INIT_LOG(ERR, 721 "unable to determine backend type for path %s", 722 path); 723 goto end; 724 } 725 PMD_INIT_LOG(INFO, "Backend type detected: %s", 726 virtio_user_backend_strings[backend_type]); 727 728 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 729 if (backend_type != VIRTIO_USER_BACKEND_VHOST_KERNEL) { 730 PMD_INIT_LOG(ERR, 731 "arg %s applies only to vhost-kernel backend", 732 VIRTIO_USER_ARG_INTERFACE_NAME); 733 goto end; 734 } 735 736 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 737 &get_string_arg, &ifname) < 0) { 738 PMD_INIT_LOG(ERR, "error to parse %s", 739 VIRTIO_USER_ARG_INTERFACE_NAME); 740 goto end; 741 } 742 } 743 744 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 745 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 746 &get_string_arg, &mac_addr) < 0) { 747 PMD_INIT_LOG(ERR, "error to parse %s", 748 VIRTIO_USER_ARG_MAC); 749 goto end; 750 } 751 } 752 753 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 754 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 755 &get_integer_arg, &queue_size) < 0) { 756 PMD_INIT_LOG(ERR, "error to parse %s", 757 VIRTIO_USER_ARG_QUEUE_SIZE); 758 goto end; 759 } 760 } 761 762 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 763 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 764 &get_integer_arg, &queues) < 0) { 765 PMD_INIT_LOG(ERR, "error to parse %s", 766 VIRTIO_USER_ARG_QUEUES_NUM); 767 goto end; 768 } 769 } 770 771 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 772 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 773 &get_integer_arg, &server_mode) < 0) { 774 PMD_INIT_LOG(ERR, "error to parse %s", 775 VIRTIO_USER_ARG_SERVER_MODE); 776 goto end; 777 } 778 } 779 780 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 781 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 782 &get_integer_arg, &cq) < 0) { 783 PMD_INIT_LOG(ERR, "error to parse %s", 784 VIRTIO_USER_ARG_CQ_NUM); 785 goto end; 786 } 787 } else if (queues > 1) { 788 cq = 1; 789 } 790 791 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 792 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 793 &get_integer_arg, &packed_vq) < 0) { 794 PMD_INIT_LOG(ERR, "error to parse %s", 795 VIRTIO_USER_ARG_PACKED_VQ); 796 goto end; 797 } 798 } 799 800 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) { 801 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED, 802 &get_integer_arg, &vectorized) < 0) { 803 PMD_INIT_LOG(ERR, "error to parse %s", 804 VIRTIO_USER_ARG_VECTORIZED); 805 goto end; 806 } 807 } 808 809 if (queues > 1 && cq == 0) { 810 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); 811 goto end; 812 } 813 814 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 815 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 816 VIRTIO_USER_ARG_QUEUES_NUM, queues, 817 VIRTIO_MAX_VIRTQUEUE_PAIRS); 818 goto end; 819 } 820 821 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 822 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 823 &get_integer_arg, &mrg_rxbuf) < 0) { 824 PMD_INIT_LOG(ERR, "error to parse %s", 825 VIRTIO_USER_ARG_MRG_RXBUF); 826 goto end; 827 } 828 } 829 830 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 831 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 832 &get_integer_arg, &in_order) < 0) { 833 PMD_INIT_LOG(ERR, "error to parse %s", 834 VIRTIO_USER_ARG_IN_ORDER); 835 goto end; 836 } 837 } 838 839 eth_dev = virtio_user_eth_dev_alloc(vdev); 840 if (!eth_dev) { 841 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 842 goto end; 843 } 844 845 dev = eth_dev->data->dev_private; 846 hw = &dev->hw; 847 if (virtio_user_dev_init(dev, path, queues, cq, 848 queue_size, mac_addr, &ifname, server_mode, 849 mrg_rxbuf, in_order, packed_vq, backend_type) < 0) { 850 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 851 virtio_user_eth_dev_free(eth_dev); 852 goto end; 853 } 854 855 /* previously called by pci probing for physical dev */ 856 if (eth_virtio_dev_init(eth_dev) < 0) { 857 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 858 virtio_user_eth_dev_free(eth_dev); 859 goto end; 860 } 861 862 if (vectorized) { 863 if (packed_vq) { 864 #if defined(CC_AVX512_SUPPORT) || defined(RTE_ARCH_ARM) 865 hw->use_vec_rx = 1; 866 hw->use_vec_tx = 1; 867 #else 868 PMD_INIT_LOG(INFO, 869 "building environment do not support packed ring vectorized"); 870 #endif 871 } else { 872 hw->use_vec_rx = 1; 873 } 874 } 875 876 rte_eth_dev_probing_finish(eth_dev); 877 ret = 0; 878 879 end: 880 if (kvlist) 881 rte_kvargs_free(kvlist); 882 if (path) 883 free(path); 884 if (mac_addr) 885 free(mac_addr); 886 if (ifname) 887 free(ifname); 888 return ret; 889 } 890 891 static int 892 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 893 { 894 const char *name; 895 struct rte_eth_dev *eth_dev; 896 897 if (!vdev) 898 return -EINVAL; 899 900 name = rte_vdev_device_name(vdev); 901 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 902 eth_dev = rte_eth_dev_allocated(name); 903 /* Port has already been released by close. */ 904 if (!eth_dev) 905 return 0; 906 907 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 908 return rte_eth_dev_release_port(eth_dev); 909 910 /* make sure the device is stopped, queues freed */ 911 return rte_eth_dev_close(eth_dev->data->port_id); 912 } 913 914 static int virtio_user_pmd_dma_map(struct rte_vdev_device *vdev, void *addr, 915 uint64_t iova, size_t len) 916 { 917 const char *name; 918 struct rte_eth_dev *eth_dev; 919 struct virtio_user_dev *dev; 920 921 if (!vdev) 922 return -EINVAL; 923 924 name = rte_vdev_device_name(vdev); 925 eth_dev = rte_eth_dev_allocated(name); 926 /* Port has already been released by close. */ 927 if (!eth_dev) 928 return 0; 929 930 dev = eth_dev->data->dev_private; 931 932 if (dev->ops->dma_map) 933 return dev->ops->dma_map(dev, addr, iova, len); 934 935 return 0; 936 } 937 938 static int virtio_user_pmd_dma_unmap(struct rte_vdev_device *vdev, void *addr, 939 uint64_t iova, size_t len) 940 { 941 const char *name; 942 struct rte_eth_dev *eth_dev; 943 struct virtio_user_dev *dev; 944 945 if (!vdev) 946 return -EINVAL; 947 948 name = rte_vdev_device_name(vdev); 949 eth_dev = rte_eth_dev_allocated(name); 950 /* Port has already been released by close. */ 951 if (!eth_dev) 952 return 0; 953 954 dev = eth_dev->data->dev_private; 955 956 if (dev->ops->dma_unmap) 957 return dev->ops->dma_unmap(dev, addr, iova, len); 958 959 return 0; 960 } 961 962 static struct rte_vdev_driver virtio_user_driver = { 963 .probe = virtio_user_pmd_probe, 964 .remove = virtio_user_pmd_remove, 965 .dma_map = virtio_user_pmd_dma_map, 966 .dma_unmap = virtio_user_pmd_dma_unmap, 967 .drv_flags = RTE_VDEV_DRV_NEED_IOVA_AS_VA, 968 }; 969 970 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 971 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 972 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 973 "path=<path> " 974 "mac=<mac addr> " 975 "cq=<int> " 976 "queue_size=<int> " 977 "queues=<int> " 978 "iface=<string> " 979 "server=<0|1> " 980 "mrg_rxbuf=<0|1> " 981 "in_order=<0|1> " 982 "packed_vq=<0|1> " 983 "speed=<int> " 984 "vectorized=<0|1>"); 985