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