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