1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <stdlib.h> 7 #include <sys/types.h> 8 #include <unistd.h> 9 #include <fcntl.h> 10 #include <linux/major.h> 11 #include <sys/stat.h> 12 #include <sys/sysmacros.h> 13 #include <sys/socket.h> 14 15 #include <rte_malloc.h> 16 #include <rte_kvargs.h> 17 #include <ethdev_vdev.h> 18 #include <bus_vdev_driver.h> 19 #include <rte_alarm.h> 20 #include <rte_cycles.h> 21 22 #include "virtio_ethdev.h" 23 #include "virtio_logs.h" 24 #include "virtio.h" 25 #include "virtqueue.h" 26 #include "virtio_rxtx.h" 27 #include "virtio_user/virtio_user_dev.h" 28 #include "virtio_user/vhost.h" 29 30 #define virtio_user_get_dev(hwp) container_of(hwp, struct virtio_user_dev, hw) 31 32 static void 33 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset, 34 void *dst, int length) 35 { 36 int i; 37 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 38 39 if (offset == offsetof(struct virtio_net_config, mac) && 40 length == RTE_ETHER_ADDR_LEN) { 41 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 42 ((uint8_t *)dst)[i] = dev->mac_addr[i]; 43 return; 44 } 45 46 if (offset == offsetof(struct virtio_net_config, status)) { 47 virtio_user_dev_update_link_state(dev); 48 49 *(uint16_t *)dst = dev->net_status; 50 } 51 52 if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs)) 53 *(uint16_t *)dst = dev->max_queue_pairs; 54 } 55 56 static void 57 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset, 58 const void *src, int length) 59 { 60 int i; 61 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 62 63 if ((offset == offsetof(struct virtio_net_config, mac)) && 64 (length == RTE_ETHER_ADDR_LEN)) { 65 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i) 66 dev->mac_addr[i] = ((const uint8_t *)src)[i]; 67 virtio_user_dev_set_mac(dev); 68 virtio_user_dev_get_mac(dev); 69 } else { 70 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d", 71 offset, length); 72 } 73 } 74 75 static void 76 virtio_user_reset(struct virtio_hw *hw) 77 { 78 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 79 80 if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK) 81 virtio_user_stop_device(dev); 82 } 83 84 static void 85 virtio_user_set_status(struct virtio_hw *hw, uint8_t status) 86 { 87 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 88 uint8_t old_status = dev->status; 89 90 if (status & VIRTIO_CONFIG_STATUS_FEATURES_OK && 91 ~old_status & VIRTIO_CONFIG_STATUS_FEATURES_OK) 92 virtio_user_dev_set_features(dev); 93 94 if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK) { 95 if (virtio_user_start_device(dev)) { 96 virtio_user_dev_update_status(dev); 97 return; 98 } 99 } else if (status == VIRTIO_CONFIG_STATUS_RESET) { 100 virtio_user_reset(hw); 101 } 102 103 virtio_user_dev_set_status(dev, status); 104 } 105 106 static uint8_t 107 virtio_user_get_status(struct virtio_hw *hw) 108 { 109 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 110 111 virtio_user_dev_update_status(dev); 112 113 return dev->status; 114 } 115 116 static uint64_t 117 virtio_user_get_features(struct virtio_hw *hw) 118 { 119 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 120 121 /* unmask feature bits defined in vhost user protocol */ 122 return (dev->device_features | dev->frontend_features) & 123 VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; 124 } 125 126 static void 127 virtio_user_set_features(struct virtio_hw *hw, uint64_t features) 128 { 129 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 130 131 dev->features = features & (dev->device_features | dev->frontend_features); 132 } 133 134 static int 135 virtio_user_features_ok(struct virtio_hw *hw __rte_unused) 136 { 137 return 0; 138 } 139 140 static uint8_t 141 virtio_user_get_isr(struct virtio_hw *hw __rte_unused) 142 { 143 /* rxq interrupts and config interrupt are separated in virtio-user, 144 * here we only report config change. 145 */ 146 return VIRTIO_ISR_CONFIG; 147 } 148 149 static uint16_t 150 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused, 151 uint16_t vec __rte_unused) 152 { 153 return 0; 154 } 155 156 static uint16_t 157 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused, 158 struct virtqueue *vq __rte_unused, 159 uint16_t vec) 160 { 161 /* pretend we have done that */ 162 return vec; 163 } 164 165 /* This function is to get the queue size, aka, number of descs, of a specified 166 * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the 167 * max supported queues. 168 */ 169 static uint16_t 170 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused) 171 { 172 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 173 174 /* Currently, each queue has same queue size */ 175 return dev->queue_size; 176 } 177 178 static void 179 virtio_user_setup_queue_packed(struct virtqueue *vq, 180 struct virtio_user_dev *dev) 181 { 182 uint16_t queue_idx = vq->vq_queue_index; 183 struct vring_packed *vring; 184 uint64_t desc_addr; 185 uint64_t avail_addr; 186 uint64_t used_addr; 187 uint16_t i; 188 189 vring = &dev->packed_vrings[queue_idx]; 190 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 191 avail_addr = desc_addr + vq->vq_nentries * 192 sizeof(struct vring_packed_desc); 193 used_addr = RTE_ALIGN_CEIL(avail_addr + 194 sizeof(struct vring_packed_desc_event), 195 VIRTIO_VRING_ALIGN); 196 vring->num = vq->vq_nentries; 197 vring->desc = (void *)(uintptr_t)desc_addr; 198 vring->driver = (void *)(uintptr_t)avail_addr; 199 vring->device = (void *)(uintptr_t)used_addr; 200 dev->packed_queues[queue_idx].avail_wrap_counter = true; 201 dev->packed_queues[queue_idx].used_wrap_counter = true; 202 203 for (i = 0; i < vring->num; i++) 204 vring->desc[i].flags = 0; 205 } 206 207 static void 208 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev) 209 { 210 uint16_t queue_idx = vq->vq_queue_index; 211 uint64_t desc_addr, avail_addr, used_addr; 212 213 desc_addr = (uintptr_t)vq->vq_ring_virt_mem; 214 avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc); 215 used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail, 216 ring[vq->vq_nentries]), 217 VIRTIO_VRING_ALIGN); 218 219 dev->vrings[queue_idx].num = vq->vq_nentries; 220 dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr; 221 dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr; 222 dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr; 223 } 224 225 static int 226 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq) 227 { 228 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 229 230 if (virtio_with_packed_queue(hw)) 231 virtio_user_setup_queue_packed(vq, dev); 232 else 233 virtio_user_setup_queue_split(vq, dev); 234 235 if (dev->hw_cvq && hw->cvq && (virtnet_cq_to_vq(hw->cvq) == vq)) 236 return virtio_user_dev_create_shadow_cvq(dev, vq); 237 238 return 0; 239 } 240 241 static void 242 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq) 243 { 244 /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU 245 * correspondingly stops the ioeventfds, and reset the status of 246 * the device. 247 * For modern devices, set queue desc, avail, used in PCI bar to 0, 248 * not see any more behavior in QEMU. 249 * 250 * Here we just care about what information to deliver to vhost-user 251 * or vhost-kernel. So we just close ioeventfd for now. 252 */ 253 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 254 255 close(dev->callfds[vq->vq_queue_index]); 256 close(dev->kickfds[vq->vq_queue_index]); 257 258 if (hw->cvq && (virtnet_cq_to_vq(hw->cvq) == vq)) 259 virtio_user_dev_destroy_shadow_cvq(dev); 260 } 261 262 static void 263 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq) 264 { 265 uint64_t buf = 1; 266 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 267 268 if (hw->cvq && (virtnet_cq_to_vq(hw->cvq) == vq)) { 269 virtio_user_handle_cq(dev, vq->vq_queue_index); 270 271 return; 272 } 273 274 if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0) 275 PMD_DRV_LOG(ERR, "failed to kick backend: %s", 276 strerror(errno)); 277 } 278 279 static int 280 virtio_user_dev_close(struct virtio_hw *hw) 281 { 282 struct virtio_user_dev *dev = virtio_user_get_dev(hw); 283 284 virtio_user_dev_uninit(dev); 285 286 return 0; 287 } 288 289 const struct virtio_ops virtio_user_ops = { 290 .read_dev_cfg = virtio_user_read_dev_config, 291 .write_dev_cfg = virtio_user_write_dev_config, 292 .get_status = virtio_user_get_status, 293 .set_status = virtio_user_set_status, 294 .get_features = virtio_user_get_features, 295 .set_features = virtio_user_set_features, 296 .features_ok = virtio_user_features_ok, 297 .get_isr = virtio_user_get_isr, 298 .set_config_irq = virtio_user_set_config_irq, 299 .set_queue_irq = virtio_user_set_queue_irq, 300 .get_queue_num = virtio_user_get_queue_num, 301 .setup_queue = virtio_user_setup_queue, 302 .del_queue = virtio_user_del_queue, 303 .notify_queue = virtio_user_notify_queue, 304 .dev_close = virtio_user_dev_close, 305 }; 306 307 static const char *valid_args[] = { 308 #define VIRTIO_USER_ARG_QUEUES_NUM "queues" 309 VIRTIO_USER_ARG_QUEUES_NUM, 310 #define VIRTIO_USER_ARG_CQ_NUM "cq" 311 VIRTIO_USER_ARG_CQ_NUM, 312 #define VIRTIO_USER_ARG_MAC "mac" 313 VIRTIO_USER_ARG_MAC, 314 #define VIRTIO_USER_ARG_PATH "path" 315 VIRTIO_USER_ARG_PATH, 316 #define VIRTIO_USER_ARG_QUEUE_SIZE "queue_size" 317 VIRTIO_USER_ARG_QUEUE_SIZE, 318 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface" 319 VIRTIO_USER_ARG_INTERFACE_NAME, 320 #define VIRTIO_USER_ARG_SERVER_MODE "server" 321 VIRTIO_USER_ARG_SERVER_MODE, 322 #define VIRTIO_USER_ARG_MRG_RXBUF "mrg_rxbuf" 323 VIRTIO_USER_ARG_MRG_RXBUF, 324 #define VIRTIO_USER_ARG_IN_ORDER "in_order" 325 VIRTIO_USER_ARG_IN_ORDER, 326 #define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" 327 VIRTIO_USER_ARG_PACKED_VQ, 328 #define VIRTIO_USER_ARG_SPEED "speed" 329 VIRTIO_USER_ARG_SPEED, 330 #define VIRTIO_USER_ARG_VECTORIZED "vectorized" 331 VIRTIO_USER_ARG_VECTORIZED, 332 NULL 333 }; 334 335 #define VIRTIO_USER_DEF_CQ_EN 0 336 #define VIRTIO_USER_DEF_Q_NUM 1 337 #define VIRTIO_USER_DEF_Q_SZ 256 338 #define VIRTIO_USER_DEF_SERVER_MODE 0 339 340 static int 341 get_string_arg(const char *key __rte_unused, 342 const char *value, void *extra_args) 343 { 344 if (!value || !extra_args) 345 return -EINVAL; 346 347 *(char **)extra_args = strdup(value); 348 349 if (!*(char **)extra_args) 350 return -ENOMEM; 351 352 return 0; 353 } 354 355 static int 356 get_integer_arg(const char *key __rte_unused, 357 const char *value, void *extra_args) 358 { 359 uint64_t integer = 0; 360 if (!value || !extra_args) 361 return -EINVAL; 362 errno = 0; 363 integer = strtoull(value, NULL, 0); 364 /* extra_args keeps default value, it should be replaced 365 * only in case of successful parsing of the 'value' arg 366 */ 367 if (errno == 0) 368 *(uint64_t *)extra_args = integer; 369 return -errno; 370 } 371 372 static uint32_t 373 vdpa_dynamic_major_num(void) 374 { 375 FILE *fp; 376 char *line = NULL; 377 size_t size = 0; 378 char name[11]; 379 bool found = false; 380 uint32_t num; 381 382 fp = fopen("/proc/devices", "r"); 383 if (fp == NULL) { 384 PMD_INIT_LOG(ERR, "Cannot open /proc/devices: %s", 385 strerror(errno)); 386 return UNNAMED_MAJOR; 387 } 388 389 while (getline(&line, &size, fp) > 0) { 390 char *stripped = line + strspn(line, " "); 391 if ((sscanf(stripped, "%u %10s", &num, name) == 2) && 392 (strncmp(name, "vhost-vdpa", 10) == 0)) { 393 found = true; 394 break; 395 } 396 } 397 free(line); 398 fclose(fp); 399 return found ? num : UNNAMED_MAJOR; 400 } 401 402 static enum virtio_user_backend_type 403 virtio_user_backend_type(const char *path) 404 { 405 struct stat sb; 406 407 if (stat(path, &sb) == -1) { 408 if (errno == ENOENT) 409 return VIRTIO_USER_BACKEND_VHOST_USER; 410 411 PMD_INIT_LOG(ERR, "Stat fails: %s (%s)", path, 412 strerror(errno)); 413 return VIRTIO_USER_BACKEND_UNKNOWN; 414 } 415 416 if (S_ISSOCK(sb.st_mode)) { 417 return VIRTIO_USER_BACKEND_VHOST_USER; 418 } else if (S_ISCHR(sb.st_mode)) { 419 if (major(sb.st_rdev) == MISC_MAJOR) 420 return VIRTIO_USER_BACKEND_VHOST_KERNEL; 421 if (major(sb.st_rdev) == vdpa_dynamic_major_num()) 422 return VIRTIO_USER_BACKEND_VHOST_VDPA; 423 } 424 return VIRTIO_USER_BACKEND_UNKNOWN; 425 } 426 427 static struct rte_eth_dev * 428 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) 429 { 430 struct rte_eth_dev *eth_dev; 431 struct rte_eth_dev_data *data; 432 struct virtio_hw *hw; 433 struct virtio_user_dev *dev; 434 435 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*dev)); 436 if (!eth_dev) { 437 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev"); 438 return NULL; 439 } 440 441 data = eth_dev->data; 442 dev = eth_dev->data->dev_private; 443 hw = &dev->hw; 444 445 hw->port_id = data->port_id; 446 VIRTIO_OPS(hw) = &virtio_user_ops; 447 448 hw->intr_lsc = 1; 449 hw->use_vec_rx = 0; 450 hw->use_vec_tx = 0; 451 hw->use_inorder_rx = 0; 452 hw->use_inorder_tx = 0; 453 454 return eth_dev; 455 } 456 457 static void 458 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev) 459 { 460 rte_eth_dev_release_port(eth_dev); 461 } 462 463 /* Dev initialization routine. Invoked once for each virtio vdev at 464 * EAL init time, see rte_bus_probe(). 465 * Returns 0 on success. 466 */ 467 static int 468 virtio_user_pmd_probe(struct rte_vdev_device *vdev) 469 { 470 struct rte_kvargs *kvlist = NULL; 471 struct rte_eth_dev *eth_dev; 472 struct virtio_hw *hw; 473 struct virtio_user_dev *dev; 474 enum virtio_user_backend_type backend_type = VIRTIO_USER_BACKEND_UNKNOWN; 475 uint64_t queues = VIRTIO_USER_DEF_Q_NUM; 476 uint64_t cq = VIRTIO_USER_DEF_CQ_EN; 477 uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ; 478 uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE; 479 uint64_t mrg_rxbuf = 1; 480 uint64_t in_order = 1; 481 uint64_t packed_vq = 0; 482 uint64_t vectorized = 0; 483 char *path = NULL; 484 char *ifname = NULL; 485 char *mac_addr = NULL; 486 int ret = -1; 487 488 RTE_BUILD_BUG_ON(offsetof(struct virtio_user_dev, hw) != 0); 489 490 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 491 const char *name = rte_vdev_device_name(vdev); 492 eth_dev = rte_eth_dev_attach_secondary(name); 493 if (!eth_dev) { 494 PMD_INIT_LOG(ERR, "Failed to probe %s", name); 495 return -1; 496 } 497 498 dev = eth_dev->data->dev_private; 499 hw = &dev->hw; 500 VIRTIO_OPS(hw) = &virtio_user_ops; 501 502 if (eth_virtio_dev_init(eth_dev) < 0) { 503 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 504 rte_eth_dev_release_port(eth_dev); 505 return -1; 506 } 507 508 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops; 509 eth_dev->device = &vdev->device; 510 rte_eth_dev_probing_finish(eth_dev); 511 return 0; 512 } 513 514 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_args); 515 if (!kvlist) { 516 PMD_INIT_LOG(ERR, "error when parsing param"); 517 goto end; 518 } 519 520 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) { 521 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH, 522 &get_string_arg, &path) < 0) { 523 PMD_INIT_LOG(ERR, "error to parse %s", 524 VIRTIO_USER_ARG_PATH); 525 goto end; 526 } 527 } else { 528 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user", 529 VIRTIO_USER_ARG_PATH); 530 goto end; 531 } 532 533 backend_type = virtio_user_backend_type(path); 534 if (backend_type == VIRTIO_USER_BACKEND_UNKNOWN) { 535 PMD_INIT_LOG(ERR, 536 "unable to determine backend type for path %s", 537 path); 538 goto end; 539 } 540 PMD_INIT_LOG(INFO, "Backend type detected: %s", 541 virtio_user_backend_strings[backend_type]); 542 543 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) { 544 if (backend_type != VIRTIO_USER_BACKEND_VHOST_KERNEL) { 545 PMD_INIT_LOG(ERR, 546 "arg %s applies only to vhost-kernel backend", 547 VIRTIO_USER_ARG_INTERFACE_NAME); 548 goto end; 549 } 550 551 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME, 552 &get_string_arg, &ifname) < 0) { 553 PMD_INIT_LOG(ERR, "error to parse %s", 554 VIRTIO_USER_ARG_INTERFACE_NAME); 555 goto end; 556 } 557 } 558 559 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) { 560 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC, 561 &get_string_arg, &mac_addr) < 0) { 562 PMD_INIT_LOG(ERR, "error to parse %s", 563 VIRTIO_USER_ARG_MAC); 564 goto end; 565 } 566 } 567 568 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) { 569 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE, 570 &get_integer_arg, &queue_size) < 0) { 571 PMD_INIT_LOG(ERR, "error to parse %s", 572 VIRTIO_USER_ARG_QUEUE_SIZE); 573 goto end; 574 } 575 } 576 577 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) { 578 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM, 579 &get_integer_arg, &queues) < 0) { 580 PMD_INIT_LOG(ERR, "error to parse %s", 581 VIRTIO_USER_ARG_QUEUES_NUM); 582 goto end; 583 } 584 } 585 586 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) { 587 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE, 588 &get_integer_arg, &server_mode) < 0) { 589 PMD_INIT_LOG(ERR, "error to parse %s", 590 VIRTIO_USER_ARG_SERVER_MODE); 591 goto end; 592 } 593 } 594 595 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) { 596 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM, 597 &get_integer_arg, &cq) < 0) { 598 PMD_INIT_LOG(ERR, "error to parse %s", 599 VIRTIO_USER_ARG_CQ_NUM); 600 goto end; 601 } 602 } 603 604 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { 605 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, 606 &get_integer_arg, &packed_vq) < 0) { 607 PMD_INIT_LOG(ERR, "error to parse %s", 608 VIRTIO_USER_ARG_PACKED_VQ); 609 goto end; 610 } 611 } 612 613 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) { 614 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED, 615 &get_integer_arg, &vectorized) < 0) { 616 PMD_INIT_LOG(ERR, "error to parse %s", 617 VIRTIO_USER_ARG_VECTORIZED); 618 goto end; 619 } 620 } 621 622 if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) { 623 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u", 624 VIRTIO_USER_ARG_QUEUES_NUM, queues, 625 VIRTIO_MAX_VIRTQUEUE_PAIRS); 626 goto end; 627 } 628 629 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) { 630 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF, 631 &get_integer_arg, &mrg_rxbuf) < 0) { 632 PMD_INIT_LOG(ERR, "error to parse %s", 633 VIRTIO_USER_ARG_MRG_RXBUF); 634 goto end; 635 } 636 } 637 638 if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) { 639 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER, 640 &get_integer_arg, &in_order) < 0) { 641 PMD_INIT_LOG(ERR, "error to parse %s", 642 VIRTIO_USER_ARG_IN_ORDER); 643 goto end; 644 } 645 } 646 647 eth_dev = virtio_user_eth_dev_alloc(vdev); 648 if (!eth_dev) { 649 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device"); 650 goto end; 651 } 652 653 dev = eth_dev->data->dev_private; 654 hw = &dev->hw; 655 if (virtio_user_dev_init(dev, path, (uint16_t)queues, cq, 656 queue_size, mac_addr, &ifname, server_mode, 657 mrg_rxbuf, in_order, packed_vq, backend_type) < 0) { 658 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); 659 virtio_user_eth_dev_free(eth_dev); 660 goto end; 661 } 662 663 /* 664 * Virtio-user requires using virtual addresses for the descriptors 665 * buffers, whatever other devices require 666 */ 667 hw->use_va = true; 668 669 /* previously called by pci probing for physical dev */ 670 if (eth_virtio_dev_init(eth_dev) < 0) { 671 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails"); 672 virtio_user_dev_uninit(dev); 673 virtio_user_eth_dev_free(eth_dev); 674 goto end; 675 } 676 677 if (vectorized) { 678 if (packed_vq) { 679 #if defined(CC_AVX512_SUPPORT) || defined(RTE_ARCH_ARM) 680 hw->use_vec_rx = 1; 681 hw->use_vec_tx = 1; 682 #else 683 PMD_INIT_LOG(INFO, 684 "building environment do not support packed ring vectorized"); 685 #endif 686 } else { 687 hw->use_vec_rx = 1; 688 } 689 } 690 691 rte_eth_dev_probing_finish(eth_dev); 692 ret = 0; 693 694 end: 695 rte_kvargs_free(kvlist); 696 free(path); 697 free(mac_addr); 698 free(ifname); 699 return ret; 700 } 701 702 static int 703 virtio_user_pmd_remove(struct rte_vdev_device *vdev) 704 { 705 const char *name; 706 struct rte_eth_dev *eth_dev; 707 708 if (!vdev) 709 return -EINVAL; 710 711 name = rte_vdev_device_name(vdev); 712 PMD_DRV_LOG(INFO, "Un-Initializing %s", name); 713 eth_dev = rte_eth_dev_allocated(name); 714 /* Port has already been released by close. */ 715 if (!eth_dev) 716 return 0; 717 718 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 719 return rte_eth_dev_release_port(eth_dev); 720 721 /* make sure the device is stopped, queues freed */ 722 return rte_eth_dev_close(eth_dev->data->port_id); 723 } 724 725 static int virtio_user_pmd_dma_map(struct rte_vdev_device *vdev, void *addr, 726 uint64_t iova, size_t len) 727 { 728 const char *name; 729 struct rte_eth_dev *eth_dev; 730 struct virtio_user_dev *dev; 731 732 if (!vdev) 733 return -EINVAL; 734 735 name = rte_vdev_device_name(vdev); 736 eth_dev = rte_eth_dev_allocated(name); 737 /* Port has already been released by close. */ 738 if (!eth_dev) 739 return 0; 740 741 dev = eth_dev->data->dev_private; 742 743 if (dev->ops->dma_map) 744 return dev->ops->dma_map(dev, addr, iova, len); 745 746 return 0; 747 } 748 749 static int virtio_user_pmd_dma_unmap(struct rte_vdev_device *vdev, void *addr, 750 uint64_t iova, size_t len) 751 { 752 const char *name; 753 struct rte_eth_dev *eth_dev; 754 struct virtio_user_dev *dev; 755 756 if (!vdev) 757 return -EINVAL; 758 759 name = rte_vdev_device_name(vdev); 760 eth_dev = rte_eth_dev_allocated(name); 761 /* Port has already been released by close. */ 762 if (!eth_dev) 763 return 0; 764 765 dev = eth_dev->data->dev_private; 766 767 if (dev->ops->dma_unmap) 768 return dev->ops->dma_unmap(dev, addr, iova, len); 769 770 return 0; 771 } 772 773 static struct rte_vdev_driver virtio_user_driver = { 774 .probe = virtio_user_pmd_probe, 775 .remove = virtio_user_pmd_remove, 776 .dma_map = virtio_user_pmd_dma_map, 777 .dma_unmap = virtio_user_pmd_dma_unmap, 778 }; 779 780 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver); 781 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user); 782 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user, 783 "path=<path> " 784 "mac=<mac addr> " 785 "cq=<int> " 786 "queue_size=<int> " 787 "queues=<int> " 788 "iface=<string> " 789 "server=<0|1> " 790 "mrg_rxbuf=<0|1> " 791 "in_order=<0|1> " 792 "packed_vq=<0|1> " 793 "speed=<int> " 794 "vectorized=<0|1>"); 795