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