drivers/vdpa/ifc/ifcvf_vdpa.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation
   3  */
   4
   5 #include <unistd.h>
   6 #include <pthread.h>
   7 #include <fcntl.h>
   8 #include <string.h>
   9 #include <sys/ioctl.h>
  10 #include <sys/epoll.h>
  11 #include <linux/virtio_net.h>
  12 #include <stdbool.h>
  13
  14 #include <rte_eal_paging.h>
  15 #include <rte_malloc.h>
  16 #include <rte_memory.h>
  17 #include <rte_bus_pci.h>
  18 #include <rte_vhost.h>
  19 #include <rte_vdpa.h>
  20 #include <rte_vdpa_dev.h>
  21 #include <rte_vfio.h>
  22 #include <rte_spinlock.h>
  23 #include <rte_log.h>
  24 #include <rte_kvargs.h>
  25 #include <rte_devargs.h>
  26
  27 #include "base/ifcvf.h"
  28
  29 RTE_LOG_REGISTER(ifcvf_vdpa_logtype, pmd.vdpa.ifcvf, NOTICE);
  30 #define DRV_LOG(level, fmt, args...) \
  31         rte_log(RTE_LOG_ ## level, ifcvf_vdpa_logtype, \
  32                 "IFCVF %s(): " fmt "\n", __func__, ##args)
  33
  34 #define IFCVF_USED_RING_LEN(size) \
  35         ((size) * sizeof(struct vring_used_elem) + sizeof(uint16_t) * 3)
  36
  37 #define IFCVF_VDPA_MODE         "vdpa"
  38 #define IFCVF_SW_FALLBACK_LM    "sw-live-migration"
  39
  40 #define THREAD_NAME_LEN 16
  41
  42 static const char * const ifcvf_valid_arguments[] = {
  43         IFCVF_VDPA_MODE,
  44         IFCVF_SW_FALLBACK_LM,
  45         NULL
  46 };
  47
  48 struct ifcvf_internal {
  49         struct rte_pci_device *pdev;
  50         struct ifcvf_hw hw;
  51         int configured;
  52         int vfio_container_fd;
  53         int vfio_group_fd;
  54         int vfio_dev_fd;
  55         pthread_t tid;  /* thread for notify relay */
  56         int epfd;
  57         int vid;
  58         struct rte_vdpa_device *vdev;
  59         uint16_t max_queues;
  60         uint64_t features;
  61         rte_atomic32_t started;
  62         rte_atomic32_t dev_attached;
  63         rte_atomic32_t running;
  64         rte_spinlock_t lock;
  65         bool sw_lm;
  66         bool sw_fallback_running;
  67         /* mediated vring for sw fallback */
  68         struct vring m_vring[IFCVF_MAX_QUEUES * 2];
  69         /* eventfd for used ring interrupt */
  70         int intr_fd[IFCVF_MAX_QUEUES * 2];
  71 };
  72
  73 struct internal_list {
  74         TAILQ_ENTRY(internal_list) next;
  75         struct ifcvf_internal *internal;
  76 };
  77
  78 TAILQ_HEAD(internal_list_head, internal_list);
  79 static struct internal_list_head internal_list =
  80         TAILQ_HEAD_INITIALIZER(internal_list);
  81
  82 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
  83
  84 static void update_used_ring(struct ifcvf_internal *internal, uint16_t qid);
  85
  86 static struct internal_list *
  87 find_internal_resource_by_vdev(struct rte_vdpa_device *vdev)
  88 {
  89         int found = 0;
  90         struct internal_list *list;
  91
  92         pthread_mutex_lock(&internal_list_lock);
  93
  94         TAILQ_FOREACH(list, &internal_list, next) {
  95                 if (vdev == list->internal->vdev) {
  96                         found = 1;
  97                         break;
  98                 }
  99         }
 100
 101         pthread_mutex_unlock(&internal_list_lock);
 102
 103         if (!found)
 104                 return NULL;
 105
 106         return list;
 107 }
 108
 109 static struct internal_list *
 110 find_internal_resource_by_dev(struct rte_pci_device *pdev)
 111 {
 112         int found = 0;
 113         struct internal_list *list;
 114
 115         pthread_mutex_lock(&internal_list_lock);
 116
 117         TAILQ_FOREACH(list, &internal_list, next) {
 118                 if (!rte_pci_addr_cmp(&pdev->addr,
 119                                         &list->internal->pdev->addr)) {
 120                         found = 1;
 121                         break;
 122                 }
 123         }
 124
 125         pthread_mutex_unlock(&internal_list_lock);
 126
 127         if (!found)
 128                 return NULL;
 129
 130         return list;
 131 }
 132
 133 static int
 134 ifcvf_vfio_setup(struct ifcvf_internal *internal)
 135 {
 136         struct rte_pci_device *dev = internal->pdev;
 137         char devname[RTE_DEV_NAME_MAX_LEN] = {0};
 138         int iommu_group_num;
 139         int i, ret;
 140
 141         internal->vfio_dev_fd = -1;
 142         internal->vfio_group_fd = -1;
 143         internal->vfio_container_fd = -1;
 144
 145         rte_pci_device_name(&dev->addr, devname, RTE_DEV_NAME_MAX_LEN);
 146         ret = rte_vfio_get_group_num(rte_pci_get_sysfs_path(), devname,
 147                         &iommu_group_num);
 148         if (ret <= 0) {
 149                 DRV_LOG(ERR, "%s failed to get IOMMU group", devname);
 150                 return -1;
 151         }
 152
 153         internal->vfio_container_fd = rte_vfio_container_create();
 154         if (internal->vfio_container_fd < 0)
 155                 return -1;
 156
 157         internal->vfio_group_fd = rte_vfio_container_group_bind(
 158                         internal->vfio_container_fd, iommu_group_num);
 159         if (internal->vfio_group_fd < 0)
 160                 goto err;
 161
 162         if (rte_pci_map_device(dev))
 163                 goto err;
 164
 165         internal->vfio_dev_fd = dev->intr_handle.vfio_dev_fd;
 166
 167         for (i = 0; i < RTE_MIN(PCI_MAX_RESOURCE, IFCVF_PCI_MAX_RESOURCE);
 168                         i++) {
 169                 internal->hw.mem_resource[i].addr =
 170                         internal->pdev->mem_resource[i].addr;
 171                 internal->hw.mem_resource[i].phys_addr =
 172                         internal->pdev->mem_resource[i].phys_addr;
 173                 internal->hw.mem_resource[i].len =
 174                         internal->pdev->mem_resource[i].len;
 175         }
 176
 177         return 0;
 178
 179 err:
 180         rte_vfio_container_destroy(internal->vfio_container_fd);
 181         return -1;
 182 }
 183
 184 static int
 185 ifcvf_dma_map(struct ifcvf_internal *internal, int do_map)
 186 {
 187         uint32_t i;
 188         int ret;
 189         struct rte_vhost_memory *mem = NULL;
 190         int vfio_container_fd;
 191
 192         ret = rte_vhost_get_mem_table(internal->vid, &mem);
 193         if (ret < 0) {
 194                 DRV_LOG(ERR, "failed to get VM memory layout.");
 195                 goto exit;
 196         }
 197
 198         vfio_container_fd = internal->vfio_container_fd;
 199
 200         for (i = 0; i < mem->nregions; i++) {
 201                 struct rte_vhost_mem_region *reg;
 202
 203                 reg = &mem->regions[i];
 204                 DRV_LOG(INFO, "%s, region %u: HVA 0x%" PRIx64 ", "
 205                         "GPA 0x%" PRIx64 ", size 0x%" PRIx64 ".",
 206                         do_map ? "DMA map" : "DMA unmap", i,
 207                         reg->host_user_addr, reg->guest_phys_addr, reg->size);
 208
 209                 if (do_map) {
 210                         ret = rte_vfio_container_dma_map(vfio_container_fd,
 211                                 reg->host_user_addr, reg->guest_phys_addr,
 212                                 reg->size);
 213                         if (ret < 0) {
 214                                 DRV_LOG(ERR, "DMA map failed.");
 215                                 goto exit;
 216                         }
 217                 } else {
 218                         ret = rte_vfio_container_dma_unmap(vfio_container_fd,
 219                                 reg->host_user_addr, reg->guest_phys_addr,
 220                                 reg->size);
 221                         if (ret < 0) {
 222                                 DRV_LOG(ERR, "DMA unmap failed.");
 223                                 goto exit;
 224                         }
 225                 }
 226         }
 227
 228 exit:
 229         if (mem)
 230                 free(mem);
 231         return ret;
 232 }
 233
 234 static uint64_t
 235 hva_to_gpa(int vid, uint64_t hva)
 236 {
 237         struct rte_vhost_memory *mem = NULL;
 238         struct rte_vhost_mem_region *reg;
 239         uint32_t i;
 240         uint64_t gpa = 0;
 241
 242         if (rte_vhost_get_mem_table(vid, &mem) < 0)
 243                 goto exit;
 244
 245         for (i = 0; i < mem->nregions; i++) {
 246                 reg = &mem->regions[i];
 247
 248                 if (hva >= reg->host_user_addr &&
 249                                 hva < reg->host_user_addr + reg->size) {
 250                         gpa = hva - reg->host_user_addr + reg->guest_phys_addr;
 251                         break;
 252                 }
 253         }
 254
 255 exit:
 256         if (mem)
 257                 free(mem);
 258         return gpa;
 259 }
 260
 261 static int
 262 vdpa_ifcvf_start(struct ifcvf_internal *internal)
 263 {
 264         struct ifcvf_hw *hw = &internal->hw;
 265         int i, nr_vring;
 266         int vid;
 267         struct rte_vhost_vring vq;
 268         uint64_t gpa;
 269
 270         vid = internal->vid;
 271         nr_vring = rte_vhost_get_vring_num(vid);
 272         rte_vhost_get_negotiated_features(vid, &hw->req_features);
 273
 274         for (i = 0; i < nr_vring; i++) {
 275                 rte_vhost_get_vhost_vring(vid, i, &vq);
 276                 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
 277                 if (gpa == 0) {
 278                         DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
 279                         return -1;
 280                 }
 281                 hw->vring[i].desc = gpa;
 282
 283                 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
 284                 if (gpa == 0) {
 285                         DRV_LOG(ERR, "Fail to get GPA for available ring.");
 286                         return -1;
 287                 }
 288                 hw->vring[i].avail = gpa;
 289
 290                 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
 291                 if (gpa == 0) {
 292                         DRV_LOG(ERR, "Fail to get GPA for used ring.");
 293                         return -1;
 294                 }
 295                 hw->vring[i].used = gpa;
 296
 297                 hw->vring[i].size = vq.size;
 298                 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
 299                                 &hw->vring[i].last_used_idx);
 300         }
 301         hw->nr_vring = i;
 302
 303         return ifcvf_start_hw(&internal->hw);
 304 }
 305
 306 static void
 307 vdpa_ifcvf_stop(struct ifcvf_internal *internal)
 308 {
 309         struct ifcvf_hw *hw = &internal->hw;
 310         uint32_t i;
 311         int vid;
 312         uint64_t features = 0;
 313         uint64_t log_base = 0, log_size = 0;
 314         uint64_t len;
 315
 316         vid = internal->vid;
 317         ifcvf_stop_hw(hw);
 318
 319         for (i = 0; i < hw->nr_vring; i++)
 320                 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
 321                                 hw->vring[i].last_used_idx);
 322
 323         if (internal->sw_lm)
 324                 return;
 325
 326         rte_vhost_get_negotiated_features(vid, &features);
 327         if (RTE_VHOST_NEED_LOG(features)) {
 328                 ifcvf_disable_logging(hw);
 329                 rte_vhost_get_log_base(internal->vid, &log_base, &log_size);
 330                 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
 331                                 log_base, IFCVF_LOG_BASE, log_size);
 332                 /*
 333                  * IFCVF marks dirty memory pages for only packet buffer,
 334                  * SW helps to mark the used ring as dirty after device stops.
 335                  */
 336                 for (i = 0; i < hw->nr_vring; i++) {
 337                         len = IFCVF_USED_RING_LEN(hw->vring[i].size);
 338                         rte_vhost_log_used_vring(vid, i, 0, len);
 339                 }
 340         }
 341 }
 342
 343 #define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
 344                 sizeof(int) * (IFCVF_MAX_QUEUES * 2 + 1))
 345 static int
 346 vdpa_enable_vfio_intr(struct ifcvf_internal *internal, bool m_rx)
 347 {
 348         int ret;
 349         uint32_t i, nr_vring;
 350         char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
 351         struct vfio_irq_set *irq_set;
 352         int *fd_ptr;
 353         struct rte_vhost_vring vring;
 354         int fd;
 355
 356         vring.callfd = -1;
 357
 358         nr_vring = rte_vhost_get_vring_num(internal->vid);
 359
 360         irq_set = (struct vfio_irq_set *)irq_set_buf;
 361         irq_set->argsz = sizeof(irq_set_buf);
 362         irq_set->count = nr_vring + 1;
 363         irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
 364                          VFIO_IRQ_SET_ACTION_TRIGGER;
 365         irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
 366         irq_set->start = 0;
 367         fd_ptr = (int *)&irq_set->data;
 368         fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] = internal->pdev->intr_handle.fd;
 369
 370         for (i = 0; i < nr_vring; i++)
 371                 internal->intr_fd[i] = -1;
 372
 373         for (i = 0; i < nr_vring; i++) {
 374                 rte_vhost_get_vhost_vring(internal->vid, i, &vring);
 375                 fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
 376                 if ((i & 1) == 0 && m_rx == true) {
 377                         fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
 378                         if (fd < 0) {
 379                                 DRV_LOG(ERR, "can't setup eventfd: %s",
 380                                         strerror(errno));
 381                                 return -1;
 382                         }
 383                         internal->intr_fd[i] = fd;
 384                         fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = fd;
 385                 }
 386         }
 387
 388         ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
 389         if (ret) {
 390                 DRV_LOG(ERR, "Error enabling MSI-X interrupts: %s",
 391                                 strerror(errno));
 392                 return -1;
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int
 399 vdpa_disable_vfio_intr(struct ifcvf_internal *internal)
 400 {
 401         int ret;
 402         uint32_t i, nr_vring;
 403         char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
 404         struct vfio_irq_set *irq_set;
 405
 406         irq_set = (struct vfio_irq_set *)irq_set_buf;
 407         irq_set->argsz = sizeof(irq_set_buf);
 408         irq_set->count = 0;
 409         irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
 410         irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
 411         irq_set->start = 0;
 412
 413         nr_vring = rte_vhost_get_vring_num(internal->vid);
 414         for (i = 0; i < nr_vring; i++) {
 415                 if (internal->intr_fd[i] >= 0)
 416                         close(internal->intr_fd[i]);
 417                 internal->intr_fd[i] = -1;
 418         }
 419
 420         ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
 421         if (ret) {
 422                 DRV_LOG(ERR, "Error disabling MSI-X interrupts: %s",
 423                                 strerror(errno));
 424                 return -1;
 425         }
 426
 427         return 0;
 428 }
 429
 430 static void *
 431 notify_relay(void *arg)
 432 {
 433         int i, kickfd, epfd, nfds = 0;
 434         uint32_t qid, q_num;
 435         struct epoll_event events[IFCVF_MAX_QUEUES * 2];
 436         struct epoll_event ev;
 437         uint64_t buf;
 438         int nbytes;
 439         struct rte_vhost_vring vring;
 440         struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
 441         struct ifcvf_hw *hw = &internal->hw;
 442
 443         q_num = rte_vhost_get_vring_num(internal->vid);
 444
 445         epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
 446         if (epfd < 0) {
 447                 DRV_LOG(ERR, "failed to create epoll instance.");
 448                 return NULL;
 449         }
 450         internal->epfd = epfd;
 451
 452         vring.kickfd = -1;
 453         for (qid = 0; qid < q_num; qid++) {
 454                 ev.events = EPOLLIN | EPOLLPRI;
 455                 rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
 456                 ev.data.u64 = qid | (uint64_t)vring.kickfd << 32;
 457                 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
 458                         DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
 459                         return NULL;
 460                 }
 461         }
 462
 463         for (;;) {
 464                 nfds = epoll_wait(epfd, events, q_num, -1);
 465                 if (nfds < 0) {
 466                         if (errno == EINTR)
 467                                 continue;
 468                         DRV_LOG(ERR, "epoll_wait return fail\n");
 469                         return NULL;
 470                 }
 471
 472                 for (i = 0; i < nfds; i++) {
 473                         qid = events[i].data.u32;
 474                         kickfd = (uint32_t)(events[i].data.u64 >> 32);
 475                         do {
 476                                 nbytes = read(kickfd, &buf, 8);
 477                                 if (nbytes < 0) {
 478                                         if (errno == EINTR ||
 479                                             errno == EWOULDBLOCK ||
 480                                             errno == EAGAIN)
 481                                                 continue;
 482                                         DRV_LOG(INFO, "Error reading "
 483                                                 "kickfd: %s",
 484                                                 strerror(errno));
 485                                 }
 486                                 break;
 487                         } while (1);
 488
 489                         ifcvf_notify_queue(hw, qid);
 490                 }
 491         }
 492
 493         return NULL;
 494 }
 495
 496 static int
 497 setup_notify_relay(struct ifcvf_internal *internal)
 498 {
 499         char name[THREAD_NAME_LEN];
 500         int ret;
 501
 502         snprintf(name, sizeof(name), "ifc-notify-%d", internal->vid);
 503         ret = rte_ctrl_thread_create(&internal->tid, name, NULL, notify_relay,
 504                                      (void *)internal);
 505         if (ret != 0) {
 506                 DRV_LOG(ERR, "failed to create notify relay pthread.");
 507                 return -1;
 508         }
 509
 510         return 0;
 511 }
 512
 513 static int
 514 unset_notify_relay(struct ifcvf_internal *internal)
 515 {
 516         void *status;
 517
 518         if (internal->tid) {
 519                 pthread_cancel(internal->tid);
 520                 pthread_join(internal->tid, &status);
 521         }
 522         internal->tid = 0;
 523
 524         if (internal->epfd >= 0)
 525                 close(internal->epfd);
 526         internal->epfd = -1;
 527
 528         return 0;
 529 }
 530
 531 static int
 532 update_datapath(struct ifcvf_internal *internal)
 533 {
 534         int ret;
 535
 536         rte_spinlock_lock(&internal->lock);
 537
 538         if (!rte_atomic32_read(&internal->running) &&
 539             (rte_atomic32_read(&internal->started) &&
 540              rte_atomic32_read(&internal->dev_attached))) {
 541                 ret = ifcvf_dma_map(internal, 1);
 542                 if (ret)
 543                         goto err;
 544
 545                 ret = vdpa_enable_vfio_intr(internal, 0);
 546                 if (ret)
 547                         goto err;
 548
 549                 ret = vdpa_ifcvf_start(internal);
 550                 if (ret)
 551                         goto err;
 552
 553                 ret = setup_notify_relay(internal);
 554                 if (ret)
 555                         goto err;
 556
 557                 rte_atomic32_set(&internal->running, 1);
 558         } else if (rte_atomic32_read(&internal->running) &&
 559                    (!rte_atomic32_read(&internal->started) ||
 560                     !rte_atomic32_read(&internal->dev_attached))) {
 561                 ret = unset_notify_relay(internal);
 562                 if (ret)
 563                         goto err;
 564
 565                 vdpa_ifcvf_stop(internal);
 566
 567                 ret = vdpa_disable_vfio_intr(internal);
 568                 if (ret)
 569                         goto err;
 570
 571                 ret = ifcvf_dma_map(internal, 0);
 572                 if (ret)
 573                         goto err;
 574
 575                 rte_atomic32_set(&internal->running, 0);
 576         }
 577
 578         rte_spinlock_unlock(&internal->lock);
 579         return 0;
 580 err:
 581         rte_spinlock_unlock(&internal->lock);
 582         return ret;
 583 }
 584
 585 static int
 586 m_ifcvf_start(struct ifcvf_internal *internal)
 587 {
 588         struct ifcvf_hw *hw = &internal->hw;
 589         uint32_t i, nr_vring;
 590         int vid, ret;
 591         struct rte_vhost_vring vq;
 592         void *vring_buf;
 593         uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
 594         uint64_t size;
 595         uint64_t gpa;
 596
 597         memset(&vq, 0, sizeof(vq));
 598         vid = internal->vid;
 599         nr_vring = rte_vhost_get_vring_num(vid);
 600         rte_vhost_get_negotiated_features(vid, &hw->req_features);
 601
 602         for (i = 0; i < nr_vring; i++) {
 603                 rte_vhost_get_vhost_vring(vid, i, &vq);
 604
 605                 size = RTE_ALIGN_CEIL(vring_size(vq.size, rte_mem_page_size()),
 606                                 rte_mem_page_size());
 607                 vring_buf = rte_zmalloc("ifcvf", size, rte_mem_page_size());
 608                 vring_init(&internal->m_vring[i], vq.size, vring_buf,
 609                                 rte_mem_page_size());
 610
 611                 ret = rte_vfio_container_dma_map(internal->vfio_container_fd,
 612                         (uint64_t)(uintptr_t)vring_buf, m_vring_iova, size);
 613                 if (ret < 0) {
 614                         DRV_LOG(ERR, "mediated vring DMA map failed.");
 615                         goto error;
 616                 }
 617
 618                 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
 619                 if (gpa == 0) {
 620                         DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
 621                         return -1;
 622                 }
 623                 hw->vring[i].desc = gpa;
 624
 625                 gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
 626                 if (gpa == 0) {
 627                         DRV_LOG(ERR, "Fail to get GPA for available ring.");
 628                         return -1;
 629                 }
 630                 hw->vring[i].avail = gpa;
 631
 632                 /* Direct I/O for Tx queue, relay for Rx queue */
 633                 if (i & 1) {
 634                         gpa = hva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
 635                         if (gpa == 0) {
 636                                 DRV_LOG(ERR, "Fail to get GPA for used ring.");
 637                                 return -1;
 638                         }
 639                         hw->vring[i].used = gpa;
 640                 } else {
 641                         hw->vring[i].used = m_vring_iova +
 642                                 (char *)internal->m_vring[i].used -
 643                                 (char *)internal->m_vring[i].desc;
 644                 }
 645
 646                 hw->vring[i].size = vq.size;
 647
 648                 rte_vhost_get_vring_base(vid, i,
 649                                 &internal->m_vring[i].avail->idx,
 650                                 &internal->m_vring[i].used->idx);
 651
 652                 rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
 653                                 &hw->vring[i].last_used_idx);
 654
 655                 m_vring_iova += size;
 656         }
 657         hw->nr_vring = nr_vring;
 658
 659         return ifcvf_start_hw(&internal->hw);
 660
 661 error:
 662         for (i = 0; i < nr_vring; i++)
 663                 if (internal->m_vring[i].desc)
 664                         rte_free(internal->m_vring[i].desc);
 665
 666         return -1;
 667 }
 668
 669 static int
 670 m_ifcvf_stop(struct ifcvf_internal *internal)
 671 {
 672         int vid;
 673         uint32_t i;
 674         struct rte_vhost_vring vq;
 675         struct ifcvf_hw *hw = &internal->hw;
 676         uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
 677         uint64_t size, len;
 678
 679         vid = internal->vid;
 680         ifcvf_stop_hw(hw);
 681
 682         for (i = 0; i < hw->nr_vring; i++) {
 683                 /* synchronize remaining new used entries if any */
 684                 if ((i & 1) == 0)
 685                         update_used_ring(internal, i);
 686
 687                 rte_vhost_get_vhost_vring(vid, i, &vq);
 688                 len = IFCVF_USED_RING_LEN(vq.size);
 689                 rte_vhost_log_used_vring(vid, i, 0, len);
 690
 691                 size = RTE_ALIGN_CEIL(vring_size(vq.size, rte_mem_page_size()),
 692                                 rte_mem_page_size());
 693                 rte_vfio_container_dma_unmap(internal->vfio_container_fd,
 694                         (uint64_t)(uintptr_t)internal->m_vring[i].desc,
 695                         m_vring_iova, size);
 696
 697                 rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
 698                                 hw->vring[i].last_used_idx);
 699                 rte_free(internal->m_vring[i].desc);
 700                 m_vring_iova += size;
 701         }
 702
 703         return 0;
 704 }
 705
 706 static void
 707 update_used_ring(struct ifcvf_internal *internal, uint16_t qid)
 708 {
 709         rte_vdpa_relay_vring_used(internal->vid, qid, &internal->m_vring[qid]);
 710         rte_vhost_vring_call(internal->vid, qid);
 711 }
 712
 713 static void *
 714 vring_relay(void *arg)
 715 {
 716         int i, vid, epfd, fd, nfds;
 717         struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
 718         struct rte_vhost_vring vring;
 719         uint16_t qid, q_num;
 720         struct epoll_event events[IFCVF_MAX_QUEUES * 4];
 721         struct epoll_event ev;
 722         int nbytes;
 723         uint64_t buf;
 724
 725         vid = internal->vid;
 726         q_num = rte_vhost_get_vring_num(vid);
 727
 728         /* add notify fd and interrupt fd to epoll */
 729         epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
 730         if (epfd < 0) {
 731                 DRV_LOG(ERR, "failed to create epoll instance.");
 732                 return NULL;
 733         }
 734         internal->epfd = epfd;
 735
 736         vring.kickfd = -1;
 737         for (qid = 0; qid < q_num; qid++) {
 738                 ev.events = EPOLLIN | EPOLLPRI;
 739                 rte_vhost_get_vhost_vring(vid, qid, &vring);
 740                 ev.data.u64 = qid << 1 | (uint64_t)vring.kickfd << 32;
 741                 if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
 742                         DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
 743                         return NULL;
 744                 }
 745         }
 746
 747         for (qid = 0; qid < q_num; qid += 2) {
 748                 ev.events = EPOLLIN | EPOLLPRI;
 749                 /* leave a flag to mark it's for interrupt */
 750                 ev.data.u64 = 1 | qid << 1 |
 751                         (uint64_t)internal->intr_fd[qid] << 32;
 752                 if (epoll_ctl(epfd, EPOLL_CTL_ADD, internal->intr_fd[qid], &ev)
 753                                 < 0) {
 754                         DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
 755                         return NULL;
 756                 }
 757                 update_used_ring(internal, qid);
 758         }
 759
 760         /* start relay with a first kick */
 761         for (qid = 0; qid < q_num; qid++)
 762                 ifcvf_notify_queue(&internal->hw, qid);
 763
 764         /* listen to the events and react accordingly */
 765         for (;;) {
 766                 nfds = epoll_wait(epfd, events, q_num * 2, -1);
 767                 if (nfds < 0) {
 768                         if (errno == EINTR)
 769                                 continue;
 770                         DRV_LOG(ERR, "epoll_wait return fail\n");
 771                         return NULL;
 772                 }
 773
 774                 for (i = 0; i < nfds; i++) {
 775                         fd = (uint32_t)(events[i].data.u64 >> 32);
 776                         do {
 777                                 nbytes = read(fd, &buf, 8);
 778                                 if (nbytes < 0) {
 779                                         if (errno == EINTR ||
 780                                             errno == EWOULDBLOCK ||
 781                                             errno == EAGAIN)
 782                                                 continue;
 783                                         DRV_LOG(INFO, "Error reading "
 784                                                 "kickfd: %s",
 785                                                 strerror(errno));
 786                                 }
 787                                 break;
 788                         } while (1);
 789
 790                         qid = events[i].data.u32 >> 1;
 791
 792                         if (events[i].data.u32 & 1)
 793                                 update_used_ring(internal, qid);
 794                         else
 795                                 ifcvf_notify_queue(&internal->hw, qid);
 796                 }
 797         }
 798
 799         return NULL;
 800 }
 801
 802 static int
 803 setup_vring_relay(struct ifcvf_internal *internal)
 804 {
 805         char name[THREAD_NAME_LEN];
 806         int ret;
 807
 808         snprintf(name, sizeof(name), "ifc-vring-%d", internal->vid);
 809         ret = rte_ctrl_thread_create(&internal->tid, name, NULL, vring_relay,
 810                                      (void *)internal);
 811         if (ret != 0) {
 812                 DRV_LOG(ERR, "failed to create ring relay pthread.");
 813                 return -1;
 814         }
 815
 816         return 0;
 817 }
 818
 819 static int
 820 unset_vring_relay(struct ifcvf_internal *internal)
 821 {
 822         void *status;
 823
 824         if (internal->tid) {
 825                 pthread_cancel(internal->tid);
 826                 pthread_join(internal->tid, &status);
 827         }
 828         internal->tid = 0;
 829
 830         if (internal->epfd >= 0)
 831                 close(internal->epfd);
 832         internal->epfd = -1;
 833
 834         return 0;
 835 }
 836
 837 static int
 838 ifcvf_sw_fallback_switchover(struct ifcvf_internal *internal)
 839 {
 840         int ret;
 841         int vid = internal->vid;
 842
 843         /* stop the direct IO data path */
 844         unset_notify_relay(internal);
 845         vdpa_ifcvf_stop(internal);
 846         vdpa_disable_vfio_intr(internal);
 847
 848         ret = rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, false);
 849         if (ret && ret != -ENOTSUP)
 850                 goto error;
 851
 852         /* set up interrupt for interrupt relay */
 853         ret = vdpa_enable_vfio_intr(internal, 1);
 854         if (ret)
 855                 goto unmap;
 856
 857         /* config the VF */
 858         ret = m_ifcvf_start(internal);
 859         if (ret)
 860                 goto unset_intr;
 861
 862         /* set up vring relay thread */
 863         ret = setup_vring_relay(internal);
 864         if (ret)
 865                 goto stop_vf;
 866
 867         rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, true);
 868
 869         internal->sw_fallback_running = true;
 870
 871         return 0;
 872
 873 stop_vf:
 874         m_ifcvf_stop(internal);
 875 unset_intr:
 876         vdpa_disable_vfio_intr(internal);
 877 unmap:
 878         ifcvf_dma_map(internal, 0);
 879 error:
 880         return -1;
 881 }
 882
 883 static int
 884 ifcvf_dev_config(int vid)
 885 {
 886         struct rte_vdpa_device *vdev;
 887         struct internal_list *list;
 888         struct ifcvf_internal *internal;
 889
 890         vdev = rte_vhost_get_vdpa_device(vid);
 891         list = find_internal_resource_by_vdev(vdev);
 892         if (list == NULL) {
 893                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
 894                 return -1;
 895         }
 896
 897         internal = list->internal;
 898         internal->vid = vid;
 899         rte_atomic32_set(&internal->dev_attached, 1);
 900         update_datapath(internal);
 901
 902         if (rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, true) != 0)
 903                 DRV_LOG(NOTICE, "vDPA (%s): software relay is used.",
 904                                 vdev->device->name);
 905
 906         internal->configured = 1;
 907         return 0;
 908 }
 909
 910 static int
 911 ifcvf_dev_close(int vid)
 912 {
 913         struct rte_vdpa_device *vdev;
 914         struct internal_list *list;
 915         struct ifcvf_internal *internal;
 916
 917         vdev = rte_vhost_get_vdpa_device(vid);
 918         list = find_internal_resource_by_vdev(vdev);
 919         if (list == NULL) {
 920                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
 921                 return -1;
 922         }
 923
 924         internal = list->internal;
 925
 926         if (internal->sw_fallback_running) {
 927                 /* unset ring relay */
 928                 unset_vring_relay(internal);
 929
 930                 /* reset VF */
 931                 m_ifcvf_stop(internal);
 932
 933                 /* remove interrupt setting */
 934                 vdpa_disable_vfio_intr(internal);
 935
 936                 /* unset DMA map for guest memory */
 937                 ifcvf_dma_map(internal, 0);
 938
 939                 internal->sw_fallback_running = false;
 940         } else {
 941                 rte_atomic32_set(&internal->dev_attached, 0);
 942                 update_datapath(internal);
 943         }
 944
 945         internal->configured = 0;
 946         return 0;
 947 }
 948
 949 static int
 950 ifcvf_set_features(int vid)
 951 {
 952         uint64_t features = 0;
 953         struct rte_vdpa_device *vdev;
 954         struct internal_list *list;
 955         struct ifcvf_internal *internal;
 956         uint64_t log_base = 0, log_size = 0;
 957
 958         vdev = rte_vhost_get_vdpa_device(vid);
 959         list = find_internal_resource_by_vdev(vdev);
 960         if (list == NULL) {
 961                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
 962                 return -1;
 963         }
 964
 965         internal = list->internal;
 966         rte_vhost_get_negotiated_features(vid, &features);
 967
 968         if (!RTE_VHOST_NEED_LOG(features))
 969                 return 0;
 970
 971         if (internal->sw_lm) {
 972                 ifcvf_sw_fallback_switchover(internal);
 973         } else {
 974                 rte_vhost_get_log_base(vid, &log_base, &log_size);
 975                 rte_vfio_container_dma_map(internal->vfio_container_fd,
 976                                 log_base, IFCVF_LOG_BASE, log_size);
 977                 ifcvf_enable_logging(&internal->hw, IFCVF_LOG_BASE, log_size);
 978         }
 979
 980         return 0;
 981 }
 982
 983 static int
 984 ifcvf_get_vfio_group_fd(int vid)
 985 {
 986         struct rte_vdpa_device *vdev;
 987         struct internal_list *list;
 988
 989         vdev = rte_vhost_get_vdpa_device(vid);
 990         list = find_internal_resource_by_vdev(vdev);
 991         if (list == NULL) {
 992                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
 993                 return -1;
 994         }
 995
 996         return list->internal->vfio_group_fd;
 997 }
 998
 999 static int
1000 ifcvf_get_vfio_device_fd(int vid)
1001 {
1002         struct rte_vdpa_device *vdev;
1003         struct internal_list *list;
1004
1005         vdev = rte_vhost_get_vdpa_device(vid);
1006         list = find_internal_resource_by_vdev(vdev);
1007         if (list == NULL) {
1008                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1009                 return -1;
1010         }
1011
1012         return list->internal->vfio_dev_fd;
1013 }
1014
1015 static int
1016 ifcvf_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
1017 {
1018         struct rte_vdpa_device *vdev;
1019         struct internal_list *list;
1020         struct ifcvf_internal *internal;
1021         struct vfio_region_info reg = { .argsz = sizeof(reg) };
1022         int ret;
1023
1024         vdev = rte_vhost_get_vdpa_device(vid);
1025         list = find_internal_resource_by_vdev(vdev);
1026         if (list == NULL) {
1027                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1028                 return -1;
1029         }
1030
1031         internal = list->internal;
1032
1033         reg.index = ifcvf_get_notify_region(&internal->hw);
1034         ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, &reg);
1035         if (ret) {
1036                 DRV_LOG(ERR, "Get not get device region info: %s",
1037                                 strerror(errno));
1038                 return -1;
1039         }
1040
1041         *offset = ifcvf_get_queue_notify_off(&internal->hw, qid) + reg.offset;
1042         *size = 0x1000;
1043
1044         return 0;
1045 }
1046
1047 static int
1048 ifcvf_get_queue_num(struct rte_vdpa_device *vdev, uint32_t *queue_num)
1049 {
1050         struct internal_list *list;
1051
1052         list = find_internal_resource_by_vdev(vdev);
1053         if (list == NULL) {
1054                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1055                 return -1;
1056         }
1057
1058         *queue_num = list->internal->max_queues;
1059
1060         return 0;
1061 }
1062
1063 static int
1064 ifcvf_get_vdpa_features(struct rte_vdpa_device *vdev, uint64_t *features)
1065 {
1066         struct internal_list *list;
1067
1068         list = find_internal_resource_by_vdev(vdev);
1069         if (list == NULL) {
1070                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1071                 return -1;
1072         }
1073
1074         *features = list->internal->features;
1075
1076         return 0;
1077 }
1078
1079 #define VDPA_SUPPORTED_PROTOCOL_FEATURES \
1080                 (1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
1081                  1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ | \
1082                  1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
1083                  1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
1084                  1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD | \
1085                  1ULL << VHOST_USER_PROTOCOL_F_STATUS)
1086 static int
1087 ifcvf_get_protocol_features(struct rte_vdpa_device *vdev, uint64_t *features)
1088 {
1089         RTE_SET_USED(vdev);
1090
1091         *features = VDPA_SUPPORTED_PROTOCOL_FEATURES;
1092         return 0;
1093 }
1094
1095 static int
1096 ifcvf_set_vring_state(int vid, int vring, int state)
1097 {
1098         struct rte_vdpa_device *vdev;
1099         struct internal_list *list;
1100         struct ifcvf_internal *internal;
1101         struct ifcvf_hw *hw;
1102         struct ifcvf_pci_common_cfg *cfg;
1103         int ret = 0;
1104
1105         vdev = rte_vhost_get_vdpa_device(vid);
1106         list = find_internal_resource_by_vdev(vdev);
1107         if (list == NULL) {
1108                 DRV_LOG(ERR, "Invalid vDPA device: %p", vdev);
1109                 return -1;
1110         }
1111
1112         internal = list->internal;
1113         if (vring < 0 || vring >= internal->max_queues * 2) {
1114                 DRV_LOG(ERR, "Vring index %d not correct", vring);
1115                 return -1;
1116         }
1117
1118         hw = &internal->hw;
1119         if (!internal->configured)
1120                 goto exit;
1121
1122         cfg = hw->common_cfg;
1123         IFCVF_WRITE_REG16(vring, &cfg->queue_select);
1124         IFCVF_WRITE_REG16(!!state, &cfg->queue_enable);
1125
1126         if (!state && hw->vring[vring].enable) {
1127                 ret = vdpa_disable_vfio_intr(internal);
1128                 if (ret)
1129                         return ret;
1130         }
1131
1132         if (state && !hw->vring[vring].enable) {
1133                 ret = vdpa_enable_vfio_intr(internal, 0);
1134                 if (ret)
1135                         return ret;
1136         }
1137
1138 exit:
1139         hw->vring[vring].enable = !!state;
1140         return 0;
1141 }
1142
1143 static struct rte_vdpa_dev_ops ifcvf_ops = {
1144         .get_queue_num = ifcvf_get_queue_num,
1145         .get_features = ifcvf_get_vdpa_features,
1146         .get_protocol_features = ifcvf_get_protocol_features,
1147         .dev_conf = ifcvf_dev_config,
1148         .dev_close = ifcvf_dev_close,
1149         .set_vring_state = ifcvf_set_vring_state,
1150         .set_features = ifcvf_set_features,
1151         .migration_done = NULL,
1152         .get_vfio_group_fd = ifcvf_get_vfio_group_fd,
1153         .get_vfio_device_fd = ifcvf_get_vfio_device_fd,
1154         .get_notify_area = ifcvf_get_notify_area,
1155 };
1156
1157 static inline int
1158 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1159 {
1160         uint16_t *n = extra_args;
1161
1162         if (value == NULL || extra_args == NULL)
1163                 return -EINVAL;
1164
1165         *n = (uint16_t)strtoul(value, NULL, 0);
1166         if (*n == USHRT_MAX && errno == ERANGE)
1167                 return -1;
1168
1169         return 0;
1170 }
1171
1172 static int
1173 ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1174                 struct rte_pci_device *pci_dev)
1175 {
1176         uint64_t features;
1177         struct ifcvf_internal *internal = NULL;
1178         struct internal_list *list = NULL;
1179         int vdpa_mode = 0;
1180         int sw_fallback_lm = 0;
1181         struct rte_kvargs *kvlist = NULL;
1182         int ret = 0;
1183
1184         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1185                 return 0;
1186
1187         if (!pci_dev->device.devargs)
1188                 return 1;
1189
1190         kvlist = rte_kvargs_parse(pci_dev->device.devargs->args,
1191                         ifcvf_valid_arguments);
1192         if (kvlist == NULL)
1193                 return 1;
1194
1195         /* probe only when vdpa mode is specified */
1196         if (rte_kvargs_count(kvlist, IFCVF_VDPA_MODE) == 0) {
1197                 rte_kvargs_free(kvlist);
1198                 return 1;
1199         }
1200
1201         ret = rte_kvargs_process(kvlist, IFCVF_VDPA_MODE, &open_int,
1202                         &vdpa_mode);
1203         if (ret < 0 || vdpa_mode == 0) {
1204                 rte_kvargs_free(kvlist);
1205                 return 1;
1206         }
1207
1208         list = rte_zmalloc("ifcvf", sizeof(*list), 0);
1209         if (list == NULL)
1210                 goto error;
1211
1212         internal = rte_zmalloc("ifcvf", sizeof(*internal), 0);
1213         if (internal == NULL)
1214                 goto error;
1215
1216         internal->pdev = pci_dev;
1217         rte_spinlock_init(&internal->lock);
1218
1219         if (ifcvf_vfio_setup(internal) < 0) {
1220                 DRV_LOG(ERR, "failed to setup device %s", pci_dev->name);
1221                 goto error;
1222         }
1223
1224         if (ifcvf_init_hw(&internal->hw, internal->pdev) < 0) {
1225                 DRV_LOG(ERR, "failed to init device %s", pci_dev->name);
1226                 goto error;
1227         }
1228
1229         internal->configured = 0;
1230         internal->max_queues = IFCVF_MAX_QUEUES;
1231         features = ifcvf_get_features(&internal->hw);
1232         internal->features = (features &
1233                 ~(1ULL << VIRTIO_F_IOMMU_PLATFORM)) |
1234                 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) |
1235                 (1ULL << VIRTIO_NET_F_CTRL_VQ) |
1236                 (1ULL << VIRTIO_NET_F_STATUS) |
1237                 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) |
1238                 (1ULL << VHOST_F_LOG_ALL);
1239
1240         list->internal = internal;
1241
1242         if (rte_kvargs_count(kvlist, IFCVF_SW_FALLBACK_LM)) {
1243                 ret = rte_kvargs_process(kvlist, IFCVF_SW_FALLBACK_LM,
1244                                 &open_int, &sw_fallback_lm);
1245                 if (ret < 0)
1246                         goto error;
1247         }
1248         internal->sw_lm = sw_fallback_lm;
1249
1250         internal->vdev = rte_vdpa_register_device(&pci_dev->device, &ifcvf_ops);
1251         if (internal->vdev == NULL) {
1252                 DRV_LOG(ERR, "failed to register device %s", pci_dev->name);
1253                 goto error;
1254         }
1255
1256         pthread_mutex_lock(&internal_list_lock);
1257         TAILQ_INSERT_TAIL(&internal_list, list, next);
1258         pthread_mutex_unlock(&internal_list_lock);
1259
1260         rte_atomic32_set(&internal->started, 1);
1261         update_datapath(internal);
1262
1263         rte_kvargs_free(kvlist);
1264         return 0;
1265
1266 error:
1267         rte_kvargs_free(kvlist);
1268         rte_free(list);
1269         rte_free(internal);
1270         return -1;
1271 }
1272
1273 static int
1274 ifcvf_pci_remove(struct rte_pci_device *pci_dev)
1275 {
1276         struct ifcvf_internal *internal;
1277         struct internal_list *list;
1278
1279         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1280                 return 0;
1281
1282         list = find_internal_resource_by_dev(pci_dev);
1283         if (list == NULL) {
1284                 DRV_LOG(ERR, "Invalid device: %s", pci_dev->name);
1285                 return -1;
1286         }
1287
1288         internal = list->internal;
1289         rte_atomic32_set(&internal->started, 0);
1290         update_datapath(internal);
1291
1292         rte_pci_unmap_device(internal->pdev);
1293         rte_vfio_container_destroy(internal->vfio_container_fd);
1294         rte_vdpa_unregister_device(internal->vdev);
1295
1296         pthread_mutex_lock(&internal_list_lock);
1297         TAILQ_REMOVE(&internal_list, list, next);
1298         pthread_mutex_unlock(&internal_list_lock);
1299
1300         rte_free(list);
1301         rte_free(internal);
1302
1303         return 0;
1304 }
1305
1306 /*
1307  * IFCVF has the same vendor ID and device ID as virtio net PCI
1308  * device, with its specific subsystem vendor ID and device ID.
1309  */
1310 static const struct rte_pci_id pci_id_ifcvf_map[] = {
1311         { .class_id = RTE_CLASS_ANY_ID,
1312           .vendor_id = IFCVF_VENDOR_ID,
1313           .device_id = IFCVF_DEVICE_ID,
1314           .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
1315           .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
1316         },
1317
1318         { .vendor_id = 0, /* sentinel */
1319         },
1320 };
1321
1322 static struct rte_pci_driver rte_ifcvf_vdpa = {
1323         .id_table = pci_id_ifcvf_map,
1324         .drv_flags = 0,
1325         .probe = ifcvf_pci_probe,
1326         .remove = ifcvf_pci_remove,
1327 };
1328
1329 RTE_PMD_REGISTER_PCI(net_ifcvf, rte_ifcvf_vdpa);
1330 RTE_PMD_REGISTER_PCI_TABLE(net_ifcvf, pci_id_ifcvf_map);
1331 RTE_PMD_REGISTER_KMOD_DEP(net_ifcvf, "* vfio-pci");