drivers/vdpa/vdpa_sim/vdpa_sim.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * VDPA networking device simulator.
   4  *
   5  * Copyright (c) 2020, Red Hat Inc. All rights reserved.
   6  *     Author: Jason Wang <jasowang@redhat.com>
   7  *
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/kernel.h>
  14 #include <linux/fs.h>
  15 #include <linux/poll.h>
  16 #include <linux/slab.h>
  17 #include <linux/sched.h>
  18 #include <linux/wait.h>
  19 #include <linux/uuid.h>
  20 #include <linux/iommu.h>
  21 #include <linux/dma-map-ops.h>
  22 #include <linux/sysfs.h>
  23 #include <linux/file.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/vringh.h>
  26 #include <linux/vdpa.h>
  27 #include <linux/virtio_byteorder.h>
  28 #include <linux/vhost_iotlb.h>
  29 #include <uapi/linux/virtio_config.h>
  30 #include <uapi/linux/virtio_net.h>
  31
  32 #define DRV_VERSION  "0.1"
  33 #define DRV_AUTHOR   "Jason Wang <jasowang@redhat.com>"
  34 #define DRV_DESC     "vDPA Device Simulator"
  35 #define DRV_LICENSE  "GPL v2"
  36
  37 static int batch_mapping = 1;
  38 module_param(batch_mapping, int, 0444);
  39 MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
  40
  41 struct vdpasim_virtqueue {
  42         struct vringh vring;
  43         struct vringh_kiov iov;
  44         unsigned short head;
  45         bool ready;
  46         u64 desc_addr;
  47         u64 device_addr;
  48         u64 driver_addr;
  49         u32 num;
  50         void *private;
  51         irqreturn_t (*cb)(void *data);
  52 };
  53
  54 #define VDPASIM_QUEUE_ALIGN PAGE_SIZE
  55 #define VDPASIM_QUEUE_MAX 256
  56 #define VDPASIM_DEVICE_ID 0x1
  57 #define VDPASIM_VENDOR_ID 0
  58 #define VDPASIM_VQ_NUM 0x2
  59 #define VDPASIM_NAME "vdpasim-netdev"
  60
  61 static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
  62                               (1ULL << VIRTIO_F_VERSION_1)  |
  63                               (1ULL << VIRTIO_F_ACCESS_PLATFORM);
  64
  65 /* State of each vdpasim device */
  66 struct vdpasim {
  67         struct vdpa_device vdpa;
  68         struct vdpasim_virtqueue vqs[VDPASIM_VQ_NUM];
  69         struct work_struct work;
  70         /* spinlock to synchronize virtqueue state */
  71         spinlock_t lock;
  72         struct virtio_net_config config;
  73         struct vhost_iotlb *iommu;
  74         void *buffer;
  75         u32 status;
  76         u32 generation;
  77         u64 features;
  78         /* spinlock to synchronize iommu table */
  79         spinlock_t iommu_lock;
  80 };
  81
  82 /* TODO: cross-endian support */
  83 static inline bool vdpasim_is_little_endian(struct vdpasim *vdpasim)
  84 {
  85         return virtio_legacy_is_little_endian() ||
  86                 (vdpasim->features & (1ULL << VIRTIO_F_VERSION_1));
  87 }
  88
  89 static inline u16 vdpasim16_to_cpu(struct vdpasim *vdpasim, __virtio16 val)
  90 {
  91         return __virtio16_to_cpu(vdpasim_is_little_endian(vdpasim), val);
  92 }
  93
  94 static inline __virtio16 cpu_to_vdpasim16(struct vdpasim *vdpasim, u16 val)
  95 {
  96         return __cpu_to_virtio16(vdpasim_is_little_endian(vdpasim), val);
  97 }
  98
  99 static struct vdpasim *vdpasim_dev;
 100
 101 static struct vdpasim *vdpa_to_sim(struct vdpa_device *vdpa)
 102 {
 103         return container_of(vdpa, struct vdpasim, vdpa);
 104 }
 105
 106 static struct vdpasim *dev_to_sim(struct device *dev)
 107 {
 108         struct vdpa_device *vdpa = dev_to_vdpa(dev);
 109
 110         return vdpa_to_sim(vdpa);
 111 }
 112
 113 static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
 114 {
 115         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 116
 117         vringh_init_iotlb(&vq->vring, vdpasim_features,
 118                           VDPASIM_QUEUE_MAX, false,
 119                           (struct vring_desc *)(uintptr_t)vq->desc_addr,
 120                           (struct vring_avail *)
 121                           (uintptr_t)vq->driver_addr,
 122                           (struct vring_used *)
 123                           (uintptr_t)vq->device_addr);
 124 }
 125
 126 static void vdpasim_vq_reset(struct vdpasim_virtqueue *vq)
 127 {
 128         vq->ready = false;
 129         vq->desc_addr = 0;
 130         vq->driver_addr = 0;
 131         vq->device_addr = 0;
 132         vq->cb = NULL;
 133         vq->private = NULL;
 134         vringh_init_iotlb(&vq->vring, vdpasim_features, VDPASIM_QUEUE_MAX,
 135                           false, NULL, NULL, NULL);
 136 }
 137
 138 static void vdpasim_reset(struct vdpasim *vdpasim)
 139 {
 140         int i;
 141
 142         for (i = 0; i < VDPASIM_VQ_NUM; i++)
 143                 vdpasim_vq_reset(&vdpasim->vqs[i]);
 144
 145         spin_lock(&vdpasim->iommu_lock);
 146         vhost_iotlb_reset(vdpasim->iommu);
 147         spin_unlock(&vdpasim->iommu_lock);
 148
 149         vdpasim->features = 0;
 150         vdpasim->status = 0;
 151         ++vdpasim->generation;
 152 }
 153
 154 static void vdpasim_work(struct work_struct *work)
 155 {
 156         struct vdpasim *vdpasim = container_of(work, struct
 157                                                  vdpasim, work);
 158         struct vdpasim_virtqueue *txq = &vdpasim->vqs[1];
 159         struct vdpasim_virtqueue *rxq = &vdpasim->vqs[0];
 160         ssize_t read, write;
 161         size_t total_write;
 162         int pkts = 0;
 163         int err;
 164
 165         spin_lock(&vdpasim->lock);
 166
 167         if (!(vdpasim->status & VIRTIO_CONFIG_S_DRIVER_OK))
 168                 goto out;
 169
 170         if (!txq->ready || !rxq->ready)
 171                 goto out;
 172
 173         while (true) {
 174                 total_write = 0;
 175                 err = vringh_getdesc_iotlb(&txq->vring, &txq->iov, NULL,
 176                                            &txq->head, GFP_ATOMIC);
 177                 if (err <= 0)
 178                         break;
 179
 180                 err = vringh_getdesc_iotlb(&rxq->vring, NULL, &rxq->iov,
 181                                            &rxq->head, GFP_ATOMIC);
 182                 if (err <= 0) {
 183                         vringh_complete_iotlb(&txq->vring, txq->head, 0);
 184                         break;
 185                 }
 186
 187                 while (true) {
 188                         read = vringh_iov_pull_iotlb(&txq->vring, &txq->iov,
 189                                                      vdpasim->buffer,
 190                                                      PAGE_SIZE);
 191                         if (read <= 0)
 192                                 break;
 193
 194                         write = vringh_iov_push_iotlb(&rxq->vring, &rxq->iov,
 195                                                       vdpasim->buffer, read);
 196                         if (write <= 0)
 197                                 break;
 198
 199                         total_write += write;
 200                 }
 201
 202                 /* Make sure data is wrote before advancing index */
 203                 smp_wmb();
 204
 205                 vringh_complete_iotlb(&txq->vring, txq->head, 0);
 206                 vringh_complete_iotlb(&rxq->vring, rxq->head, total_write);
 207
 208                 /* Make sure used is visible before rasing the interrupt. */
 209                 smp_wmb();
 210
 211                 local_bh_disable();
 212                 if (txq->cb)
 213                         txq->cb(txq->private);
 214                 if (rxq->cb)
 215                         rxq->cb(rxq->private);
 216                 local_bh_enable();
 217
 218                 if (++pkts > 4) {
 219                         schedule_work(&vdpasim->work);
 220                         goto out;
 221                 }
 222         }
 223
 224 out:
 225         spin_unlock(&vdpasim->lock);
 226 }
 227
 228 static int dir_to_perm(enum dma_data_direction dir)
 229 {
 230         int perm = -EFAULT;
 231
 232         switch (dir) {
 233         case DMA_FROM_DEVICE:
 234                 perm = VHOST_MAP_WO;
 235                 break;
 236         case DMA_TO_DEVICE:
 237                 perm = VHOST_MAP_RO;
 238                 break;
 239         case DMA_BIDIRECTIONAL:
 240                 perm = VHOST_MAP_RW;
 241                 break;
 242         default:
 243                 break;
 244         }
 245
 246         return perm;
 247 }
 248
 249 static dma_addr_t vdpasim_map_page(struct device *dev, struct page *page,
 250                                    unsigned long offset, size_t size,
 251                                    enum dma_data_direction dir,
 252                                    unsigned long attrs)
 253 {
 254         struct vdpasim *vdpasim = dev_to_sim(dev);
 255         struct vhost_iotlb *iommu = vdpasim->iommu;
 256         u64 pa = (page_to_pfn(page) << PAGE_SHIFT) + offset;
 257         int ret, perm = dir_to_perm(dir);
 258
 259         if (perm < 0)
 260                 return DMA_MAPPING_ERROR;
 261
 262         /* For simplicity, use identical mapping to avoid e.g iova
 263          * allocator.
 264          */
 265         spin_lock(&vdpasim->iommu_lock);
 266         ret = vhost_iotlb_add_range(iommu, pa, pa + size - 1,
 267                                     pa, dir_to_perm(dir));
 268         spin_unlock(&vdpasim->iommu_lock);
 269         if (ret)
 270                 return DMA_MAPPING_ERROR;
 271
 272         return (dma_addr_t)(pa);
 273 }
 274
 275 static void vdpasim_unmap_page(struct device *dev, dma_addr_t dma_addr,
 276                                size_t size, enum dma_data_direction dir,
 277                                unsigned long attrs)
 278 {
 279         struct vdpasim *vdpasim = dev_to_sim(dev);
 280         struct vhost_iotlb *iommu = vdpasim->iommu;
 281
 282         spin_lock(&vdpasim->iommu_lock);
 283         vhost_iotlb_del_range(iommu, (u64)dma_addr,
 284                               (u64)dma_addr + size - 1);
 285         spin_unlock(&vdpasim->iommu_lock);
 286 }
 287
 288 static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
 289                                     dma_addr_t *dma_addr, gfp_t flag,
 290                                     unsigned long attrs)
 291 {
 292         struct vdpasim *vdpasim = dev_to_sim(dev);
 293         struct vhost_iotlb *iommu = vdpasim->iommu;
 294         void *addr = kmalloc(size, flag);
 295         int ret;
 296
 297         spin_lock(&vdpasim->iommu_lock);
 298         if (!addr) {
 299                 *dma_addr = DMA_MAPPING_ERROR;
 300         } else {
 301                 u64 pa = virt_to_phys(addr);
 302
 303                 ret = vhost_iotlb_add_range(iommu, (u64)pa,
 304                                             (u64)pa + size - 1,
 305                                             pa, VHOST_MAP_RW);
 306                 if (ret) {
 307                         *dma_addr = DMA_MAPPING_ERROR;
 308                         kfree(addr);
 309                         addr = NULL;
 310                 } else
 311                         *dma_addr = (dma_addr_t)pa;
 312         }
 313         spin_unlock(&vdpasim->iommu_lock);
 314
 315         return addr;
 316 }
 317
 318 static void vdpasim_free_coherent(struct device *dev, size_t size,
 319                                   void *vaddr, dma_addr_t dma_addr,
 320                                   unsigned long attrs)
 321 {
 322         struct vdpasim *vdpasim = dev_to_sim(dev);
 323         struct vhost_iotlb *iommu = vdpasim->iommu;
 324
 325         spin_lock(&vdpasim->iommu_lock);
 326         vhost_iotlb_del_range(iommu, (u64)dma_addr,
 327                               (u64)dma_addr + size - 1);
 328         spin_unlock(&vdpasim->iommu_lock);
 329
 330         kfree(phys_to_virt((uintptr_t)dma_addr));
 331 }
 332
 333 static const struct dma_map_ops vdpasim_dma_ops = {
 334         .map_page = vdpasim_map_page,
 335         .unmap_page = vdpasim_unmap_page,
 336         .alloc = vdpasim_alloc_coherent,
 337         .free = vdpasim_free_coherent,
 338 };
 339
 340 static const struct vdpa_config_ops vdpasim_net_config_ops;
 341 static const struct vdpa_config_ops vdpasim_net_batch_config_ops;
 342
 343 static struct vdpasim *vdpasim_create(void)
 344 {
 345         const struct vdpa_config_ops *ops;
 346         struct vdpasim *vdpasim;
 347         struct device *dev;
 348         int ret = -ENOMEM;
 349
 350         if (batch_mapping)
 351                 ops = &vdpasim_net_batch_config_ops;
 352         else
 353                 ops = &vdpasim_net_config_ops;
 354
 355         vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM);
 356         if (!vdpasim)
 357                 goto err_alloc;
 358
 359         INIT_WORK(&vdpasim->work, vdpasim_work);
 360         spin_lock_init(&vdpasim->lock);
 361         spin_lock_init(&vdpasim->iommu_lock);
 362
 363         dev = &vdpasim->vdpa.dev;
 364         dev->coherent_dma_mask = DMA_BIT_MASK(64);
 365         set_dma_ops(dev, &vdpasim_dma_ops);
 366
 367         vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
 368         if (!vdpasim->iommu)
 369                 goto err_iommu;
 370
 371         vdpasim->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
 372         if (!vdpasim->buffer)
 373                 goto err_iommu;
 374
 375         eth_random_addr(vdpasim->config.mac);
 376
 377         vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
 378         vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
 379
 380         vdpasim->vdpa.dma_dev = dev;
 381         ret = vdpa_register_device(&vdpasim->vdpa);
 382         if (ret)
 383                 goto err_iommu;
 384
 385         return vdpasim;
 386
 387 err_iommu:
 388         put_device(dev);
 389 err_alloc:
 390         return ERR_PTR(ret);
 391 }
 392
 393 static int vdpasim_set_vq_address(struct vdpa_device *vdpa, u16 idx,
 394                                   u64 desc_area, u64 driver_area,
 395                                   u64 device_area)
 396 {
 397         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 398         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 399
 400         vq->desc_addr = desc_area;
 401         vq->driver_addr = driver_area;
 402         vq->device_addr = device_area;
 403
 404         return 0;
 405 }
 406
 407 static void vdpasim_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
 408 {
 409         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 410         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 411
 412         vq->num = num;
 413 }
 414
 415 static void vdpasim_kick_vq(struct vdpa_device *vdpa, u16 idx)
 416 {
 417         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 418         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 419
 420         if (vq->ready)
 421                 schedule_work(&vdpasim->work);
 422 }
 423
 424 static void vdpasim_set_vq_cb(struct vdpa_device *vdpa, u16 idx,
 425                               struct vdpa_callback *cb)
 426 {
 427         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 428         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 429
 430         vq->cb = cb->callback;
 431         vq->private = cb->private;
 432 }
 433
 434 static void vdpasim_set_vq_ready(struct vdpa_device *vdpa, u16 idx, bool ready)
 435 {
 436         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 437         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 438
 439         spin_lock(&vdpasim->lock);
 440         vq->ready = ready;
 441         if (vq->ready)
 442                 vdpasim_queue_ready(vdpasim, idx);
 443         spin_unlock(&vdpasim->lock);
 444 }
 445
 446 static bool vdpasim_get_vq_ready(struct vdpa_device *vdpa, u16 idx)
 447 {
 448         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 449         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 450
 451         return vq->ready;
 452 }
 453
 454 static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx,
 455                                 const struct vdpa_vq_state *state)
 456 {
 457         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 458         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 459         struct vringh *vrh = &vq->vring;
 460
 461         spin_lock(&vdpasim->lock);
 462         vrh->last_avail_idx = state->avail_index;
 463         spin_unlock(&vdpasim->lock);
 464
 465         return 0;
 466 }
 467
 468 static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx,
 469                                 struct vdpa_vq_state *state)
 470 {
 471         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 472         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 473         struct vringh *vrh = &vq->vring;
 474
 475         state->avail_index = vrh->last_avail_idx;
 476         return 0;
 477 }
 478
 479 static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
 480 {
 481         return VDPASIM_QUEUE_ALIGN;
 482 }
 483
 484 static u64 vdpasim_get_features(struct vdpa_device *vdpa)
 485 {
 486         return vdpasim_features;
 487 }
 488
 489 static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
 490 {
 491         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 492         struct virtio_net_config *config = &vdpasim->config;
 493
 494         /* DMA mapping must be done by driver */
 495         if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
 496                 return -EINVAL;
 497
 498         vdpasim->features = features & vdpasim_features;
 499
 500         /* We generally only know whether guest is using the legacy interface
 501          * here, so generally that's the earliest we can set config fields.
 502          * Note: We actually require VIRTIO_F_ACCESS_PLATFORM above which
 503          * implies VIRTIO_F_VERSION_1, but let's not try to be clever here.
 504          */
 505
 506         config->mtu = cpu_to_vdpasim16(vdpasim, 1500);
 507         config->status = cpu_to_vdpasim16(vdpasim, VIRTIO_NET_S_LINK_UP);
 508         return 0;
 509 }
 510
 511 static void vdpasim_set_config_cb(struct vdpa_device *vdpa,
 512                                   struct vdpa_callback *cb)
 513 {
 514         /* We don't support config interrupt */
 515 }
 516
 517 static u16 vdpasim_get_vq_num_max(struct vdpa_device *vdpa)
 518 {
 519         return VDPASIM_QUEUE_MAX;
 520 }
 521
 522 static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
 523 {
 524         return VDPASIM_DEVICE_ID;
 525 }
 526
 527 static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
 528 {
 529         return VDPASIM_VENDOR_ID;
 530 }
 531
 532 static u8 vdpasim_get_status(struct vdpa_device *vdpa)
 533 {
 534         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 535         u8 status;
 536
 537         spin_lock(&vdpasim->lock);
 538         status = vdpasim->status;
 539         spin_unlock(&vdpasim->lock);
 540
 541         return status;
 542 }
 543
 544 static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
 545 {
 546         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 547
 548         spin_lock(&vdpasim->lock);
 549         vdpasim->status = status;
 550         if (status == 0)
 551                 vdpasim_reset(vdpasim);
 552         spin_unlock(&vdpasim->lock);
 553 }
 554
 555 static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
 556                              void *buf, unsigned int len)
 557 {
 558         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 559
 560         if (offset + len < sizeof(struct virtio_net_config))
 561                 memcpy(buf, (u8 *)&vdpasim->config + offset, len);
 562 }
 563
 564 static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
 565                              const void *buf, unsigned int len)
 566 {
 567         /* No writable config supportted by vdpasim */
 568 }
 569
 570 static u32 vdpasim_get_generation(struct vdpa_device *vdpa)
 571 {
 572         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 573
 574         return vdpasim->generation;
 575 }
 576
 577 static int vdpasim_set_map(struct vdpa_device *vdpa,
 578                            struct vhost_iotlb *iotlb)
 579 {
 580         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 581         struct vhost_iotlb_map *map;
 582         u64 start = 0ULL, last = 0ULL - 1;
 583         int ret;
 584
 585         spin_lock(&vdpasim->iommu_lock);
 586         vhost_iotlb_reset(vdpasim->iommu);
 587
 588         for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
 589              map = vhost_iotlb_itree_next(map, start, last)) {
 590                 ret = vhost_iotlb_add_range(vdpasim->iommu, map->start,
 591                                             map->last, map->addr, map->perm);
 592                 if (ret)
 593                         goto err;
 594         }
 595         spin_unlock(&vdpasim->iommu_lock);
 596         return 0;
 597
 598 err:
 599         vhost_iotlb_reset(vdpasim->iommu);
 600         spin_unlock(&vdpasim->iommu_lock);
 601         return ret;
 602 }
 603
 604 static int vdpasim_dma_map(struct vdpa_device *vdpa, u64 iova, u64 size,
 605                            u64 pa, u32 perm)
 606 {
 607         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 608         int ret;
 609
 610         spin_lock(&vdpasim->iommu_lock);
 611         ret = vhost_iotlb_add_range(vdpasim->iommu, iova, iova + size - 1, pa,
 612                                     perm);
 613         spin_unlock(&vdpasim->iommu_lock);
 614
 615         return ret;
 616 }
 617
 618 static int vdpasim_dma_unmap(struct vdpa_device *vdpa, u64 iova, u64 size)
 619 {
 620         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 621
 622         spin_lock(&vdpasim->iommu_lock);
 623         vhost_iotlb_del_range(vdpasim->iommu, iova, iova + size - 1);
 624         spin_unlock(&vdpasim->iommu_lock);
 625
 626         return 0;
 627 }
 628
 629 static void vdpasim_free(struct vdpa_device *vdpa)
 630 {
 631         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 632
 633         cancel_work_sync(&vdpasim->work);
 634         kfree(vdpasim->buffer);
 635         if (vdpasim->iommu)
 636                 vhost_iotlb_free(vdpasim->iommu);
 637 }
 638
 639 static const struct vdpa_config_ops vdpasim_net_config_ops = {
 640         .set_vq_address         = vdpasim_set_vq_address,
 641         .set_vq_num             = vdpasim_set_vq_num,
 642         .kick_vq                = vdpasim_kick_vq,
 643         .set_vq_cb              = vdpasim_set_vq_cb,
 644         .set_vq_ready           = vdpasim_set_vq_ready,
 645         .get_vq_ready           = vdpasim_get_vq_ready,
 646         .set_vq_state           = vdpasim_set_vq_state,
 647         .get_vq_state           = vdpasim_get_vq_state,
 648         .get_vq_align           = vdpasim_get_vq_align,
 649         .get_features           = vdpasim_get_features,
 650         .set_features           = vdpasim_set_features,
 651         .set_config_cb          = vdpasim_set_config_cb,
 652         .get_vq_num_max         = vdpasim_get_vq_num_max,
 653         .get_device_id          = vdpasim_get_device_id,
 654         .get_vendor_id          = vdpasim_get_vendor_id,
 655         .get_status             = vdpasim_get_status,
 656         .set_status             = vdpasim_set_status,
 657         .get_config             = vdpasim_get_config,
 658         .set_config             = vdpasim_set_config,
 659         .get_generation         = vdpasim_get_generation,
 660         .dma_map                = vdpasim_dma_map,
 661         .dma_unmap              = vdpasim_dma_unmap,
 662         .free                   = vdpasim_free,
 663 };
 664
 665 static const struct vdpa_config_ops vdpasim_net_batch_config_ops = {
 666         .set_vq_address         = vdpasim_set_vq_address,
 667         .set_vq_num             = vdpasim_set_vq_num,
 668         .kick_vq                = vdpasim_kick_vq,
 669         .set_vq_cb              = vdpasim_set_vq_cb,
 670         .set_vq_ready           = vdpasim_set_vq_ready,
 671         .get_vq_ready           = vdpasim_get_vq_ready,
 672         .set_vq_state           = vdpasim_set_vq_state,
 673         .get_vq_state           = vdpasim_get_vq_state,
 674         .get_vq_align           = vdpasim_get_vq_align,
 675         .get_features           = vdpasim_get_features,
 676         .set_features           = vdpasim_set_features,
 677         .set_config_cb          = vdpasim_set_config_cb,
 678         .get_vq_num_max         = vdpasim_get_vq_num_max,
 679         .get_device_id          = vdpasim_get_device_id,
 680         .get_vendor_id          = vdpasim_get_vendor_id,
 681         .get_status             = vdpasim_get_status,
 682         .set_status             = vdpasim_set_status,
 683         .get_config             = vdpasim_get_config,
 684         .set_config             = vdpasim_set_config,
 685         .get_generation         = vdpasim_get_generation,
 686         .set_map                = vdpasim_set_map,
 687         .free                   = vdpasim_free,
 688 };
 689
 690 static int __init vdpasim_dev_init(void)
 691 {
 692         vdpasim_dev = vdpasim_create();
 693
 694         if (!IS_ERR(vdpasim_dev))
 695                 return 0;
 696
 697         return PTR_ERR(vdpasim_dev);
 698 }
 699
 700 static void __exit vdpasim_dev_exit(void)
 701 {
 702         struct vdpa_device *vdpa = &vdpasim_dev->vdpa;
 703
 704         vdpa_unregister_device(vdpa);
 705 }
 706
 707 module_init(vdpasim_dev_init)
 708 module_exit(vdpasim_dev_exit)
 709
 710 MODULE_VERSION(DRV_VERSION);
 711 MODULE_LICENSE(DRV_LICENSE);
 712 MODULE_AUTHOR(DRV_AUTHOR);
 713 MODULE_DESCRIPTION(DRV_DESC);