drivers/vdpa/vdpa_sim/vdpa_sim.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * VDPA device simulator core.
   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/slab.h>
  15 #include <linux/sched.h>
  16 #include <linux/dma-map-ops.h>
  17 #include <linux/vringh.h>
  18 #include <linux/vdpa.h>
  19 #include <linux/vhost_iotlb.h>
  20 #include <linux/iova.h>
  21
  22 #include "vdpa_sim.h"
  23
  24 #define DRV_VERSION  "0.1"
  25 #define DRV_AUTHOR   "Jason Wang <jasowang@redhat.com>"
  26 #define DRV_DESC     "vDPA Device Simulator core"
  27 #define DRV_LICENSE  "GPL v2"
  28
  29 static int batch_mapping = 1;
  30 module_param(batch_mapping, int, 0444);
  31 MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
  32
  33 static int max_iotlb_entries = 2048;
  34 module_param(max_iotlb_entries, int, 0444);
  35 MODULE_PARM_DESC(max_iotlb_entries,
  36                  "Maximum number of iotlb entries. 0 means unlimited. (default: 2048)");
  37
  38 #define VDPASIM_QUEUE_ALIGN PAGE_SIZE
  39 #define VDPASIM_QUEUE_MAX 256
  40 #define VDPASIM_VENDOR_ID 0
  41
  42 static struct vdpasim *vdpa_to_sim(struct vdpa_device *vdpa)
  43 {
  44         return container_of(vdpa, struct vdpasim, vdpa);
  45 }
  46
  47 static struct vdpasim *dev_to_sim(struct device *dev)
  48 {
  49         struct vdpa_device *vdpa = dev_to_vdpa(dev);
  50
  51         return vdpa_to_sim(vdpa);
  52 }
  53
  54 static void vdpasim_vq_notify(struct vringh *vring)
  55 {
  56         struct vdpasim_virtqueue *vq =
  57                 container_of(vring, struct vdpasim_virtqueue, vring);
  58
  59         if (!vq->cb)
  60                 return;
  61
  62         vq->cb(vq->private);
  63 }
  64
  65 static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx)
  66 {
  67         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
  68
  69         vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
  70                           VDPASIM_QUEUE_MAX, false,
  71                           (struct vring_desc *)(uintptr_t)vq->desc_addr,
  72                           (struct vring_avail *)
  73                           (uintptr_t)vq->driver_addr,
  74                           (struct vring_used *)
  75                           (uintptr_t)vq->device_addr);
  76
  77         vq->vring.notify = vdpasim_vq_notify;
  78 }
  79
  80 static void vdpasim_vq_reset(struct vdpasim *vdpasim,
  81                              struct vdpasim_virtqueue *vq)
  82 {
  83         vq->ready = false;
  84         vq->desc_addr = 0;
  85         vq->driver_addr = 0;
  86         vq->device_addr = 0;
  87         vq->cb = NULL;
  88         vq->private = NULL;
  89         vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
  90                           VDPASIM_QUEUE_MAX, false, NULL, NULL, NULL);
  91
  92         vq->vring.notify = NULL;
  93 }
  94
  95 static void vdpasim_do_reset(struct vdpasim *vdpasim)
  96 {
  97         int i;
  98
  99         spin_lock(&vdpasim->iommu_lock);
 100
 101         for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
 102                 vdpasim_vq_reset(vdpasim, &vdpasim->vqs[i]);
 103                 vringh_set_iotlb(&vdpasim->vqs[i].vring, &vdpasim->iommu[0],
 104                                  &vdpasim->iommu_lock);
 105         }
 106
 107         for (i = 0; i < vdpasim->dev_attr.nas; i++)
 108                 vhost_iotlb_reset(&vdpasim->iommu[i]);
 109
 110         spin_unlock(&vdpasim->iommu_lock);
 111
 112         vdpasim->features = 0;
 113         vdpasim->status = 0;
 114         ++vdpasim->generation;
 115 }
 116
 117 static int dir_to_perm(enum dma_data_direction dir)
 118 {
 119         int perm = -EFAULT;
 120
 121         switch (dir) {
 122         case DMA_FROM_DEVICE:
 123                 perm = VHOST_MAP_WO;
 124                 break;
 125         case DMA_TO_DEVICE:
 126                 perm = VHOST_MAP_RO;
 127                 break;
 128         case DMA_BIDIRECTIONAL:
 129                 perm = VHOST_MAP_RW;
 130                 break;
 131         default:
 132                 break;
 133         }
 134
 135         return perm;
 136 }
 137
 138 static dma_addr_t vdpasim_map_range(struct vdpasim *vdpasim, phys_addr_t paddr,
 139                                     size_t size, unsigned int perm)
 140 {
 141         struct iova *iova;
 142         dma_addr_t dma_addr;
 143         int ret;
 144
 145         /* We set the limit_pfn to the maximum (ULONG_MAX - 1) */
 146         iova = alloc_iova(&vdpasim->iova, size >> iova_shift(&vdpasim->iova),
 147                           ULONG_MAX - 1, true);
 148         if (!iova)
 149                 return DMA_MAPPING_ERROR;
 150
 151         dma_addr = iova_dma_addr(&vdpasim->iova, iova);
 152
 153         spin_lock(&vdpasim->iommu_lock);
 154         ret = vhost_iotlb_add_range(&vdpasim->iommu[0], (u64)dma_addr,
 155                                     (u64)dma_addr + size - 1, (u64)paddr, perm);
 156         spin_unlock(&vdpasim->iommu_lock);
 157
 158         if (ret) {
 159                 __free_iova(&vdpasim->iova, iova);
 160                 return DMA_MAPPING_ERROR;
 161         }
 162
 163         return dma_addr;
 164 }
 165
 166 static void vdpasim_unmap_range(struct vdpasim *vdpasim, dma_addr_t dma_addr,
 167                                 size_t size)
 168 {
 169         spin_lock(&vdpasim->iommu_lock);
 170         vhost_iotlb_del_range(&vdpasim->iommu[0], (u64)dma_addr,
 171                               (u64)dma_addr + size - 1);
 172         spin_unlock(&vdpasim->iommu_lock);
 173
 174         free_iova(&vdpasim->iova, iova_pfn(&vdpasim->iova, dma_addr));
 175 }
 176
 177 static dma_addr_t vdpasim_map_page(struct device *dev, struct page *page,
 178                                    unsigned long offset, size_t size,
 179                                    enum dma_data_direction dir,
 180                                    unsigned long attrs)
 181 {
 182         struct vdpasim *vdpasim = dev_to_sim(dev);
 183         phys_addr_t paddr = page_to_phys(page) + offset;
 184         int perm = dir_to_perm(dir);
 185
 186         if (perm < 0)
 187                 return DMA_MAPPING_ERROR;
 188
 189         return vdpasim_map_range(vdpasim, paddr, size, perm);
 190 }
 191
 192 static void vdpasim_unmap_page(struct device *dev, dma_addr_t dma_addr,
 193                                size_t size, enum dma_data_direction dir,
 194                                unsigned long attrs)
 195 {
 196         struct vdpasim *vdpasim = dev_to_sim(dev);
 197
 198         vdpasim_unmap_range(vdpasim, dma_addr, size);
 199 }
 200
 201 static void *vdpasim_alloc_coherent(struct device *dev, size_t size,
 202                                     dma_addr_t *dma_addr, gfp_t flag,
 203                                     unsigned long attrs)
 204 {
 205         struct vdpasim *vdpasim = dev_to_sim(dev);
 206         phys_addr_t paddr;
 207         void *addr;
 208
 209         addr = kmalloc(size, flag);
 210         if (!addr) {
 211                 *dma_addr = DMA_MAPPING_ERROR;
 212                 return NULL;
 213         }
 214
 215         paddr = virt_to_phys(addr);
 216
 217         *dma_addr = vdpasim_map_range(vdpasim, paddr, size, VHOST_MAP_RW);
 218         if (*dma_addr == DMA_MAPPING_ERROR) {
 219                 kfree(addr);
 220                 return NULL;
 221         }
 222
 223         return addr;
 224 }
 225
 226 static void vdpasim_free_coherent(struct device *dev, size_t size,
 227                                   void *vaddr, dma_addr_t dma_addr,
 228                                   unsigned long attrs)
 229 {
 230         struct vdpasim *vdpasim = dev_to_sim(dev);
 231
 232         vdpasim_unmap_range(vdpasim, dma_addr, size);
 233
 234         kfree(vaddr);
 235 }
 236
 237 static const struct dma_map_ops vdpasim_dma_ops = {
 238         .map_page = vdpasim_map_page,
 239         .unmap_page = vdpasim_unmap_page,
 240         .alloc = vdpasim_alloc_coherent,
 241         .free = vdpasim_free_coherent,
 242 };
 243
 244 static const struct vdpa_config_ops vdpasim_config_ops;
 245 static const struct vdpa_config_ops vdpasim_batch_config_ops;
 246
 247 struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
 248 {
 249         const struct vdpa_config_ops *ops;
 250         struct vdpasim *vdpasim;
 251         struct device *dev;
 252         int i, ret = -ENOMEM;
 253
 254         if (batch_mapping)
 255                 ops = &vdpasim_batch_config_ops;
 256         else
 257                 ops = &vdpasim_config_ops;
 258
 259         vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
 260                                     dev_attr->ngroups, dev_attr->nas,
 261                                     dev_attr->name, false);
 262         if (IS_ERR(vdpasim)) {
 263                 ret = PTR_ERR(vdpasim);
 264                 goto err_alloc;
 265         }
 266
 267         vdpasim->dev_attr = *dev_attr;
 268         INIT_WORK(&vdpasim->work, dev_attr->work_fn);
 269         spin_lock_init(&vdpasim->lock);
 270         spin_lock_init(&vdpasim->iommu_lock);
 271
 272         dev = &vdpasim->vdpa.dev;
 273         dev->dma_mask = &dev->coherent_dma_mask;
 274         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
 275                 goto err_iommu;
 276         set_dma_ops(dev, &vdpasim_dma_ops);
 277         vdpasim->vdpa.mdev = dev_attr->mgmt_dev;
 278
 279         vdpasim->config = kzalloc(dev_attr->config_size, GFP_KERNEL);
 280         if (!vdpasim->config)
 281                 goto err_iommu;
 282
 283         vdpasim->vqs = kcalloc(dev_attr->nvqs, sizeof(struct vdpasim_virtqueue),
 284                                GFP_KERNEL);
 285         if (!vdpasim->vqs)
 286                 goto err_iommu;
 287
 288         vdpasim->iommu = kmalloc_array(vdpasim->dev_attr.nas,
 289                                        sizeof(*vdpasim->iommu), GFP_KERNEL);
 290         if (!vdpasim->iommu)
 291                 goto err_iommu;
 292
 293         for (i = 0; i < vdpasim->dev_attr.nas; i++)
 294                 vhost_iotlb_init(&vdpasim->iommu[i], 0, 0);
 295
 296         vdpasim->buffer = kvmalloc(dev_attr->buffer_size, GFP_KERNEL);
 297         if (!vdpasim->buffer)
 298                 goto err_iommu;
 299
 300         for (i = 0; i < dev_attr->nvqs; i++)
 301                 vringh_set_iotlb(&vdpasim->vqs[i].vring, &vdpasim->iommu[0],
 302                                  &vdpasim->iommu_lock);
 303
 304         ret = iova_cache_get();
 305         if (ret)
 306                 goto err_iommu;
 307
 308         /* For simplicity we use an IOVA allocator with byte granularity */
 309         init_iova_domain(&vdpasim->iova, 1, 0);
 310
 311         vdpasim->vdpa.dma_dev = dev;
 312
 313         return vdpasim;
 314
 315 err_iommu:
 316         put_device(dev);
 317 err_alloc:
 318         return ERR_PTR(ret);
 319 }
 320 EXPORT_SYMBOL_GPL(vdpasim_create);
 321
 322 static int vdpasim_set_vq_address(struct vdpa_device *vdpa, u16 idx,
 323                                   u64 desc_area, u64 driver_area,
 324                                   u64 device_area)
 325 {
 326         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 327         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 328
 329         vq->desc_addr = desc_area;
 330         vq->driver_addr = driver_area;
 331         vq->device_addr = device_area;
 332
 333         return 0;
 334 }
 335
 336 static void vdpasim_set_vq_num(struct vdpa_device *vdpa, u16 idx, u32 num)
 337 {
 338         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 339         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 340
 341         vq->num = num;
 342 }
 343
 344 static void vdpasim_kick_vq(struct vdpa_device *vdpa, u16 idx)
 345 {
 346         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 347         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 348
 349         if (vq->ready)
 350                 schedule_work(&vdpasim->work);
 351 }
 352
 353 static void vdpasim_set_vq_cb(struct vdpa_device *vdpa, u16 idx,
 354                               struct vdpa_callback *cb)
 355 {
 356         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 357         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 358
 359         vq->cb = cb->callback;
 360         vq->private = cb->private;
 361 }
 362
 363 static void vdpasim_set_vq_ready(struct vdpa_device *vdpa, u16 idx, bool ready)
 364 {
 365         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 366         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 367         bool old_ready;
 368
 369         spin_lock(&vdpasim->lock);
 370         old_ready = vq->ready;
 371         vq->ready = ready;
 372         if (vq->ready && !old_ready) {
 373                 vdpasim_queue_ready(vdpasim, idx);
 374         }
 375         spin_unlock(&vdpasim->lock);
 376 }
 377
 378 static bool vdpasim_get_vq_ready(struct vdpa_device *vdpa, u16 idx)
 379 {
 380         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 381         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 382
 383         return vq->ready;
 384 }
 385
 386 static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx,
 387                                 const struct vdpa_vq_state *state)
 388 {
 389         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 390         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 391         struct vringh *vrh = &vq->vring;
 392
 393         spin_lock(&vdpasim->lock);
 394         vrh->last_avail_idx = state->split.avail_index;
 395         spin_unlock(&vdpasim->lock);
 396
 397         return 0;
 398 }
 399
 400 static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx,
 401                                 struct vdpa_vq_state *state)
 402 {
 403         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 404         struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];
 405         struct vringh *vrh = &vq->vring;
 406
 407         state->split.avail_index = vrh->last_avail_idx;
 408         return 0;
 409 }
 410
 411 static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
 412 {
 413         return VDPASIM_QUEUE_ALIGN;
 414 }
 415
 416 static u32 vdpasim_get_vq_group(struct vdpa_device *vdpa, u16 idx)
 417 {
 418         /* RX and TX belongs to group 0, CVQ belongs to group 1 */
 419         if (idx == 2)
 420                 return 1;
 421         else
 422                 return 0;
 423 }
 424
 425 static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
 426 {
 427         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 428
 429         return vdpasim->dev_attr.supported_features;
 430 }
 431
 432 static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
 433 {
 434         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 435
 436         /* DMA mapping must be done by driver */
 437         if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))
 438                 return -EINVAL;
 439
 440         vdpasim->features = features & vdpasim->dev_attr.supported_features;
 441
 442         return 0;
 443 }
 444
 445 static u64 vdpasim_get_driver_features(struct vdpa_device *vdpa)
 446 {
 447         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 448
 449         return vdpasim->features;
 450 }
 451
 452 static void vdpasim_set_config_cb(struct vdpa_device *vdpa,
 453                                   struct vdpa_callback *cb)
 454 {
 455         /* We don't support config interrupt */
 456 }
 457
 458 static u16 vdpasim_get_vq_num_max(struct vdpa_device *vdpa)
 459 {
 460         return VDPASIM_QUEUE_MAX;
 461 }
 462
 463 static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
 464 {
 465         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 466
 467         return vdpasim->dev_attr.id;
 468 }
 469
 470 static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
 471 {
 472         return VDPASIM_VENDOR_ID;
 473 }
 474
 475 static u8 vdpasim_get_status(struct vdpa_device *vdpa)
 476 {
 477         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 478         u8 status;
 479
 480         spin_lock(&vdpasim->lock);
 481         status = vdpasim->status;
 482         spin_unlock(&vdpasim->lock);
 483
 484         return status;
 485 }
 486
 487 static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
 488 {
 489         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 490
 491         spin_lock(&vdpasim->lock);
 492         vdpasim->status = status;
 493         spin_unlock(&vdpasim->lock);
 494 }
 495
 496 static int vdpasim_reset(struct vdpa_device *vdpa)
 497 {
 498         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 499
 500         spin_lock(&vdpasim->lock);
 501         vdpasim->status = 0;
 502         vdpasim_do_reset(vdpasim);
 503         spin_unlock(&vdpasim->lock);
 504
 505         return 0;
 506 }
 507
 508 static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
 509 {
 510         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 511
 512         return vdpasim->dev_attr.config_size;
 513 }
 514
 515 static void vdpasim_get_config(struct vdpa_device *vdpa, unsigned int offset,
 516                              void *buf, unsigned int len)
 517 {
 518         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 519
 520         if (offset + len > vdpasim->dev_attr.config_size)
 521                 return;
 522
 523         if (vdpasim->dev_attr.get_config)
 524                 vdpasim->dev_attr.get_config(vdpasim, vdpasim->config);
 525
 526         memcpy(buf, vdpasim->config + offset, len);
 527 }
 528
 529 static void vdpasim_set_config(struct vdpa_device *vdpa, unsigned int offset,
 530                              const void *buf, unsigned int len)
 531 {
 532         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 533
 534         if (offset + len > vdpasim->dev_attr.config_size)
 535                 return;
 536
 537         memcpy(vdpasim->config + offset, buf, len);
 538
 539         if (vdpasim->dev_attr.set_config)
 540                 vdpasim->dev_attr.set_config(vdpasim, vdpasim->config);
 541 }
 542
 543 static u32 vdpasim_get_generation(struct vdpa_device *vdpa)
 544 {
 545         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 546
 547         return vdpasim->generation;
 548 }
 549
 550 static struct vdpa_iova_range vdpasim_get_iova_range(struct vdpa_device *vdpa)
 551 {
 552         struct vdpa_iova_range range = {
 553                 .first = 0ULL,
 554                 .last = ULLONG_MAX,
 555         };
 556
 557         return range;
 558 }
 559
 560 static int vdpasim_set_group_asid(struct vdpa_device *vdpa, unsigned int group,
 561                                   unsigned int asid)
 562 {
 563         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 564         struct vhost_iotlb *iommu;
 565         int i;
 566
 567         if (group > vdpasim->dev_attr.ngroups)
 568                 return -EINVAL;
 569
 570         if (asid >= vdpasim->dev_attr.nas)
 571                 return -EINVAL;
 572
 573         iommu = &vdpasim->iommu[asid];
 574
 575         spin_lock(&vdpasim->lock);
 576
 577         for (i = 0; i < vdpasim->dev_attr.nvqs; i++)
 578                 if (vdpasim_get_vq_group(vdpa, i) == group)
 579                         vringh_set_iotlb(&vdpasim->vqs[i].vring, iommu,
 580                                          &vdpasim->iommu_lock);
 581
 582         spin_unlock(&vdpasim->lock);
 583
 584         return 0;
 585 }
 586
 587 static int vdpasim_set_map(struct vdpa_device *vdpa, unsigned int asid,
 588                            struct vhost_iotlb *iotlb)
 589 {
 590         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 591         struct vhost_iotlb_map *map;
 592         struct vhost_iotlb *iommu;
 593         u64 start = 0ULL, last = 0ULL - 1;
 594         int ret;
 595
 596         if (asid >= vdpasim->dev_attr.nas)
 597                 return -EINVAL;
 598
 599         spin_lock(&vdpasim->iommu_lock);
 600
 601         iommu = &vdpasim->iommu[asid];
 602         vhost_iotlb_reset(iommu);
 603
 604         for (map = vhost_iotlb_itree_first(iotlb, start, last); map;
 605              map = vhost_iotlb_itree_next(map, start, last)) {
 606                 ret = vhost_iotlb_add_range(iommu, map->start,
 607                                             map->last, map->addr, map->perm);
 608                 if (ret)
 609                         goto err;
 610         }
 611         spin_unlock(&vdpasim->iommu_lock);
 612         return 0;
 613
 614 err:
 615         vhost_iotlb_reset(iommu);
 616         spin_unlock(&vdpasim->iommu_lock);
 617         return ret;
 618 }
 619
 620 static int vdpasim_dma_map(struct vdpa_device *vdpa, unsigned int asid,
 621                            u64 iova, u64 size,
 622                            u64 pa, u32 perm, void *opaque)
 623 {
 624         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 625         int ret;
 626
 627         if (asid >= vdpasim->dev_attr.nas)
 628                 return -EINVAL;
 629
 630         spin_lock(&vdpasim->iommu_lock);
 631         ret = vhost_iotlb_add_range_ctx(&vdpasim->iommu[asid], iova,
 632                                         iova + size - 1, pa, perm, opaque);
 633         spin_unlock(&vdpasim->iommu_lock);
 634
 635         return ret;
 636 }
 637
 638 static int vdpasim_dma_unmap(struct vdpa_device *vdpa, unsigned int asid,
 639                              u64 iova, u64 size)
 640 {
 641         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 642
 643         if (asid >= vdpasim->dev_attr.nas)
 644                 return -EINVAL;
 645
 646         spin_lock(&vdpasim->iommu_lock);
 647         vhost_iotlb_del_range(&vdpasim->iommu[asid], iova, iova + size - 1);
 648         spin_unlock(&vdpasim->iommu_lock);
 649
 650         return 0;
 651 }
 652
 653 static void vdpasim_free(struct vdpa_device *vdpa)
 654 {
 655         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 656         int i;
 657
 658         cancel_work_sync(&vdpasim->work);
 659
 660         for (i = 0; i < vdpasim->dev_attr.nvqs; i++) {
 661                 vringh_kiov_cleanup(&vdpasim->vqs[i].out_iov);
 662                 vringh_kiov_cleanup(&vdpasim->vqs[i].in_iov);
 663         }
 664
 665         if (vdpa_get_dma_dev(vdpa)) {
 666                 put_iova_domain(&vdpasim->iova);
 667                 iova_cache_put();
 668         }
 669
 670         kvfree(vdpasim->buffer);
 671         vhost_iotlb_free(vdpasim->iommu);
 672         kfree(vdpasim->vqs);
 673         kfree(vdpasim->config);
 674 }
 675
 676 static const struct vdpa_config_ops vdpasim_config_ops = {
 677         .set_vq_address         = vdpasim_set_vq_address,
 678         .set_vq_num             = vdpasim_set_vq_num,
 679         .kick_vq                = vdpasim_kick_vq,
 680         .set_vq_cb              = vdpasim_set_vq_cb,
 681         .set_vq_ready           = vdpasim_set_vq_ready,
 682         .get_vq_ready           = vdpasim_get_vq_ready,
 683         .set_vq_state           = vdpasim_set_vq_state,
 684         .get_vq_state           = vdpasim_get_vq_state,
 685         .get_vq_align           = vdpasim_get_vq_align,
 686         .get_vq_group           = vdpasim_get_vq_group,
 687         .get_device_features    = vdpasim_get_device_features,
 688         .set_driver_features    = vdpasim_set_driver_features,
 689         .get_driver_features    = vdpasim_get_driver_features,
 690         .set_config_cb          = vdpasim_set_config_cb,
 691         .get_vq_num_max         = vdpasim_get_vq_num_max,
 692         .get_device_id          = vdpasim_get_device_id,
 693         .get_vendor_id          = vdpasim_get_vendor_id,
 694         .get_status             = vdpasim_get_status,
 695         .set_status             = vdpasim_set_status,
 696         .reset                  = vdpasim_reset,
 697         .get_config_size        = vdpasim_get_config_size,
 698         .get_config             = vdpasim_get_config,
 699         .set_config             = vdpasim_set_config,
 700         .get_generation         = vdpasim_get_generation,
 701         .get_iova_range         = vdpasim_get_iova_range,
 702         .set_group_asid         = vdpasim_set_group_asid,
 703         .dma_map                = vdpasim_dma_map,
 704         .dma_unmap              = vdpasim_dma_unmap,
 705         .free                   = vdpasim_free,
 706 };
 707
 708 static const struct vdpa_config_ops vdpasim_batch_config_ops = {
 709         .set_vq_address         = vdpasim_set_vq_address,
 710         .set_vq_num             = vdpasim_set_vq_num,
 711         .kick_vq                = vdpasim_kick_vq,
 712         .set_vq_cb              = vdpasim_set_vq_cb,
 713         .set_vq_ready           = vdpasim_set_vq_ready,
 714         .get_vq_ready           = vdpasim_get_vq_ready,
 715         .set_vq_state           = vdpasim_set_vq_state,
 716         .get_vq_state           = vdpasim_get_vq_state,
 717         .get_vq_align           = vdpasim_get_vq_align,
 718         .get_vq_group           = vdpasim_get_vq_group,
 719         .get_device_features    = vdpasim_get_device_features,
 720         .set_driver_features    = vdpasim_set_driver_features,
 721         .get_driver_features    = vdpasim_get_driver_features,
 722         .set_config_cb          = vdpasim_set_config_cb,
 723         .get_vq_num_max         = vdpasim_get_vq_num_max,
 724         .get_device_id          = vdpasim_get_device_id,
 725         .get_vendor_id          = vdpasim_get_vendor_id,
 726         .get_status             = vdpasim_get_status,
 727         .set_status             = vdpasim_set_status,
 728         .reset                  = vdpasim_reset,
 729         .get_config_size        = vdpasim_get_config_size,
 730         .get_config             = vdpasim_get_config,
 731         .set_config             = vdpasim_set_config,
 732         .get_generation         = vdpasim_get_generation,
 733         .get_iova_range         = vdpasim_get_iova_range,
 734         .set_group_asid         = vdpasim_set_group_asid,
 735         .set_map                = vdpasim_set_map,
 736         .free                   = vdpasim_free,
 737 };
 738
 739 MODULE_VERSION(DRV_VERSION);
 740 MODULE_LICENSE(DRV_LICENSE);
 741 MODULE_AUTHOR(DRV_AUTHOR);
 742 MODULE_DESCRIPTION(DRV_DESC);