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-mapping.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); 714