1 /* 2 * Copyright (C) 2015 Red Hat, Inc. 3 * All Rights Reserved. 4 * 5 * Authors: 6 * Dave Airlie 7 * Alon Levy 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 #include <linux/file.h> 29 #include <linux/sync_file.h> 30 31 #include <drm/drm_file.h> 32 #include <drm/ttm/ttm_execbuf_util.h> 33 #include <drm/virtgpu_drm.h> 34 35 #include "virtgpu_drv.h" 36 37 static void convert_to_hw_box(struct virtio_gpu_box *dst, 38 const struct drm_virtgpu_3d_box *src) 39 { 40 dst->x = cpu_to_le32(src->x); 41 dst->y = cpu_to_le32(src->y); 42 dst->z = cpu_to_le32(src->z); 43 dst->w = cpu_to_le32(src->w); 44 dst->h = cpu_to_le32(src->h); 45 dst->d = cpu_to_le32(src->d); 46 } 47 48 static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data, 49 struct drm_file *file_priv) 50 { 51 struct virtio_gpu_device *vgdev = dev->dev_private; 52 struct drm_virtgpu_map *virtio_gpu_map = data; 53 54 return virtio_gpu_mode_dumb_mmap(file_priv, vgdev->ddev, 55 virtio_gpu_map->handle, 56 &virtio_gpu_map->offset); 57 } 58 59 int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket, 60 struct list_head *head) 61 { 62 struct ttm_operation_ctx ctx = { false, false }; 63 struct ttm_validate_buffer *buf; 64 struct ttm_buffer_object *bo; 65 struct virtio_gpu_object *qobj; 66 int ret; 67 68 ret = ttm_eu_reserve_buffers(ticket, head, true, NULL, true); 69 if (ret != 0) 70 return ret; 71 72 list_for_each_entry(buf, head, head) { 73 bo = buf->bo; 74 qobj = container_of(bo, struct virtio_gpu_object, tbo); 75 ret = ttm_bo_validate(bo, &qobj->placement, &ctx); 76 if (ret) { 77 ttm_eu_backoff_reservation(ticket, head); 78 return ret; 79 } 80 } 81 return 0; 82 } 83 84 void virtio_gpu_unref_list(struct list_head *head) 85 { 86 struct ttm_validate_buffer *buf; 87 struct ttm_buffer_object *bo; 88 struct virtio_gpu_object *qobj; 89 90 list_for_each_entry(buf, head, head) { 91 bo = buf->bo; 92 qobj = container_of(bo, struct virtio_gpu_object, tbo); 93 94 drm_gem_object_put_unlocked(&qobj->gem_base); 95 } 96 } 97 98 /* 99 * Usage of execbuffer: 100 * Relocations need to take into account the full VIRTIO_GPUDrawable size. 101 * However, the command as passed from user space must *not* contain the initial 102 * VIRTIO_GPUReleaseInfo struct (first XXX bytes) 103 */ 104 static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data, 105 struct drm_file *drm_file) 106 { 107 struct drm_virtgpu_execbuffer *exbuf = data; 108 struct virtio_gpu_device *vgdev = dev->dev_private; 109 struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv; 110 struct drm_gem_object *gobj; 111 struct virtio_gpu_fence *out_fence; 112 struct virtio_gpu_object *qobj; 113 int ret; 114 uint32_t *bo_handles = NULL; 115 void __user *user_bo_handles = NULL; 116 struct list_head validate_list; 117 struct ttm_validate_buffer *buflist = NULL; 118 int i; 119 struct ww_acquire_ctx ticket; 120 struct sync_file *sync_file; 121 int in_fence_fd = exbuf->fence_fd; 122 int out_fence_fd = -1; 123 void *buf; 124 125 if (vgdev->has_virgl_3d == false) 126 return -ENOSYS; 127 128 if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS)) 129 return -EINVAL; 130 131 exbuf->fence_fd = -1; 132 133 if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) { 134 struct dma_fence *in_fence; 135 136 in_fence = sync_file_get_fence(in_fence_fd); 137 138 if (!in_fence) 139 return -EINVAL; 140 141 /* 142 * Wait if the fence is from a foreign context, or if the fence 143 * array contains any fence from a foreign context. 144 */ 145 ret = 0; 146 if (!dma_fence_match_context(in_fence, vgdev->fence_drv.context)) 147 ret = dma_fence_wait(in_fence, true); 148 149 dma_fence_put(in_fence); 150 if (ret) 151 return ret; 152 } 153 154 if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) { 155 out_fence_fd = get_unused_fd_flags(O_CLOEXEC); 156 if (out_fence_fd < 0) 157 return out_fence_fd; 158 } 159 160 INIT_LIST_HEAD(&validate_list); 161 if (exbuf->num_bo_handles) { 162 163 bo_handles = kvmalloc_array(exbuf->num_bo_handles, 164 sizeof(uint32_t), GFP_KERNEL); 165 buflist = kvmalloc_array(exbuf->num_bo_handles, 166 sizeof(struct ttm_validate_buffer), 167 GFP_KERNEL | __GFP_ZERO); 168 if (!bo_handles || !buflist) { 169 ret = -ENOMEM; 170 goto out_unused_fd; 171 } 172 173 user_bo_handles = u64_to_user_ptr(exbuf->bo_handles); 174 if (copy_from_user(bo_handles, user_bo_handles, 175 exbuf->num_bo_handles * sizeof(uint32_t))) { 176 ret = -EFAULT; 177 goto out_unused_fd; 178 } 179 180 for (i = 0; i < exbuf->num_bo_handles; i++) { 181 gobj = drm_gem_object_lookup(drm_file, bo_handles[i]); 182 if (!gobj) { 183 ret = -ENOENT; 184 goto out_unused_fd; 185 } 186 187 qobj = gem_to_virtio_gpu_obj(gobj); 188 buflist[i].bo = &qobj->tbo; 189 190 list_add(&buflist[i].head, &validate_list); 191 } 192 kvfree(bo_handles); 193 bo_handles = NULL; 194 } 195 196 ret = virtio_gpu_object_list_validate(&ticket, &validate_list); 197 if (ret) 198 goto out_free; 199 200 buf = memdup_user(u64_to_user_ptr(exbuf->command), exbuf->size); 201 if (IS_ERR(buf)) { 202 ret = PTR_ERR(buf); 203 goto out_unresv; 204 } 205 206 out_fence = virtio_gpu_fence_alloc(vgdev); 207 if(!out_fence) { 208 ret = -ENOMEM; 209 goto out_memdup; 210 } 211 212 if (out_fence_fd >= 0) { 213 sync_file = sync_file_create(&out_fence->f); 214 if (!sync_file) { 215 dma_fence_put(&out_fence->f); 216 ret = -ENOMEM; 217 goto out_memdup; 218 } 219 220 exbuf->fence_fd = out_fence_fd; 221 fd_install(out_fence_fd, sync_file->file); 222 } 223 224 virtio_gpu_cmd_submit(vgdev, buf, exbuf->size, 225 vfpriv->ctx_id, out_fence); 226 227 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &out_fence->f); 228 229 /* fence the command bo */ 230 virtio_gpu_unref_list(&validate_list); 231 kvfree(buflist); 232 return 0; 233 234 out_memdup: 235 kfree(buf); 236 out_unresv: 237 ttm_eu_backoff_reservation(&ticket, &validate_list); 238 out_free: 239 virtio_gpu_unref_list(&validate_list); 240 out_unused_fd: 241 kvfree(bo_handles); 242 kvfree(buflist); 243 244 if (out_fence_fd >= 0) 245 put_unused_fd(out_fence_fd); 246 247 return ret; 248 } 249 250 static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data, 251 struct drm_file *file_priv) 252 { 253 struct virtio_gpu_device *vgdev = dev->dev_private; 254 struct drm_virtgpu_getparam *param = data; 255 int value; 256 257 switch (param->param) { 258 case VIRTGPU_PARAM_3D_FEATURES: 259 value = vgdev->has_virgl_3d == true ? 1 : 0; 260 break; 261 case VIRTGPU_PARAM_CAPSET_QUERY_FIX: 262 value = 1; 263 break; 264 default: 265 return -EINVAL; 266 } 267 if (copy_to_user(u64_to_user_ptr(param->value), &value, sizeof(int))) 268 return -EFAULT; 269 270 return 0; 271 } 272 273 static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data, 274 struct drm_file *file_priv) 275 { 276 struct virtio_gpu_device *vgdev = dev->dev_private; 277 struct drm_virtgpu_resource_create *rc = data; 278 struct virtio_gpu_fence *fence; 279 int ret; 280 struct virtio_gpu_object *qobj; 281 struct drm_gem_object *obj; 282 uint32_t handle = 0; 283 struct virtio_gpu_object_params params = { 0 }; 284 285 if (vgdev->has_virgl_3d == false) { 286 if (rc->depth > 1) 287 return -EINVAL; 288 if (rc->nr_samples > 1) 289 return -EINVAL; 290 if (rc->last_level > 1) 291 return -EINVAL; 292 if (rc->target != 2) 293 return -EINVAL; 294 if (rc->array_size > 1) 295 return -EINVAL; 296 } 297 298 params.format = rc->format; 299 params.width = rc->width; 300 params.height = rc->height; 301 params.size = rc->size; 302 if (vgdev->has_virgl_3d) { 303 params.virgl = true; 304 params.target = rc->target; 305 params.bind = rc->bind; 306 params.depth = rc->depth; 307 params.array_size = rc->array_size; 308 params.last_level = rc->last_level; 309 params.nr_samples = rc->nr_samples; 310 params.flags = rc->flags; 311 } 312 /* allocate a single page size object */ 313 if (params.size == 0) 314 params.size = PAGE_SIZE; 315 316 fence = virtio_gpu_fence_alloc(vgdev); 317 if (!fence) 318 return -ENOMEM; 319 qobj = virtio_gpu_alloc_object(dev, ¶ms, fence); 320 dma_fence_put(&fence->f); 321 if (IS_ERR(qobj)) 322 return PTR_ERR(qobj); 323 obj = &qobj->gem_base; 324 325 ret = drm_gem_handle_create(file_priv, obj, &handle); 326 if (ret) { 327 drm_gem_object_release(obj); 328 return ret; 329 } 330 drm_gem_object_put_unlocked(obj); 331 332 rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */ 333 rc->bo_handle = handle; 334 return 0; 335 } 336 337 static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data, 338 struct drm_file *file_priv) 339 { 340 struct drm_virtgpu_resource_info *ri = data; 341 struct drm_gem_object *gobj = NULL; 342 struct virtio_gpu_object *qobj = NULL; 343 344 gobj = drm_gem_object_lookup(file_priv, ri->bo_handle); 345 if (gobj == NULL) 346 return -ENOENT; 347 348 qobj = gem_to_virtio_gpu_obj(gobj); 349 350 ri->size = qobj->gem_base.size; 351 ri->res_handle = qobj->hw_res_handle; 352 drm_gem_object_put_unlocked(gobj); 353 return 0; 354 } 355 356 static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev, 357 void *data, 358 struct drm_file *file) 359 { 360 struct virtio_gpu_device *vgdev = dev->dev_private; 361 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 362 struct drm_virtgpu_3d_transfer_from_host *args = data; 363 struct ttm_operation_ctx ctx = { true, false }; 364 struct drm_gem_object *gobj = NULL; 365 struct virtio_gpu_object *qobj = NULL; 366 struct virtio_gpu_fence *fence; 367 int ret; 368 u32 offset = args->offset; 369 struct virtio_gpu_box box; 370 371 if (vgdev->has_virgl_3d == false) 372 return -ENOSYS; 373 374 gobj = drm_gem_object_lookup(file, args->bo_handle); 375 if (gobj == NULL) 376 return -ENOENT; 377 378 qobj = gem_to_virtio_gpu_obj(gobj); 379 380 ret = virtio_gpu_object_reserve(qobj, false); 381 if (ret) 382 goto out; 383 384 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx); 385 if (unlikely(ret)) 386 goto out_unres; 387 388 convert_to_hw_box(&box, &args->box); 389 390 fence = virtio_gpu_fence_alloc(vgdev); 391 if (!fence) { 392 ret = -ENOMEM; 393 goto out_unres; 394 } 395 virtio_gpu_cmd_transfer_from_host_3d 396 (vgdev, qobj->hw_res_handle, 397 vfpriv->ctx_id, offset, args->level, 398 &box, fence); 399 reservation_object_add_excl_fence(qobj->tbo.base.resv, 400 &fence->f); 401 402 dma_fence_put(&fence->f); 403 out_unres: 404 virtio_gpu_object_unreserve(qobj); 405 out: 406 drm_gem_object_put_unlocked(gobj); 407 return ret; 408 } 409 410 static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data, 411 struct drm_file *file) 412 { 413 struct virtio_gpu_device *vgdev = dev->dev_private; 414 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 415 struct drm_virtgpu_3d_transfer_to_host *args = data; 416 struct ttm_operation_ctx ctx = { true, false }; 417 struct drm_gem_object *gobj = NULL; 418 struct virtio_gpu_object *qobj = NULL; 419 struct virtio_gpu_fence *fence; 420 struct virtio_gpu_box box; 421 int ret; 422 u32 offset = args->offset; 423 424 gobj = drm_gem_object_lookup(file, args->bo_handle); 425 if (gobj == NULL) 426 return -ENOENT; 427 428 qobj = gem_to_virtio_gpu_obj(gobj); 429 430 ret = virtio_gpu_object_reserve(qobj, false); 431 if (ret) 432 goto out; 433 434 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx); 435 if (unlikely(ret)) 436 goto out_unres; 437 438 convert_to_hw_box(&box, &args->box); 439 if (!vgdev->has_virgl_3d) { 440 virtio_gpu_cmd_transfer_to_host_2d 441 (vgdev, qobj, offset, 442 box.w, box.h, box.x, box.y, NULL); 443 } else { 444 fence = virtio_gpu_fence_alloc(vgdev); 445 if (!fence) { 446 ret = -ENOMEM; 447 goto out_unres; 448 } 449 virtio_gpu_cmd_transfer_to_host_3d 450 (vgdev, qobj, 451 vfpriv ? vfpriv->ctx_id : 0, offset, 452 args->level, &box, fence); 453 reservation_object_add_excl_fence(qobj->tbo.base.resv, 454 &fence->f); 455 dma_fence_put(&fence->f); 456 } 457 458 out_unres: 459 virtio_gpu_object_unreserve(qobj); 460 out: 461 drm_gem_object_put_unlocked(gobj); 462 return ret; 463 } 464 465 static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data, 466 struct drm_file *file) 467 { 468 struct drm_virtgpu_3d_wait *args = data; 469 struct drm_gem_object *gobj = NULL; 470 struct virtio_gpu_object *qobj = NULL; 471 int ret; 472 bool nowait = false; 473 474 gobj = drm_gem_object_lookup(file, args->handle); 475 if (gobj == NULL) 476 return -ENOENT; 477 478 qobj = gem_to_virtio_gpu_obj(gobj); 479 480 if (args->flags & VIRTGPU_WAIT_NOWAIT) 481 nowait = true; 482 ret = virtio_gpu_object_wait(qobj, nowait); 483 484 drm_gem_object_put_unlocked(gobj); 485 return ret; 486 } 487 488 static int virtio_gpu_get_caps_ioctl(struct drm_device *dev, 489 void *data, struct drm_file *file) 490 { 491 struct virtio_gpu_device *vgdev = dev->dev_private; 492 struct drm_virtgpu_get_caps *args = data; 493 unsigned size, host_caps_size; 494 int i; 495 int found_valid = -1; 496 int ret; 497 struct virtio_gpu_drv_cap_cache *cache_ent; 498 void *ptr; 499 500 if (vgdev->num_capsets == 0) 501 return -ENOSYS; 502 503 /* don't allow userspace to pass 0 */ 504 if (args->size == 0) 505 return -EINVAL; 506 507 spin_lock(&vgdev->display_info_lock); 508 for (i = 0; i < vgdev->num_capsets; i++) { 509 if (vgdev->capsets[i].id == args->cap_set_id) { 510 if (vgdev->capsets[i].max_version >= args->cap_set_ver) { 511 found_valid = i; 512 break; 513 } 514 } 515 } 516 517 if (found_valid == -1) { 518 spin_unlock(&vgdev->display_info_lock); 519 return -EINVAL; 520 } 521 522 host_caps_size = vgdev->capsets[found_valid].max_size; 523 /* only copy to user the minimum of the host caps size or the guest caps size */ 524 size = min(args->size, host_caps_size); 525 526 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) { 527 if (cache_ent->id == args->cap_set_id && 528 cache_ent->version == args->cap_set_ver) { 529 spin_unlock(&vgdev->display_info_lock); 530 goto copy_exit; 531 } 532 } 533 spin_unlock(&vgdev->display_info_lock); 534 535 /* not in cache - need to talk to hw */ 536 virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver, 537 &cache_ent); 538 539 copy_exit: 540 ret = wait_event_timeout(vgdev->resp_wq, 541 atomic_read(&cache_ent->is_valid), 5 * HZ); 542 if (!ret) 543 return -EBUSY; 544 545 /* is_valid check must proceed before copy of the cache entry. */ 546 smp_rmb(); 547 548 ptr = cache_ent->caps_cache; 549 550 if (copy_to_user(u64_to_user_ptr(args->addr), ptr, size)) 551 return -EFAULT; 552 553 return 0; 554 } 555 556 struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = { 557 DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl, 558 DRM_RENDER_ALLOW), 559 560 DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl, 561 DRM_RENDER_ALLOW), 562 563 DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl, 564 DRM_RENDER_ALLOW), 565 566 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE, 567 virtio_gpu_resource_create_ioctl, 568 DRM_RENDER_ALLOW), 569 570 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl, 571 DRM_RENDER_ALLOW), 572 573 /* make transfer async to the main ring? - no sure, can we 574 * thread these in the underlying GL 575 */ 576 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST, 577 virtio_gpu_transfer_from_host_ioctl, 578 DRM_RENDER_ALLOW), 579 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST, 580 virtio_gpu_transfer_to_host_ioctl, 581 DRM_RENDER_ALLOW), 582 583 DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl, 584 DRM_RENDER_ALLOW), 585 586 DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl, 587 DRM_RENDER_ALLOW), 588 }; 589