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 #include <linux/uaccess.h>
31 
32 #include <drm/drm_file.h>
33 #include <drm/virtgpu_drm.h>
34 
35 #include "virtgpu_drv.h"
36 
37 #define VIRTGPU_BLOB_FLAG_USE_MASK (VIRTGPU_BLOB_FLAG_USE_MAPPABLE | \
38 				    VIRTGPU_BLOB_FLAG_USE_SHAREABLE | \
39 				    VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE)
40 
41 void virtio_gpu_create_context(struct drm_device *dev, struct drm_file *file)
42 {
43 	struct virtio_gpu_device *vgdev = dev->dev_private;
44 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
45 	char dbgname[TASK_COMM_LEN];
46 
47 	mutex_lock(&vfpriv->context_lock);
48 	if (vfpriv->context_created)
49 		goto out_unlock;
50 
51 	get_task_comm(dbgname, current);
52 	virtio_gpu_cmd_context_create(vgdev, vfpriv->ctx_id,
53 				      strlen(dbgname), dbgname);
54 	vfpriv->context_created = true;
55 
56 out_unlock:
57 	mutex_unlock(&vfpriv->context_lock);
58 }
59 
60 static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
61 				struct drm_file *file)
62 {
63 	struct virtio_gpu_device *vgdev = dev->dev_private;
64 	struct drm_virtgpu_map *virtio_gpu_map = data;
65 
66 	return virtio_gpu_mode_dumb_mmap(file, vgdev->ddev,
67 					 virtio_gpu_map->handle,
68 					 &virtio_gpu_map->offset);
69 }
70 
71 /*
72  * Usage of execbuffer:
73  * Relocations need to take into account the full VIRTIO_GPUDrawable size.
74  * However, the command as passed from user space must *not* contain the initial
75  * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
76  */
77 static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
78 				 struct drm_file *file)
79 {
80 	struct drm_virtgpu_execbuffer *exbuf = data;
81 	struct virtio_gpu_device *vgdev = dev->dev_private;
82 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
83 	struct virtio_gpu_fence *out_fence;
84 	int ret;
85 	uint32_t *bo_handles = NULL;
86 	void __user *user_bo_handles = NULL;
87 	struct virtio_gpu_object_array *buflist = NULL;
88 	struct sync_file *sync_file;
89 	int in_fence_fd = exbuf->fence_fd;
90 	int out_fence_fd = -1;
91 	void *buf;
92 
93 	if (vgdev->has_virgl_3d == false)
94 		return -ENOSYS;
95 
96 	if ((exbuf->flags & ~VIRTGPU_EXECBUF_FLAGS))
97 		return -EINVAL;
98 
99 	exbuf->fence_fd = -1;
100 
101 	virtio_gpu_create_context(dev, file);
102 	if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_IN) {
103 		struct dma_fence *in_fence;
104 
105 		in_fence = sync_file_get_fence(in_fence_fd);
106 
107 		if (!in_fence)
108 			return -EINVAL;
109 
110 		/*
111 		 * Wait if the fence is from a foreign context, or if the fence
112 		 * array contains any fence from a foreign context.
113 		 */
114 		ret = 0;
115 		if (!dma_fence_match_context(in_fence, vgdev->fence_drv.context))
116 			ret = dma_fence_wait(in_fence, true);
117 
118 		dma_fence_put(in_fence);
119 		if (ret)
120 			return ret;
121 	}
122 
123 	if (exbuf->flags & VIRTGPU_EXECBUF_FENCE_FD_OUT) {
124 		out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
125 		if (out_fence_fd < 0)
126 			return out_fence_fd;
127 	}
128 
129 	if (exbuf->num_bo_handles) {
130 		bo_handles = kvmalloc_array(exbuf->num_bo_handles,
131 					    sizeof(uint32_t), GFP_KERNEL);
132 		if (!bo_handles) {
133 			ret = -ENOMEM;
134 			goto out_unused_fd;
135 		}
136 
137 		user_bo_handles = u64_to_user_ptr(exbuf->bo_handles);
138 		if (copy_from_user(bo_handles, user_bo_handles,
139 				   exbuf->num_bo_handles * sizeof(uint32_t))) {
140 			ret = -EFAULT;
141 			goto out_unused_fd;
142 		}
143 
144 		buflist = virtio_gpu_array_from_handles(file, bo_handles,
145 							exbuf->num_bo_handles);
146 		if (!buflist) {
147 			ret = -ENOENT;
148 			goto out_unused_fd;
149 		}
150 		kvfree(bo_handles);
151 		bo_handles = NULL;
152 	}
153 
154 	buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
155 	if (IS_ERR(buf)) {
156 		ret = PTR_ERR(buf);
157 		goto out_unused_fd;
158 	}
159 
160 	if (buflist) {
161 		ret = virtio_gpu_array_lock_resv(buflist);
162 		if (ret)
163 			goto out_memdup;
164 	}
165 
166 	out_fence = virtio_gpu_fence_alloc(vgdev);
167 	if(!out_fence) {
168 		ret = -ENOMEM;
169 		goto out_unresv;
170 	}
171 
172 	if (out_fence_fd >= 0) {
173 		sync_file = sync_file_create(&out_fence->f);
174 		if (!sync_file) {
175 			dma_fence_put(&out_fence->f);
176 			ret = -ENOMEM;
177 			goto out_memdup;
178 		}
179 
180 		exbuf->fence_fd = out_fence_fd;
181 		fd_install(out_fence_fd, sync_file->file);
182 	}
183 
184 	virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
185 			      vfpriv->ctx_id, buflist, out_fence);
186 	dma_fence_put(&out_fence->f);
187 	virtio_gpu_notify(vgdev);
188 	return 0;
189 
190 out_unresv:
191 	if (buflist)
192 		virtio_gpu_array_unlock_resv(buflist);
193 out_memdup:
194 	kvfree(buf);
195 out_unused_fd:
196 	kvfree(bo_handles);
197 	if (buflist)
198 		virtio_gpu_array_put_free(buflist);
199 
200 	if (out_fence_fd >= 0)
201 		put_unused_fd(out_fence_fd);
202 
203 	return ret;
204 }
205 
206 static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
207 				     struct drm_file *file)
208 {
209 	struct virtio_gpu_device *vgdev = dev->dev_private;
210 	struct drm_virtgpu_getparam *param = data;
211 	int value;
212 
213 	switch (param->param) {
214 	case VIRTGPU_PARAM_3D_FEATURES:
215 		value = vgdev->has_virgl_3d ? 1 : 0;
216 		break;
217 	case VIRTGPU_PARAM_CAPSET_QUERY_FIX:
218 		value = 1;
219 		break;
220 	case VIRTGPU_PARAM_RESOURCE_BLOB:
221 		value = vgdev->has_resource_blob ? 1 : 0;
222 		break;
223 	case VIRTGPU_PARAM_HOST_VISIBLE:
224 		value = vgdev->has_host_visible ? 1 : 0;
225 		break;
226 	case VIRTGPU_PARAM_CROSS_DEVICE:
227 		value = vgdev->has_resource_assign_uuid ? 1 : 0;
228 		break;
229 	default:
230 		return -EINVAL;
231 	}
232 	if (copy_to_user(u64_to_user_ptr(param->value), &value, sizeof(int)))
233 		return -EFAULT;
234 
235 	return 0;
236 }
237 
238 static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
239 					    struct drm_file *file)
240 {
241 	struct virtio_gpu_device *vgdev = dev->dev_private;
242 	struct drm_virtgpu_resource_create *rc = data;
243 	struct virtio_gpu_fence *fence;
244 	int ret;
245 	struct virtio_gpu_object *qobj;
246 	struct drm_gem_object *obj;
247 	uint32_t handle = 0;
248 	struct virtio_gpu_object_params params = { 0 };
249 
250 	if (vgdev->has_virgl_3d) {
251 		virtio_gpu_create_context(dev, file);
252 		params.virgl = true;
253 		params.target = rc->target;
254 		params.bind = rc->bind;
255 		params.depth = rc->depth;
256 		params.array_size = rc->array_size;
257 		params.last_level = rc->last_level;
258 		params.nr_samples = rc->nr_samples;
259 		params.flags = rc->flags;
260 	} else {
261 		if (rc->depth > 1)
262 			return -EINVAL;
263 		if (rc->nr_samples > 1)
264 			return -EINVAL;
265 		if (rc->last_level > 1)
266 			return -EINVAL;
267 		if (rc->target != 2)
268 			return -EINVAL;
269 		if (rc->array_size > 1)
270 			return -EINVAL;
271 	}
272 
273 	params.format = rc->format;
274 	params.width = rc->width;
275 	params.height = rc->height;
276 	params.size = rc->size;
277 	/* allocate a single page size object */
278 	if (params.size == 0)
279 		params.size = PAGE_SIZE;
280 
281 	fence = virtio_gpu_fence_alloc(vgdev);
282 	if (!fence)
283 		return -ENOMEM;
284 	ret = virtio_gpu_object_create(vgdev, &params, &qobj, fence);
285 	dma_fence_put(&fence->f);
286 	if (ret < 0)
287 		return ret;
288 	obj = &qobj->base.base;
289 
290 	ret = drm_gem_handle_create(file, obj, &handle);
291 	if (ret) {
292 		drm_gem_object_release(obj);
293 		return ret;
294 	}
295 	drm_gem_object_put(obj);
296 
297 	rc->res_handle = qobj->hw_res_handle; /* similiar to a VM address */
298 	rc->bo_handle = handle;
299 	return 0;
300 }
301 
302 static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
303 					  struct drm_file *file)
304 {
305 	struct drm_virtgpu_resource_info *ri = data;
306 	struct drm_gem_object *gobj = NULL;
307 	struct virtio_gpu_object *qobj = NULL;
308 
309 	gobj = drm_gem_object_lookup(file, ri->bo_handle);
310 	if (gobj == NULL)
311 		return -ENOENT;
312 
313 	qobj = gem_to_virtio_gpu_obj(gobj);
314 
315 	ri->size = qobj->base.base.size;
316 	ri->res_handle = qobj->hw_res_handle;
317 	if (qobj->host3d_blob || qobj->guest_blob)
318 		ri->blob_mem = qobj->blob_mem;
319 
320 	drm_gem_object_put(gobj);
321 	return 0;
322 }
323 
324 static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
325 					       void *data,
326 					       struct drm_file *file)
327 {
328 	struct virtio_gpu_device *vgdev = dev->dev_private;
329 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
330 	struct drm_virtgpu_3d_transfer_from_host *args = data;
331 	struct virtio_gpu_object *bo;
332 	struct virtio_gpu_object_array *objs;
333 	struct virtio_gpu_fence *fence;
334 	int ret;
335 	u32 offset = args->offset;
336 
337 	if (vgdev->has_virgl_3d == false)
338 		return -ENOSYS;
339 
340 	virtio_gpu_create_context(dev, file);
341 	objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
342 	if (objs == NULL)
343 		return -ENOENT;
344 
345 	bo = gem_to_virtio_gpu_obj(objs->objs[0]);
346 	if (bo->guest_blob && !bo->host3d_blob) {
347 		ret = -EINVAL;
348 		goto err_put_free;
349 	}
350 
351 	if (!bo->host3d_blob && (args->stride || args->layer_stride)) {
352 		ret = -EINVAL;
353 		goto err_put_free;
354 	}
355 
356 	ret = virtio_gpu_array_lock_resv(objs);
357 	if (ret != 0)
358 		goto err_put_free;
359 
360 	fence = virtio_gpu_fence_alloc(vgdev);
361 	if (!fence) {
362 		ret = -ENOMEM;
363 		goto err_unlock;
364 	}
365 
366 	virtio_gpu_cmd_transfer_from_host_3d
367 		(vgdev, vfpriv->ctx_id, offset, args->level, args->stride,
368 		 args->layer_stride, &args->box, objs, fence);
369 	dma_fence_put(&fence->f);
370 	virtio_gpu_notify(vgdev);
371 	return 0;
372 
373 err_unlock:
374 	virtio_gpu_array_unlock_resv(objs);
375 err_put_free:
376 	virtio_gpu_array_put_free(objs);
377 	return ret;
378 }
379 
380 static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
381 					     struct drm_file *file)
382 {
383 	struct virtio_gpu_device *vgdev = dev->dev_private;
384 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
385 	struct drm_virtgpu_3d_transfer_to_host *args = data;
386 	struct virtio_gpu_object *bo;
387 	struct virtio_gpu_object_array *objs;
388 	struct virtio_gpu_fence *fence;
389 	int ret;
390 	u32 offset = args->offset;
391 
392 	objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
393 	if (objs == NULL)
394 		return -ENOENT;
395 
396 	bo = gem_to_virtio_gpu_obj(objs->objs[0]);
397 	if (bo->guest_blob && !bo->host3d_blob) {
398 		ret = -EINVAL;
399 		goto err_put_free;
400 	}
401 
402 	if (!vgdev->has_virgl_3d) {
403 		virtio_gpu_cmd_transfer_to_host_2d
404 			(vgdev, offset,
405 			 args->box.w, args->box.h, args->box.x, args->box.y,
406 			 objs, NULL);
407 	} else {
408 		virtio_gpu_create_context(dev, file);
409 
410 		if (!bo->host3d_blob && (args->stride || args->layer_stride)) {
411 			ret = -EINVAL;
412 			goto err_put_free;
413 		}
414 
415 		ret = virtio_gpu_array_lock_resv(objs);
416 		if (ret != 0)
417 			goto err_put_free;
418 
419 		ret = -ENOMEM;
420 		fence = virtio_gpu_fence_alloc(vgdev);
421 		if (!fence)
422 			goto err_unlock;
423 
424 		virtio_gpu_cmd_transfer_to_host_3d
425 			(vgdev,
426 			 vfpriv ? vfpriv->ctx_id : 0, offset, args->level,
427 			 args->stride, args->layer_stride, &args->box, objs,
428 			 fence);
429 		dma_fence_put(&fence->f);
430 	}
431 	virtio_gpu_notify(vgdev);
432 	return 0;
433 
434 err_unlock:
435 	virtio_gpu_array_unlock_resv(objs);
436 err_put_free:
437 	virtio_gpu_array_put_free(objs);
438 	return ret;
439 }
440 
441 static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
442 				 struct drm_file *file)
443 {
444 	struct drm_virtgpu_3d_wait *args = data;
445 	struct drm_gem_object *obj;
446 	long timeout = 15 * HZ;
447 	int ret;
448 
449 	obj = drm_gem_object_lookup(file, args->handle);
450 	if (obj == NULL)
451 		return -ENOENT;
452 
453 	if (args->flags & VIRTGPU_WAIT_NOWAIT) {
454 		ret = dma_resv_test_signaled_rcu(obj->resv, true);
455 	} else {
456 		ret = dma_resv_wait_timeout_rcu(obj->resv, true, true,
457 						timeout);
458 	}
459 	if (ret == 0)
460 		ret = -EBUSY;
461 	else if (ret > 0)
462 		ret = 0;
463 
464 	drm_gem_object_put(obj);
465 	return ret;
466 }
467 
468 static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
469 				void *data, struct drm_file *file)
470 {
471 	struct virtio_gpu_device *vgdev = dev->dev_private;
472 	struct drm_virtgpu_get_caps *args = data;
473 	unsigned size, host_caps_size;
474 	int i;
475 	int found_valid = -1;
476 	int ret;
477 	struct virtio_gpu_drv_cap_cache *cache_ent;
478 	void *ptr;
479 
480 	if (vgdev->num_capsets == 0)
481 		return -ENOSYS;
482 
483 	/* don't allow userspace to pass 0 */
484 	if (args->size == 0)
485 		return -EINVAL;
486 
487 	spin_lock(&vgdev->display_info_lock);
488 	for (i = 0; i < vgdev->num_capsets; i++) {
489 		if (vgdev->capsets[i].id == args->cap_set_id) {
490 			if (vgdev->capsets[i].max_version >= args->cap_set_ver) {
491 				found_valid = i;
492 				break;
493 			}
494 		}
495 	}
496 
497 	if (found_valid == -1) {
498 		spin_unlock(&vgdev->display_info_lock);
499 		return -EINVAL;
500 	}
501 
502 	host_caps_size = vgdev->capsets[found_valid].max_size;
503 	/* only copy to user the minimum of the host caps size or the guest caps size */
504 	size = min(args->size, host_caps_size);
505 
506 	list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
507 		if (cache_ent->id == args->cap_set_id &&
508 		    cache_ent->version == args->cap_set_ver) {
509 			spin_unlock(&vgdev->display_info_lock);
510 			goto copy_exit;
511 		}
512 	}
513 	spin_unlock(&vgdev->display_info_lock);
514 
515 	/* not in cache - need to talk to hw */
516 	virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
517 				  &cache_ent);
518 	virtio_gpu_notify(vgdev);
519 
520 copy_exit:
521 	ret = wait_event_timeout(vgdev->resp_wq,
522 				 atomic_read(&cache_ent->is_valid), 5 * HZ);
523 	if (!ret)
524 		return -EBUSY;
525 
526 	/* is_valid check must proceed before copy of the cache entry. */
527 	smp_rmb();
528 
529 	ptr = cache_ent->caps_cache;
530 
531 	if (copy_to_user(u64_to_user_ptr(args->addr), ptr, size))
532 		return -EFAULT;
533 
534 	return 0;
535 }
536 
537 static int verify_blob(struct virtio_gpu_device *vgdev,
538 		       struct virtio_gpu_fpriv *vfpriv,
539 		       struct virtio_gpu_object_params *params,
540 		       struct drm_virtgpu_resource_create_blob *rc_blob,
541 		       bool *guest_blob, bool *host3d_blob)
542 {
543 	if (!vgdev->has_resource_blob)
544 		return -EINVAL;
545 
546 	if ((rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK) ||
547 	    !rc_blob->blob_flags)
548 		return -EINVAL;
549 
550 	if (rc_blob->blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) {
551 		if (!vgdev->has_resource_assign_uuid)
552 			return -EINVAL;
553 	}
554 
555 	switch (rc_blob->blob_mem) {
556 	case VIRTGPU_BLOB_MEM_GUEST:
557 		*guest_blob = true;
558 		break;
559 	case VIRTGPU_BLOB_MEM_HOST3D_GUEST:
560 		*guest_blob = true;
561 		fallthrough;
562 	case VIRTGPU_BLOB_MEM_HOST3D:
563 		*host3d_blob = true;
564 		break;
565 	default:
566 		return -EINVAL;
567 	}
568 
569 	if (*host3d_blob) {
570 		if (!vgdev->has_virgl_3d)
571 			return -EINVAL;
572 
573 		/* Must be dword aligned. */
574 		if (rc_blob->cmd_size % 4 != 0)
575 			return -EINVAL;
576 
577 		params->ctx_id = vfpriv->ctx_id;
578 		params->blob_id = rc_blob->blob_id;
579 	} else {
580 		if (rc_blob->blob_id != 0)
581 			return -EINVAL;
582 
583 		if (rc_blob->cmd_size != 0)
584 			return -EINVAL;
585 	}
586 
587 	params->blob_mem = rc_blob->blob_mem;
588 	params->size = rc_blob->size;
589 	params->blob = true;
590 	params->blob_flags = rc_blob->blob_flags;
591 	return 0;
592 }
593 
594 static int virtio_gpu_resource_create_blob_ioctl(struct drm_device *dev,
595 						 void *data,
596 						 struct drm_file *file)
597 {
598 	int ret = 0;
599 	uint32_t handle = 0;
600 	bool guest_blob = false;
601 	bool host3d_blob = false;
602 	struct drm_gem_object *obj;
603 	struct virtio_gpu_object *bo;
604 	struct virtio_gpu_object_params params = { 0 };
605 	struct virtio_gpu_device *vgdev = dev->dev_private;
606 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
607 	struct drm_virtgpu_resource_create_blob *rc_blob = data;
608 
609 	if (verify_blob(vgdev, vfpriv, &params, rc_blob,
610 			&guest_blob, &host3d_blob))
611 		return -EINVAL;
612 
613 	if (vgdev->has_virgl_3d)
614 		virtio_gpu_create_context(dev, file);
615 
616 	if (rc_blob->cmd_size) {
617 		void *buf;
618 
619 		buf = memdup_user(u64_to_user_ptr(rc_blob->cmd),
620 				  rc_blob->cmd_size);
621 
622 		if (IS_ERR(buf))
623 			return PTR_ERR(buf);
624 
625 		virtio_gpu_cmd_submit(vgdev, buf, rc_blob->cmd_size,
626 				      vfpriv->ctx_id, NULL, NULL);
627 	}
628 
629 	if (guest_blob)
630 		ret = virtio_gpu_object_create(vgdev, &params, &bo, NULL);
631 	else if (!guest_blob && host3d_blob)
632 		ret = virtio_gpu_vram_create(vgdev, &params, &bo);
633 	else
634 		return -EINVAL;
635 
636 	if (ret < 0)
637 		return ret;
638 
639 	bo->guest_blob = guest_blob;
640 	bo->host3d_blob = host3d_blob;
641 	bo->blob_mem = rc_blob->blob_mem;
642 	bo->blob_flags = rc_blob->blob_flags;
643 
644 	obj = &bo->base.base;
645 	if (params.blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) {
646 		ret = virtio_gpu_resource_assign_uuid(vgdev, bo);
647 		if (ret) {
648 			drm_gem_object_release(obj);
649 			return ret;
650 		}
651 	}
652 
653 	ret = drm_gem_handle_create(file, obj, &handle);
654 	if (ret) {
655 		drm_gem_object_release(obj);
656 		return ret;
657 	}
658 	drm_gem_object_put(obj);
659 
660 	rc_blob->res_handle = bo->hw_res_handle;
661 	rc_blob->bo_handle = handle;
662 
663 	return 0;
664 }
665 
666 struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
667 	DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
668 			  DRM_RENDER_ALLOW),
669 
670 	DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
671 			  DRM_RENDER_ALLOW),
672 
673 	DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
674 			  DRM_RENDER_ALLOW),
675 
676 	DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
677 			  virtio_gpu_resource_create_ioctl,
678 			  DRM_RENDER_ALLOW),
679 
680 	DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
681 			  DRM_RENDER_ALLOW),
682 
683 	/* make transfer async to the main ring? - no sure, can we
684 	 * thread these in the underlying GL
685 	 */
686 	DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
687 			  virtio_gpu_transfer_from_host_ioctl,
688 			  DRM_RENDER_ALLOW),
689 	DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
690 			  virtio_gpu_transfer_to_host_ioctl,
691 			  DRM_RENDER_ALLOW),
692 
693 	DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
694 			  DRM_RENDER_ALLOW),
695 
696 	DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
697 			  DRM_RENDER_ALLOW),
698 
699 	DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE_BLOB,
700 			  virtio_gpu_resource_create_blob_ioctl,
701 			  DRM_RENDER_ALLOW),
702 };
703