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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 <drm/drmP.h>
29#include "virtgpu_drv.h"
30#include <drm/virtgpu_drm.h>
31#include "ttm/ttm_execbuf_util.h"
32
33static void convert_to_hw_box(struct virtio_gpu_box *dst,
34 const struct drm_virtgpu_3d_box *src)
35{
36 dst->x = cpu_to_le32(src->x);
37 dst->y = cpu_to_le32(src->y);
38 dst->z = cpu_to_le32(src->z);
39 dst->w = cpu_to_le32(src->w);
40 dst->h = cpu_to_le32(src->h);
41 dst->d = cpu_to_le32(src->d);
42}
43
44static int virtio_gpu_map_ioctl(struct drm_device *dev, void *data,
45 struct drm_file *file_priv)
46{
47 struct virtio_gpu_device *vgdev = dev->dev_private;
48 struct drm_virtgpu_map *virtio_gpu_map = data;
49
50 return virtio_gpu_mode_dumb_mmap(file_priv, vgdev->ddev,
51 virtio_gpu_map->handle,
52 &virtio_gpu_map->offset);
53}
54
55static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
56 struct list_head *head)
57{
58 struct ttm_validate_buffer *buf;
59 struct ttm_buffer_object *bo;
60 struct virtio_gpu_object *qobj;
61 int ret;
62
63 ret = ttm_eu_reserve_buffers(ticket, head, true, NULL);
64 if (ret != 0)
65 return ret;
66
67 list_for_each_entry(buf, head, head) {
68 bo = buf->bo;
69 qobj = container_of(bo, struct virtio_gpu_object, tbo);
70 ret = ttm_bo_validate(bo, &qobj->placement, false, false);
71 if (ret) {
72 ttm_eu_backoff_reservation(ticket, head);
73 return ret;
74 }
75 }
76 return 0;
77}
78
79static void virtio_gpu_unref_list(struct list_head *head)
80{
81 struct ttm_validate_buffer *buf;
82 struct ttm_buffer_object *bo;
83 struct virtio_gpu_object *qobj;
84 list_for_each_entry(buf, head, head) {
85 bo = buf->bo;
86 qobj = container_of(bo, struct virtio_gpu_object, tbo);
87
88 drm_gem_object_unreference_unlocked(&qobj->gem_base);
89 }
90}
91
92/*
93 * Usage of execbuffer:
94 * Relocations need to take into account the full VIRTIO_GPUDrawable size.
95 * However, the command as passed from user space must *not* contain the initial
96 * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
97 */
98static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
99 struct drm_file *drm_file)
100{
101 struct drm_virtgpu_execbuffer *exbuf = data;
102 struct virtio_gpu_device *vgdev = dev->dev_private;
103 struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
104 struct drm_gem_object *gobj;
105 struct virtio_gpu_fence *fence;
106 struct virtio_gpu_object *qobj;
107 int ret;
108 uint32_t *bo_handles = NULL;
109 void __user *user_bo_handles = NULL;
110 struct list_head validate_list;
111 struct ttm_validate_buffer *buflist = NULL;
112 int i;
113 struct ww_acquire_ctx ticket;
114 void *buf;
115
116 if (vgdev->has_virgl_3d == false)
117 return -ENOSYS;
118
119 INIT_LIST_HEAD(&validate_list);
120 if (exbuf->num_bo_handles) {
121
122 bo_handles = drm_malloc_ab(exbuf->num_bo_handles,
123 sizeof(uint32_t));
124 buflist = drm_calloc_large(exbuf->num_bo_handles,
125 sizeof(struct ttm_validate_buffer));
126 if (!bo_handles || !buflist) {
127 drm_free_large(bo_handles);
128 drm_free_large(buflist);
129 return -ENOMEM;
130 }
131
132 user_bo_handles = (void __user *)(uintptr_t)exbuf->bo_handles;
133 if (copy_from_user(bo_handles, user_bo_handles,
134 exbuf->num_bo_handles * sizeof(uint32_t))) {
135 ret = -EFAULT;
136 drm_free_large(bo_handles);
137 drm_free_large(buflist);
138 return ret;
139 }
140
141 for (i = 0; i < exbuf->num_bo_handles; i++) {
142 gobj = drm_gem_object_lookup(drm_file, bo_handles[i]);
143 if (!gobj) {
144 drm_free_large(bo_handles);
145 drm_free_large(buflist);
146 return -ENOENT;
147 }
148
149 qobj = gem_to_virtio_gpu_obj(gobj);
150 buflist[i].bo = &qobj->tbo;
151
152 list_add(&buflist[i].head, &validate_list);
153 }
154 drm_free_large(bo_handles);
155 }
156
157 ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
158 if (ret)
159 goto out_free;
160
161 buf = memdup_user((void __user *)(uintptr_t)exbuf->command,
162 exbuf->size);
163 if (IS_ERR(buf)) {
164 ret = PTR_ERR(buf);
165 goto out_unresv;
166 }
167 virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
168 vfpriv->ctx_id, &fence);
169
170 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
171
172 /* fence the command bo */
173 virtio_gpu_unref_list(&validate_list);
174 drm_free_large(buflist);
175 dma_fence_put(&fence->f);
176 return 0;
177
178out_unresv:
179 ttm_eu_backoff_reservation(&ticket, &validate_list);
180out_free:
181 virtio_gpu_unref_list(&validate_list);
182 drm_free_large(buflist);
183 return ret;
184}
185
186static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
187 struct drm_file *file_priv)
188{
189 struct virtio_gpu_device *vgdev = dev->dev_private;
190 struct drm_virtgpu_getparam *param = data;
191 int value;
192
193 switch (param->param) {
194 case VIRTGPU_PARAM_3D_FEATURES:
195 value = vgdev->has_virgl_3d == true ? 1 : 0;
196 break;
197 default:
198 return -EINVAL;
199 }
200 if (copy_to_user((void __user *)(unsigned long)param->value,
201 &value, sizeof(int))) {
202 return -EFAULT;
203 }
204 return 0;
205}
206
207static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
208 struct drm_file *file_priv)
209{
210 struct virtio_gpu_device *vgdev = dev->dev_private;
211 struct drm_virtgpu_resource_create *rc = data;
212 int ret;
213 uint32_t res_id;
214 struct virtio_gpu_object *qobj;
215 struct drm_gem_object *obj;
216 uint32_t handle = 0;
217 uint32_t size;
218 struct list_head validate_list;
219 struct ttm_validate_buffer mainbuf;
220 struct virtio_gpu_fence *fence = NULL;
221 struct ww_acquire_ctx ticket;
222 struct virtio_gpu_resource_create_3d rc_3d;
223
224 if (vgdev->has_virgl_3d == false) {
225 if (rc->depth > 1)
226 return -EINVAL;
227 if (rc->nr_samples > 1)
228 return -EINVAL;
229 if (rc->last_level > 1)
230 return -EINVAL;
231 if (rc->target != 2)
232 return -EINVAL;
233 if (rc->array_size > 1)
234 return -EINVAL;
235 }
236
237 INIT_LIST_HEAD(&validate_list);
238 memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
239
240 virtio_gpu_resource_id_get(vgdev, &res_id);
241
242 size = rc->size;
243
244 /* allocate a single page size object */
245 if (size == 0)
246 size = PAGE_SIZE;
247
248 qobj = virtio_gpu_alloc_object(dev, size, false, false);
249 if (IS_ERR(qobj)) {
250 ret = PTR_ERR(qobj);
251 goto fail_id;
252 }
253 obj = &qobj->gem_base;
254
255 if (!vgdev->has_virgl_3d) {
256 virtio_gpu_cmd_create_resource(vgdev, res_id, rc->format,
257 rc->width, rc->height);
258
259 ret = virtio_gpu_object_attach(vgdev, qobj, res_id, NULL);
260 } else {
261 /* use a gem reference since unref list undoes them */
262 drm_gem_object_reference(&qobj->gem_base);
263 mainbuf.bo = &qobj->tbo;
264 list_add(&mainbuf.head, &validate_list);
265
266 ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
267 if (ret) {
268 DRM_DEBUG("failed to validate\n");
269 goto fail_unref;
270 }
271
272 rc_3d.resource_id = cpu_to_le32(res_id);
273 rc_3d.target = cpu_to_le32(rc->target);
274 rc_3d.format = cpu_to_le32(rc->format);
275 rc_3d.bind = cpu_to_le32(rc->bind);
276 rc_3d.width = cpu_to_le32(rc->width);
277 rc_3d.height = cpu_to_le32(rc->height);
278 rc_3d.depth = cpu_to_le32(rc->depth);
279 rc_3d.array_size = cpu_to_le32(rc->array_size);
280 rc_3d.last_level = cpu_to_le32(rc->last_level);
281 rc_3d.nr_samples = cpu_to_le32(rc->nr_samples);
282 rc_3d.flags = cpu_to_le32(rc->flags);
283
284 virtio_gpu_cmd_resource_create_3d(vgdev, &rc_3d, NULL);
285 ret = virtio_gpu_object_attach(vgdev, qobj, res_id, &fence);
286 if (ret) {
287 ttm_eu_backoff_reservation(&ticket, &validate_list);
288 goto fail_unref;
289 }
290 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
291 }
292
293 qobj->hw_res_handle = res_id;
294
295 ret = drm_gem_handle_create(file_priv, obj, &handle);
296 if (ret) {
297
298 drm_gem_object_release(obj);
299 if (vgdev->has_virgl_3d) {
300 virtio_gpu_unref_list(&validate_list);
301 dma_fence_put(&fence->f);
302 }
303 return ret;
304 }
305 drm_gem_object_unreference_unlocked(obj);
306
307 rc->res_handle = res_id; /* similiar to a VM address */
308 rc->bo_handle = handle;
309
310 if (vgdev->has_virgl_3d) {
311 virtio_gpu_unref_list(&validate_list);
312 dma_fence_put(&fence->f);
313 }
314 return 0;
315fail_unref:
316 if (vgdev->has_virgl_3d) {
317 virtio_gpu_unref_list(&validate_list);
318 dma_fence_put(&fence->f);
319 }
320//fail_obj:
321// drm_gem_object_handle_unreference_unlocked(obj);
322fail_id:
323 virtio_gpu_resource_id_put(vgdev, res_id);
324 return ret;
325}
326
327static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
328 struct drm_file *file_priv)
329{
330 struct drm_virtgpu_resource_info *ri = data;
331 struct drm_gem_object *gobj = NULL;
332 struct virtio_gpu_object *qobj = NULL;
333
334 gobj = drm_gem_object_lookup(file_priv, ri->bo_handle);
335 if (gobj == NULL)
336 return -ENOENT;
337
338 qobj = gem_to_virtio_gpu_obj(gobj);
339
340 ri->size = qobj->gem_base.size;
341 ri->res_handle = qobj->hw_res_handle;
342 drm_gem_object_unreference_unlocked(gobj);
343 return 0;
344}
345
346static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
347 void *data,
348 struct drm_file *file)
349{
350 struct virtio_gpu_device *vgdev = dev->dev_private;
351 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
352 struct drm_virtgpu_3d_transfer_from_host *args = data;
353 struct drm_gem_object *gobj = NULL;
354 struct virtio_gpu_object *qobj = NULL;
355 struct virtio_gpu_fence *fence;
356 int ret;
357 u32 offset = args->offset;
358 struct virtio_gpu_box box;
359
360 if (vgdev->has_virgl_3d == false)
361 return -ENOSYS;
362
363 gobj = drm_gem_object_lookup(file, args->bo_handle);
364 if (gobj == NULL)
365 return -ENOENT;
366
367 qobj = gem_to_virtio_gpu_obj(gobj);
368
369 ret = virtio_gpu_object_reserve(qobj, false);
370 if (ret)
371 goto out;
372
373 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
374 true, false);
375 if (unlikely(ret))
376 goto out_unres;
377
378 convert_to_hw_box(&box, &args->box);
379 virtio_gpu_cmd_transfer_from_host_3d
380 (vgdev, qobj->hw_res_handle,
381 vfpriv->ctx_id, offset, args->level,
382 &box, &fence);
383 reservation_object_add_excl_fence(qobj->tbo.resv,
384 &fence->f);
385
386 dma_fence_put(&fence->f);
387out_unres:
388 virtio_gpu_object_unreserve(qobj);
389out:
390 drm_gem_object_unreference_unlocked(gobj);
391 return ret;
392}
393
394static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
395 struct drm_file *file)
396{
397 struct virtio_gpu_device *vgdev = dev->dev_private;
398 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
399 struct drm_virtgpu_3d_transfer_to_host *args = data;
400 struct drm_gem_object *gobj = NULL;
401 struct virtio_gpu_object *qobj = NULL;
402 struct virtio_gpu_fence *fence;
403 struct virtio_gpu_box box;
404 int ret;
405 u32 offset = args->offset;
406
407 gobj = drm_gem_object_lookup(file, args->bo_handle);
408 if (gobj == NULL)
409 return -ENOENT;
410
411 qobj = gem_to_virtio_gpu_obj(gobj);
412
413 ret = virtio_gpu_object_reserve(qobj, false);
414 if (ret)
415 goto out;
416
417 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
418 true, false);
419 if (unlikely(ret))
420 goto out_unres;
421
422 convert_to_hw_box(&box, &args->box);
423 if (!vgdev->has_virgl_3d) {
424 virtio_gpu_cmd_transfer_to_host_2d
425 (vgdev, qobj->hw_res_handle, offset,
426 box.w, box.h, box.x, box.y, NULL);
427 } else {
428 virtio_gpu_cmd_transfer_to_host_3d
429 (vgdev, qobj->hw_res_handle,
430 vfpriv ? vfpriv->ctx_id : 0, offset,
431 args->level, &box, &fence);
432 reservation_object_add_excl_fence(qobj->tbo.resv,
433 &fence->f);
434 dma_fence_put(&fence->f);
435 }
436
437out_unres:
438 virtio_gpu_object_unreserve(qobj);
439out:
440 drm_gem_object_unreference_unlocked(gobj);
441 return ret;
442}
443
444static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
445 struct drm_file *file)
446{
447 struct drm_virtgpu_3d_wait *args = data;
448 struct drm_gem_object *gobj = NULL;
449 struct virtio_gpu_object *qobj = NULL;
450 int ret;
451 bool nowait = false;
452
453 gobj = drm_gem_object_lookup(file, args->handle);
454 if (gobj == NULL)
455 return -ENOENT;
456
457 qobj = gem_to_virtio_gpu_obj(gobj);
458
459 if (args->flags & VIRTGPU_WAIT_NOWAIT)
460 nowait = true;
461 ret = virtio_gpu_object_wait(qobj, nowait);
462
463 drm_gem_object_unreference_unlocked(gobj);
464 return ret;
465}
466
467static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
468 void *data, struct drm_file *file)
469{
470 struct virtio_gpu_device *vgdev = dev->dev_private;
471 struct drm_virtgpu_get_caps *args = data;
472 int size;
473 int i;
474 int found_valid = -1;
475 int ret;
476 struct virtio_gpu_drv_cap_cache *cache_ent;
477 void *ptr;
478 if (vgdev->num_capsets == 0)
479 return -ENOSYS;
480
481 spin_lock(&vgdev->display_info_lock);
482 for (i = 0; i < vgdev->num_capsets; i++) {
483 if (vgdev->capsets[i].id == args->cap_set_id) {
484 if (vgdev->capsets[i].max_version >= args->cap_set_ver) {
485 found_valid = i;
486 break;
487 }
488 }
489 }
490
491 if (found_valid == -1) {
492 spin_unlock(&vgdev->display_info_lock);
493 return -EINVAL;
494 }
495
496 size = vgdev->capsets[found_valid].max_size;
497 if (args->size > size) {
498 spin_unlock(&vgdev->display_info_lock);
499 return -EINVAL;
500 }
501
502 list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
503 if (cache_ent->id == args->cap_set_id &&
504 cache_ent->version == args->cap_set_ver) {
505 ptr = cache_ent->caps_cache;
506 spin_unlock(&vgdev->display_info_lock);
507 goto copy_exit;
508 }
509 }
510 spin_unlock(&vgdev->display_info_lock);
511
512 /* not in cache - need to talk to hw */
513 virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
514 &cache_ent);
515
516 ret = wait_event_timeout(vgdev->resp_wq,
517 atomic_read(&cache_ent->is_valid), 5 * HZ);
518
519 ptr = cache_ent->caps_cache;
520
521copy_exit:
522 if (copy_to_user((void __user *)(unsigned long)args->addr, ptr, size))
523 return -EFAULT;
524
525 return 0;
526}
527
528struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
529 DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
530 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
531
532 DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
533 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
534
535 DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
536 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
537
538 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
539 virtio_gpu_resource_create_ioctl,
540 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
541
542 DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
543 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
544
545 /* make transfer async to the main ring? - no sure, can we
546 thread these in the underlying GL */
547 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
548 virtio_gpu_transfer_from_host_ioctl,
549 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
550 DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
551 virtio_gpu_transfer_to_host_ioctl,
552 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
553
554 DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
555 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
556
557 DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
558 DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
559};