drivers/gpu/drm/virtio/virtgpu_ioctl.c

   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
  33 static 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
  44 static 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
  55 static 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
  79 static 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 static int virtio_gpu_execbuffer(struct drm_device *dev,
  93                                  struct drm_virtgpu_execbuffer *exbuf,
  94                                  struct drm_file *drm_file)
  95 {
  96         struct virtio_gpu_device *vgdev = dev->dev_private;
  97         struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
  98         struct drm_gem_object *gobj;
  99         struct virtio_gpu_fence *fence;
 100         struct virtio_gpu_object *qobj;
 101         int ret;
 102         uint32_t *bo_handles = NULL;
 103         void __user *user_bo_handles = NULL;
 104         struct list_head validate_list;
 105         struct ttm_validate_buffer *buflist = NULL;
 106         int i;
 107         struct ww_acquire_ctx ticket;
 108         void *buf;
 109
 110         if (vgdev->has_virgl_3d == false)
 111                 return -ENOSYS;
 112
 113         INIT_LIST_HEAD(&validate_list);
 114         if (exbuf->num_bo_handles) {
 115
 116                 bo_handles = drm_malloc_ab(exbuf->num_bo_handles,
 117                                            sizeof(uint32_t));
 118                 buflist = drm_calloc_large(exbuf->num_bo_handles,
 119                                            sizeof(struct ttm_validate_buffer));
 120                 if (!bo_handles || !buflist) {
 121                         drm_free_large(bo_handles);
 122                         drm_free_large(buflist);
 123                         return -ENOMEM;
 124                 }
 125
 126                 user_bo_handles = (void __user *)(uintptr_t)exbuf->bo_handles;
 127                 if (copy_from_user(bo_handles, user_bo_handles,
 128                                    exbuf->num_bo_handles * sizeof(uint32_t))) {
 129                         ret = -EFAULT;
 130                         drm_free_large(bo_handles);
 131                         drm_free_large(buflist);
 132                         return ret;
 133                 }
 134
 135                 for (i = 0; i < exbuf->num_bo_handles; i++) {
 136                         gobj = drm_gem_object_lookup(dev,
 137                                                      drm_file, bo_handles[i]);
 138                         if (!gobj) {
 139                                 drm_free_large(bo_handles);
 140                                 drm_free_large(buflist);
 141                                 return -ENOENT;
 142                         }
 143
 144                         qobj = gem_to_virtio_gpu_obj(gobj);
 145                         buflist[i].bo = &qobj->tbo;
 146
 147                         list_add(&buflist[i].head, &validate_list);
 148                 }
 149                 drm_free_large(bo_handles);
 150         }
 151
 152         ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
 153         if (ret)
 154                 goto out_free;
 155
 156         buf = kmalloc(exbuf->size, GFP_KERNEL);
 157         if (!buf) {
 158                 ret = -ENOMEM;
 159                 goto out_unresv;
 160         }
 161         if (copy_from_user(buf, (void __user *)(uintptr_t)exbuf->command,
 162                            exbuf->size)) {
 163                 kfree(buf);
 164                 ret = -EFAULT;
 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         fence_put(&fence->f);
 176         return 0;
 177
 178 out_unresv:
 179         ttm_eu_backoff_reservation(&ticket, &validate_list);
 180 out_free:
 181         virtio_gpu_unref_list(&validate_list);
 182         drm_free_large(buflist);
 183         return ret;
 184 }
 185
 186 /*
 187  * Usage of execbuffer:
 188  * Relocations need to take into account the full VIRTIO_GPUDrawable size.
 189  * However, the command as passed from user space must *not* contain the initial
 190  * VIRTIO_GPUReleaseInfo struct (first XXX bytes)
 191  */
 192 static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 193                                        struct drm_file *file_priv)
 194 {
 195         struct drm_virtgpu_execbuffer *execbuffer = data;
 196         return virtio_gpu_execbuffer(dev, execbuffer, file_priv);
 197 }
 198
 199
 200 static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
 201                                      struct drm_file *file_priv)
 202 {
 203         struct virtio_gpu_device *vgdev = dev->dev_private;
 204         struct drm_virtgpu_getparam *param = data;
 205         int value;
 206
 207         switch (param->param) {
 208         case VIRTGPU_PARAM_3D_FEATURES:
 209                 value = vgdev->has_virgl_3d == true ? 1 : 0;
 210                 break;
 211         default:
 212                 return -EINVAL;
 213         }
 214         if (copy_to_user((void __user *)(unsigned long)param->value,
 215                          &value, sizeof(int))) {
 216                 return -EFAULT;
 217         }
 218         return 0;
 219 }
 220
 221 static int virtio_gpu_resource_create_ioctl(struct drm_device *dev, void *data,
 222                                             struct drm_file *file_priv)
 223 {
 224         struct virtio_gpu_device *vgdev = dev->dev_private;
 225         struct drm_virtgpu_resource_create *rc = data;
 226         int ret;
 227         uint32_t res_id;
 228         struct virtio_gpu_object *qobj;
 229         struct drm_gem_object *obj;
 230         uint32_t handle = 0;
 231         uint32_t size;
 232         struct list_head validate_list;
 233         struct ttm_validate_buffer mainbuf;
 234         struct virtio_gpu_fence *fence = NULL;
 235         struct ww_acquire_ctx ticket;
 236         struct virtio_gpu_resource_create_3d rc_3d;
 237
 238         if (vgdev->has_virgl_3d == false) {
 239                 if (rc->depth > 1)
 240                         return -EINVAL;
 241                 if (rc->nr_samples > 1)
 242                         return -EINVAL;
 243                 if (rc->last_level > 1)
 244                         return -EINVAL;
 245                 if (rc->target != 2)
 246                         return -EINVAL;
 247                 if (rc->array_size > 1)
 248                         return -EINVAL;
 249         }
 250
 251         INIT_LIST_HEAD(&validate_list);
 252         memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
 253
 254         virtio_gpu_resource_id_get(vgdev, &res_id);
 255
 256         size = rc->size;
 257
 258         /* allocate a single page size object */
 259         if (size == 0)
 260                 size = PAGE_SIZE;
 261
 262         qobj = virtio_gpu_alloc_object(dev, size, false, false);
 263         if (IS_ERR(qobj)) {
 264                 ret = PTR_ERR(qobj);
 265                 goto fail_id;
 266         }
 267         obj = &qobj->gem_base;
 268
 269         if (!vgdev->has_virgl_3d) {
 270                 virtio_gpu_cmd_create_resource(vgdev, res_id, rc->format,
 271                                                rc->width, rc->height);
 272
 273                 ret = virtio_gpu_object_attach(vgdev, qobj, res_id, NULL);
 274         } else {
 275                 /* use a gem reference since unref list undoes them */
 276                 drm_gem_object_reference(&qobj->gem_base);
 277                 mainbuf.bo = &qobj->tbo;
 278                 list_add(&mainbuf.head, &validate_list);
 279
 280                 ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
 281                 if (ret) {
 282                         DRM_DEBUG("failed to validate\n");
 283                         goto fail_unref;
 284                 }
 285
 286                 rc_3d.resource_id = cpu_to_le32(res_id);
 287                 rc_3d.target = cpu_to_le32(rc->target);
 288                 rc_3d.format = cpu_to_le32(rc->format);
 289                 rc_3d.bind = cpu_to_le32(rc->bind);
 290                 rc_3d.width = cpu_to_le32(rc->width);
 291                 rc_3d.height = cpu_to_le32(rc->height);
 292                 rc_3d.depth = cpu_to_le32(rc->depth);
 293                 rc_3d.array_size = cpu_to_le32(rc->array_size);
 294                 rc_3d.last_level = cpu_to_le32(rc->last_level);
 295                 rc_3d.nr_samples = cpu_to_le32(rc->nr_samples);
 296                 rc_3d.flags = cpu_to_le32(rc->flags);
 297
 298                 virtio_gpu_cmd_resource_create_3d(vgdev, &rc_3d, NULL);
 299                 ret = virtio_gpu_object_attach(vgdev, qobj, res_id, &fence);
 300                 if (ret) {
 301                         ttm_eu_backoff_reservation(&ticket, &validate_list);
 302                         goto fail_unref;
 303                 }
 304                 ttm_eu_fence_buffer_objects(&ticket, &validate_list, &fence->f);
 305         }
 306
 307         qobj->hw_res_handle = res_id;
 308
 309         ret = drm_gem_handle_create(file_priv, obj, &handle);
 310         if (ret) {
 311
 312                 drm_gem_object_release(obj);
 313                 if (vgdev->has_virgl_3d) {
 314                         virtio_gpu_unref_list(&validate_list);
 315                         fence_put(&fence->f);
 316                 }
 317                 return ret;
 318         }
 319         drm_gem_object_unreference_unlocked(obj);
 320
 321         rc->res_handle = res_id; /* similiar to a VM address */
 322         rc->bo_handle = handle;
 323
 324         if (vgdev->has_virgl_3d) {
 325                 virtio_gpu_unref_list(&validate_list);
 326                 fence_put(&fence->f);
 327         }
 328         return 0;
 329 fail_unref:
 330         if (vgdev->has_virgl_3d) {
 331                 virtio_gpu_unref_list(&validate_list);
 332                 fence_put(&fence->f);
 333         }
 334 //fail_obj:
 335 //      drm_gem_object_handle_unreference_unlocked(obj);
 336 fail_id:
 337         virtio_gpu_resource_id_put(vgdev, res_id);
 338         return ret;
 339 }
 340
 341 static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
 342                                           struct drm_file *file_priv)
 343 {
 344         struct drm_virtgpu_resource_info *ri = data;
 345         struct drm_gem_object *gobj = NULL;
 346         struct virtio_gpu_object *qobj = NULL;
 347
 348         gobj = drm_gem_object_lookup(dev, file_priv, ri->bo_handle);
 349         if (gobj == NULL)
 350                 return -ENOENT;
 351
 352         qobj = gem_to_virtio_gpu_obj(gobj);
 353
 354         ri->size = qobj->gem_base.size;
 355         ri->res_handle = qobj->hw_res_handle;
 356         drm_gem_object_unreference_unlocked(gobj);
 357         return 0;
 358 }
 359
 360 static int virtio_gpu_transfer_from_host_ioctl(struct drm_device *dev,
 361                                                void *data,
 362                                                struct drm_file *file)
 363 {
 364         struct virtio_gpu_device *vgdev = dev->dev_private;
 365         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 366         struct drm_virtgpu_3d_transfer_from_host *args = data;
 367         struct drm_gem_object *gobj = NULL;
 368         struct virtio_gpu_object *qobj = NULL;
 369         struct virtio_gpu_fence *fence;
 370         int ret;
 371         u32 offset = args->offset;
 372         struct virtio_gpu_box box;
 373
 374         if (vgdev->has_virgl_3d == false)
 375                 return -ENOSYS;
 376
 377         gobj = drm_gem_object_lookup(dev, file, args->bo_handle);
 378         if (gobj == NULL)
 379                 return -ENOENT;
 380
 381         qobj = gem_to_virtio_gpu_obj(gobj);
 382
 383         ret = virtio_gpu_object_reserve(qobj, false);
 384         if (ret)
 385                 goto out;
 386
 387         ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 388                               true, false);
 389         if (unlikely(ret))
 390                 goto out_unres;
 391
 392         convert_to_hw_box(&box, &args->box);
 393         virtio_gpu_cmd_transfer_from_host_3d
 394                 (vgdev, qobj->hw_res_handle,
 395                  vfpriv->ctx_id, offset, args->level,
 396                  &box, &fence);
 397         reservation_object_add_excl_fence(qobj->tbo.resv,
 398                                           &fence->f);
 399
 400         fence_put(&fence->f);
 401 out_unres:
 402         virtio_gpu_object_unreserve(qobj);
 403 out:
 404         drm_gem_object_unreference_unlocked(gobj);
 405         return ret;
 406 }
 407
 408 static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
 409                                              struct drm_file *file)
 410 {
 411         struct virtio_gpu_device *vgdev = dev->dev_private;
 412         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 413         struct drm_virtgpu_3d_transfer_to_host *args = data;
 414         struct drm_gem_object *gobj = NULL;
 415         struct virtio_gpu_object *qobj = NULL;
 416         struct virtio_gpu_fence *fence;
 417         struct virtio_gpu_box box;
 418         int ret;
 419         u32 offset = args->offset;
 420
 421         gobj = drm_gem_object_lookup(dev, file, args->bo_handle);
 422         if (gobj == NULL)
 423                 return -ENOENT;
 424
 425         qobj = gem_to_virtio_gpu_obj(gobj);
 426
 427         ret = virtio_gpu_object_reserve(qobj, false);
 428         if (ret)
 429                 goto out;
 430
 431         ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 432                               true, false);
 433         if (unlikely(ret))
 434                 goto out_unres;
 435
 436         convert_to_hw_box(&box, &args->box);
 437         if (!vgdev->has_virgl_3d) {
 438                 virtio_gpu_cmd_transfer_to_host_2d
 439                         (vgdev, qobj->hw_res_handle, offset,
 440                          box.w, box.h, box.x, box.y, NULL);
 441         } else {
 442                 virtio_gpu_cmd_transfer_to_host_3d
 443                         (vgdev, qobj->hw_res_handle,
 444                          vfpriv ? vfpriv->ctx_id : 0, offset,
 445                          args->level, &box, &fence);
 446                 reservation_object_add_excl_fence(qobj->tbo.resv,
 447                                                   &fence->f);
 448                 fence_put(&fence->f);
 449         }
 450
 451 out_unres:
 452         virtio_gpu_object_unreserve(qobj);
 453 out:
 454         drm_gem_object_unreference_unlocked(gobj);
 455         return ret;
 456 }
 457
 458 static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
 459                             struct drm_file *file)
 460 {
 461         struct drm_virtgpu_3d_wait *args = data;
 462         struct drm_gem_object *gobj = NULL;
 463         struct virtio_gpu_object *qobj = NULL;
 464         int ret;
 465         bool nowait = false;
 466
 467         gobj = drm_gem_object_lookup(dev, file, args->handle);
 468         if (gobj == NULL)
 469                 return -ENOENT;
 470
 471         qobj = gem_to_virtio_gpu_obj(gobj);
 472
 473         if (args->flags & VIRTGPU_WAIT_NOWAIT)
 474                 nowait = true;
 475         ret = virtio_gpu_object_wait(qobj, nowait);
 476
 477         drm_gem_object_unreference_unlocked(gobj);
 478         return ret;
 479 }
 480
 481 static int virtio_gpu_get_caps_ioctl(struct drm_device *dev,
 482                                 void *data, struct drm_file *file)
 483 {
 484         struct virtio_gpu_device *vgdev = dev->dev_private;
 485         struct drm_virtgpu_get_caps *args = data;
 486         int size;
 487         int i;
 488         int found_valid = -1;
 489         int ret;
 490         struct virtio_gpu_drv_cap_cache *cache_ent;
 491         void *ptr;
 492         if (vgdev->num_capsets == 0)
 493                 return -ENOSYS;
 494
 495         spin_lock(&vgdev->display_info_lock);
 496         for (i = 0; i < vgdev->num_capsets; i++) {
 497                 if (vgdev->capsets[i].id == args->cap_set_id) {
 498                         if (vgdev->capsets[i].max_version >= args->cap_set_ver) {
 499                                 found_valid = i;
 500                                 break;
 501                         }
 502                 }
 503         }
 504
 505         if (found_valid == -1) {
 506                 spin_unlock(&vgdev->display_info_lock);
 507                 return -EINVAL;
 508         }
 509
 510         size = vgdev->capsets[found_valid].max_size;
 511         if (args->size > size) {
 512                 spin_unlock(&vgdev->display_info_lock);
 513                 return -EINVAL;
 514         }
 515
 516         list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
 517                 if (cache_ent->id == args->cap_set_id &&
 518                     cache_ent->version == args->cap_set_ver) {
 519                         ptr = cache_ent->caps_cache;
 520                         spin_unlock(&vgdev->display_info_lock);
 521                         goto copy_exit;
 522                 }
 523         }
 524         spin_unlock(&vgdev->display_info_lock);
 525
 526         /* not in cache - need to talk to hw */
 527         virtio_gpu_cmd_get_capset(vgdev, found_valid, args->cap_set_ver,
 528                                   &cache_ent);
 529
 530         ret = wait_event_timeout(vgdev->resp_wq,
 531                                  atomic_read(&cache_ent->is_valid), 5 * HZ);
 532
 533         ptr = cache_ent->caps_cache;
 534
 535 copy_exit:
 536         if (copy_to_user((void __user *)(unsigned long)args->addr, ptr, size))
 537                 return -EFAULT;
 538
 539         return 0;
 540 }
 541
 542 struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
 543         DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
 544                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 545
 546         DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
 547                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 548
 549         DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
 550                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 551
 552         DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
 553                           virtio_gpu_resource_create_ioctl,
 554                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 555
 556         DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
 557                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 558
 559         /* make transfer async to the main ring? - no sure, can we
 560            thread these in the underlying GL */
 561         DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
 562                           virtio_gpu_transfer_from_host_ioctl,
 563                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 564         DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
 565                           virtio_gpu_transfer_to_host_ioctl,
 566                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 567
 568         DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
 569                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 570
 571         DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
 572                           DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
 573 };