drivers/gpu/drm/radeon/radeon_gem.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  */
  28 #include <drm/drmP.h>
  29 #include <drm/radeon_drm.h>
  30 #include "radeon.h"
  31
  32 int radeon_gem_object_init(struct drm_gem_object *obj)
  33 {
  34         BUG();
  35
  36         return 0;
  37 }
  38
  39 void radeon_gem_object_free(struct drm_gem_object *gobj)
  40 {
  41         struct radeon_bo *robj = gem_to_radeon_bo(gobj);
  42
  43         if (robj) {
  44                 if (robj->gem_base.import_attach)
  45                         drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
  46                 radeon_bo_unref(&robj);
  47         }
  48 }
  49
  50 int radeon_gem_object_create(struct radeon_device *rdev, int size,
  51                                 int alignment, int initial_domain,
  52                                 bool discardable, bool kernel,
  53                                 struct drm_gem_object **obj)
  54 {
  55         struct radeon_bo *robj;
  56         unsigned long max_size;
  57         int r;
  58
  59         *obj = NULL;
  60         /* At least align on page size */
  61         if (alignment < PAGE_SIZE) {
  62                 alignment = PAGE_SIZE;
  63         }
  64
  65         /* maximun bo size is the minimun btw visible vram and gtt size */
  66         max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
  67         if (size > max_size) {
  68                 printk(KERN_WARNING "%s:%d alloc size %dMb bigger than %ldMb limit\n",
  69                        __func__, __LINE__, size >> 20, max_size >> 20);
  70                 return -ENOMEM;
  71         }
  72
  73 retry:
  74         r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain, NULL, &robj);
  75         if (r) {
  76                 if (r != -ERESTARTSYS) {
  77                         if (initial_domain == RADEON_GEM_DOMAIN_VRAM) {
  78                                 initial_domain |= RADEON_GEM_DOMAIN_GTT;
  79                                 goto retry;
  80                         }
  81                         DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
  82                                   size, initial_domain, alignment, r);
  83                 }
  84                 return r;
  85         }
  86         *obj = &robj->gem_base;
  87         robj->pid = task_pid_nr(current);
  88
  89         mutex_lock(&rdev->gem.mutex);
  90         list_add_tail(&robj->list, &rdev->gem.objects);
  91         mutex_unlock(&rdev->gem.mutex);
  92
  93         return 0;
  94 }
  95
  96 int radeon_gem_set_domain(struct drm_gem_object *gobj,
  97                           uint32_t rdomain, uint32_t wdomain)
  98 {
  99         struct radeon_bo *robj;
 100         uint32_t domain;
 101         int r;
 102
 103         /* FIXME: reeimplement */
 104         robj = gem_to_radeon_bo(gobj);
 105         /* work out where to validate the buffer to */
 106         domain = wdomain;
 107         if (!domain) {
 108                 domain = rdomain;
 109         }
 110         if (!domain) {
 111                 /* Do nothings */
 112                 printk(KERN_WARNING "Set domain without domain !\n");
 113                 return 0;
 114         }
 115         if (domain == RADEON_GEM_DOMAIN_CPU) {
 116                 /* Asking for cpu access wait for object idle */
 117                 r = radeon_bo_wait(robj, NULL, false);
 118                 if (r) {
 119                         printk(KERN_ERR "Failed to wait for object !\n");
 120                         return r;
 121                 }
 122         }
 123         return 0;
 124 }
 125
 126 int radeon_gem_init(struct radeon_device *rdev)
 127 {
 128         INIT_LIST_HEAD(&rdev->gem.objects);
 129         return 0;
 130 }
 131
 132 void radeon_gem_fini(struct radeon_device *rdev)
 133 {
 134         radeon_bo_force_delete(rdev);
 135 }
 136
 137 /*
 138  * Call from drm_gem_handle_create which appear in both new and open ioctl
 139  * case.
 140  */
 141 int radeon_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
 142 {
 143         struct radeon_bo *rbo = gem_to_radeon_bo(obj);
 144         struct radeon_device *rdev = rbo->rdev;
 145         struct radeon_fpriv *fpriv = file_priv->driver_priv;
 146         struct radeon_vm *vm = &fpriv->vm;
 147         struct radeon_bo_va *bo_va;
 148         int r;
 149
 150         if (rdev->family < CHIP_CAYMAN) {
 151                 return 0;
 152         }
 153
 154         r = radeon_bo_reserve(rbo, false);
 155         if (r) {
 156                 return r;
 157         }
 158
 159         bo_va = radeon_vm_bo_find(vm, rbo);
 160         if (!bo_va) {
 161                 bo_va = radeon_vm_bo_add(rdev, vm, rbo);
 162         } else {
 163                 ++bo_va->ref_count;
 164         }
 165         radeon_bo_unreserve(rbo);
 166
 167         return 0;
 168 }
 169
 170 void radeon_gem_object_close(struct drm_gem_object *obj,
 171                              struct drm_file *file_priv)
 172 {
 173         struct radeon_bo *rbo = gem_to_radeon_bo(obj);
 174         struct radeon_device *rdev = rbo->rdev;
 175         struct radeon_fpriv *fpriv = file_priv->driver_priv;
 176         struct radeon_vm *vm = &fpriv->vm;
 177         struct radeon_bo_va *bo_va;
 178         int r;
 179
 180         if (rdev->family < CHIP_CAYMAN) {
 181                 return;
 182         }
 183
 184         r = radeon_bo_reserve(rbo, true);
 185         if (r) {
 186                 dev_err(rdev->dev, "leaking bo va because "
 187                         "we fail to reserve bo (%d)\n", r);
 188                 return;
 189         }
 190         bo_va = radeon_vm_bo_find(vm, rbo);
 191         if (bo_va) {
 192                 if (--bo_va->ref_count == 0) {
 193                         radeon_vm_bo_rmv(rdev, bo_va);
 194                 }
 195         }
 196         radeon_bo_unreserve(rbo);
 197 }
 198
 199 static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
 200 {
 201         if (r == -EDEADLK) {
 202                 r = radeon_gpu_reset(rdev);
 203                 if (!r)
 204                         r = -EAGAIN;
 205         }
 206         return r;
 207 }
 208
 209 /*
 210  * GEM ioctls.
 211  */
 212 int radeon_gem_info_ioctl(struct drm_device *dev, void *data,
 213                           struct drm_file *filp)
 214 {
 215         struct radeon_device *rdev = dev->dev_private;
 216         struct drm_radeon_gem_info *args = data;
 217         struct ttm_mem_type_manager *man;
 218         unsigned i;
 219
 220         man = &rdev->mman.bdev.man[TTM_PL_VRAM];
 221
 222         args->vram_size = rdev->mc.real_vram_size;
 223         args->vram_visible = (u64)man->size << PAGE_SHIFT;
 224         if (rdev->stollen_vga_memory)
 225                 args->vram_visible -= radeon_bo_size(rdev->stollen_vga_memory);
 226         args->vram_visible -= radeon_fbdev_total_size(rdev);
 227         args->gart_size = rdev->mc.gtt_size - 4096 - RADEON_IB_POOL_SIZE*64*1024;
 228         for(i = 0; i < RADEON_NUM_RINGS; ++i)
 229                 args->gart_size -= rdev->ring[i].ring_size;
 230         return 0;
 231 }
 232
 233 int radeon_gem_pread_ioctl(struct drm_device *dev, void *data,
 234                            struct drm_file *filp)
 235 {
 236         /* TODO: implement */
 237         DRM_ERROR("unimplemented %s\n", __func__);
 238         return -ENOSYS;
 239 }
 240
 241 int radeon_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 242                             struct drm_file *filp)
 243 {
 244         /* TODO: implement */
 245         DRM_ERROR("unimplemented %s\n", __func__);
 246         return -ENOSYS;
 247 }
 248
 249 int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
 250                             struct drm_file *filp)
 251 {
 252         struct radeon_device *rdev = dev->dev_private;
 253         struct drm_radeon_gem_create *args = data;
 254         struct drm_gem_object *gobj;
 255         uint32_t handle;
 256         int r;
 257
 258         down_read(&rdev->exclusive_lock);
 259         /* create a gem object to contain this object in */
 260         args->size = roundup(args->size, PAGE_SIZE);
 261         r = radeon_gem_object_create(rdev, args->size, args->alignment,
 262                                         args->initial_domain, false,
 263                                         false, &gobj);
 264         if (r) {
 265                 up_read(&rdev->exclusive_lock);
 266                 r = radeon_gem_handle_lockup(rdev, r);
 267                 return r;
 268         }
 269         r = drm_gem_handle_create(filp, gobj, &handle);
 270         /* drop reference from allocate - handle holds it now */
 271         drm_gem_object_unreference_unlocked(gobj);
 272         if (r) {
 273                 up_read(&rdev->exclusive_lock);
 274                 r = radeon_gem_handle_lockup(rdev, r);
 275                 return r;
 276         }
 277         args->handle = handle;
 278         up_read(&rdev->exclusive_lock);
 279         return 0;
 280 }
 281
 282 int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 283                                 struct drm_file *filp)
 284 {
 285         /* transition the BO to a domain -
 286          * just validate the BO into a certain domain */
 287         struct radeon_device *rdev = dev->dev_private;
 288         struct drm_radeon_gem_set_domain *args = data;
 289         struct drm_gem_object *gobj;
 290         struct radeon_bo *robj;
 291         int r;
 292
 293         /* for now if someone requests domain CPU -
 294          * just make sure the buffer is finished with */
 295         down_read(&rdev->exclusive_lock);
 296
 297         /* just do a BO wait for now */
 298         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 299         if (gobj == NULL) {
 300                 up_read(&rdev->exclusive_lock);
 301                 return -ENOENT;
 302         }
 303         robj = gem_to_radeon_bo(gobj);
 304
 305         r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);
 306
 307         drm_gem_object_unreference_unlocked(gobj);
 308         up_read(&rdev->exclusive_lock);
 309         r = radeon_gem_handle_lockup(robj->rdev, r);
 310         return r;
 311 }
 312
 313 int radeon_mode_dumb_mmap(struct drm_file *filp,
 314                           struct drm_device *dev,
 315                           uint32_t handle, uint64_t *offset_p)
 316 {
 317         struct drm_gem_object *gobj;
 318         struct radeon_bo *robj;
 319
 320         gobj = drm_gem_object_lookup(dev, filp, handle);
 321         if (gobj == NULL) {
 322                 return -ENOENT;
 323         }
 324         robj = gem_to_radeon_bo(gobj);
 325         *offset_p = radeon_bo_mmap_offset(robj);
 326         drm_gem_object_unreference_unlocked(gobj);
 327         return 0;
 328 }
 329
 330 int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
 331                           struct drm_file *filp)
 332 {
 333         struct drm_radeon_gem_mmap *args = data;
 334
 335         return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
 336 }
 337
 338 int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
 339                           struct drm_file *filp)
 340 {
 341         struct radeon_device *rdev = dev->dev_private;
 342         struct drm_radeon_gem_busy *args = data;
 343         struct drm_gem_object *gobj;
 344         struct radeon_bo *robj;
 345         int r;
 346         uint32_t cur_placement = 0;
 347
 348         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 349         if (gobj == NULL) {
 350                 return -ENOENT;
 351         }
 352         robj = gem_to_radeon_bo(gobj);
 353         r = radeon_bo_wait(robj, &cur_placement, true);
 354         switch (cur_placement) {
 355         case TTM_PL_VRAM:
 356                 args->domain = RADEON_GEM_DOMAIN_VRAM;
 357                 break;
 358         case TTM_PL_TT:
 359                 args->domain = RADEON_GEM_DOMAIN_GTT;
 360                 break;
 361         case TTM_PL_SYSTEM:
 362                 args->domain = RADEON_GEM_DOMAIN_CPU;
 363         default:
 364                 break;
 365         }
 366         drm_gem_object_unreference_unlocked(gobj);
 367         r = radeon_gem_handle_lockup(rdev, r);
 368         return r;
 369 }
 370
 371 int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 372                               struct drm_file *filp)
 373 {
 374         struct radeon_device *rdev = dev->dev_private;
 375         struct drm_radeon_gem_wait_idle *args = data;
 376         struct drm_gem_object *gobj;
 377         struct radeon_bo *robj;
 378         int r;
 379
 380         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 381         if (gobj == NULL) {
 382                 return -ENOENT;
 383         }
 384         robj = gem_to_radeon_bo(gobj);
 385         r = radeon_bo_wait(robj, NULL, false);
 386         /* callback hw specific functions if any */
 387         if (rdev->asic->ioctl_wait_idle)
 388                 robj->rdev->asic->ioctl_wait_idle(rdev, robj);
 389         drm_gem_object_unreference_unlocked(gobj);
 390         r = radeon_gem_handle_lockup(rdev, r);
 391         return r;
 392 }
 393
 394 int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
 395                                 struct drm_file *filp)
 396 {
 397         struct drm_radeon_gem_set_tiling *args = data;
 398         struct drm_gem_object *gobj;
 399         struct radeon_bo *robj;
 400         int r = 0;
 401
 402         DRM_DEBUG("%d \n", args->handle);
 403         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 404         if (gobj == NULL)
 405                 return -ENOENT;
 406         robj = gem_to_radeon_bo(gobj);
 407         r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
 408         drm_gem_object_unreference_unlocked(gobj);
 409         return r;
 410 }
 411
 412 int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
 413                                 struct drm_file *filp)
 414 {
 415         struct drm_radeon_gem_get_tiling *args = data;
 416         struct drm_gem_object *gobj;
 417         struct radeon_bo *rbo;
 418         int r = 0;
 419
 420         DRM_DEBUG("\n");
 421         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 422         if (gobj == NULL)
 423                 return -ENOENT;
 424         rbo = gem_to_radeon_bo(gobj);
 425         r = radeon_bo_reserve(rbo, false);
 426         if (unlikely(r != 0))
 427                 goto out;
 428         radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
 429         radeon_bo_unreserve(rbo);
 430 out:
 431         drm_gem_object_unreference_unlocked(gobj);
 432         return r;
 433 }
 434
 435 int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
 436                           struct drm_file *filp)
 437 {
 438         struct drm_radeon_gem_va *args = data;
 439         struct drm_gem_object *gobj;
 440         struct radeon_device *rdev = dev->dev_private;
 441         struct radeon_fpriv *fpriv = filp->driver_priv;
 442         struct radeon_bo *rbo;
 443         struct radeon_bo_va *bo_va;
 444         u32 invalid_flags;
 445         int r = 0;
 446
 447         if (!rdev->vm_manager.enabled) {
 448                 args->operation = RADEON_VA_RESULT_ERROR;
 449                 return -ENOTTY;
 450         }
 451
 452         /* !! DONT REMOVE !!
 453          * We don't support vm_id yet, to be sure we don't have have broken
 454          * userspace, reject anyone trying to use non 0 value thus moving
 455          * forward we can use those fields without breaking existant userspace
 456          */
 457         if (args->vm_id) {
 458                 args->operation = RADEON_VA_RESULT_ERROR;
 459                 return -EINVAL;
 460         }
 461
 462         if (args->offset < RADEON_VA_RESERVED_SIZE) {
 463                 dev_err(&dev->pdev->dev,
 464                         "offset 0x%lX is in reserved area 0x%X\n",
 465                         (unsigned long)args->offset,
 466                         RADEON_VA_RESERVED_SIZE);
 467                 args->operation = RADEON_VA_RESULT_ERROR;
 468                 return -EINVAL;
 469         }
 470
 471         /* don't remove, we need to enforce userspace to set the snooped flag
 472          * otherwise we will endup with broken userspace and we won't be able
 473          * to enable this feature without adding new interface
 474          */
 475         invalid_flags = RADEON_VM_PAGE_VALID | RADEON_VM_PAGE_SYSTEM;
 476         if ((args->flags & invalid_flags)) {
 477                 dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
 478                         args->flags, invalid_flags);
 479                 args->operation = RADEON_VA_RESULT_ERROR;
 480                 return -EINVAL;
 481         }
 482         if (!(args->flags & RADEON_VM_PAGE_SNOOPED)) {
 483                 dev_err(&dev->pdev->dev, "only supported snooped mapping for now\n");
 484                 args->operation = RADEON_VA_RESULT_ERROR;
 485                 return -EINVAL;
 486         }
 487
 488         switch (args->operation) {
 489         case RADEON_VA_MAP:
 490         case RADEON_VA_UNMAP:
 491                 break;
 492         default:
 493                 dev_err(&dev->pdev->dev, "unsupported operation %d\n",
 494                         args->operation);
 495                 args->operation = RADEON_VA_RESULT_ERROR;
 496                 return -EINVAL;
 497         }
 498
 499         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 500         if (gobj == NULL) {
 501                 args->operation = RADEON_VA_RESULT_ERROR;
 502                 return -ENOENT;
 503         }
 504         rbo = gem_to_radeon_bo(gobj);
 505         r = radeon_bo_reserve(rbo, false);
 506         if (r) {
 507                 args->operation = RADEON_VA_RESULT_ERROR;
 508                 drm_gem_object_unreference_unlocked(gobj);
 509                 return r;
 510         }
 511         bo_va = radeon_vm_bo_find(&fpriv->vm, rbo);
 512         if (!bo_va) {
 513                 args->operation = RADEON_VA_RESULT_ERROR;
 514                 drm_gem_object_unreference_unlocked(gobj);
 515                 return -ENOENT;
 516         }
 517
 518         switch (args->operation) {
 519         case RADEON_VA_MAP:
 520                 if (bo_va->soffset) {
 521                         args->operation = RADEON_VA_RESULT_VA_EXIST;
 522                         args->offset = bo_va->soffset;
 523                         goto out;
 524                 }
 525                 r = radeon_vm_bo_set_addr(rdev, bo_va, args->offset, args->flags);
 526                 break;
 527         case RADEON_VA_UNMAP:
 528                 r = radeon_vm_bo_set_addr(rdev, bo_va, 0, 0);
 529                 break;
 530         default:
 531                 break;
 532         }
 533         args->operation = RADEON_VA_RESULT_OK;
 534         if (r) {
 535                 args->operation = RADEON_VA_RESULT_ERROR;
 536         }
 537 out:
 538         radeon_bo_unreserve(rbo);
 539         drm_gem_object_unreference_unlocked(gobj);
 540         return r;
 541 }
 542
 543 int radeon_mode_dumb_create(struct drm_file *file_priv,
 544                             struct drm_device *dev,
 545                             struct drm_mode_create_dumb *args)
 546 {
 547         struct radeon_device *rdev = dev->dev_private;
 548         struct drm_gem_object *gobj;
 549         uint32_t handle;
 550         int r;
 551
 552         args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
 553         args->size = args->pitch * args->height;
 554         args->size = ALIGN(args->size, PAGE_SIZE);
 555
 556         r = radeon_gem_object_create(rdev, args->size, 0,
 557                                      RADEON_GEM_DOMAIN_VRAM,
 558                                      false, ttm_bo_type_device,
 559                                      &gobj);
 560         if (r)
 561                 return -ENOMEM;
 562
 563         r = drm_gem_handle_create(file_priv, gobj, &handle);
 564         /* drop reference from allocate - handle holds it now */
 565         drm_gem_object_unreference_unlocked(gobj);
 566         if (r) {
 567                 return r;
 568         }
 569         args->handle = handle;
 570         return 0;
 571 }
 572
 573 int radeon_mode_dumb_destroy(struct drm_file *file_priv,
 574                              struct drm_device *dev,
 575                              uint32_t handle)
 576 {
 577         return drm_gem_handle_delete(file_priv, handle);
 578 }
 579
 580 #if defined(CONFIG_DEBUG_FS)
 581 static int radeon_debugfs_gem_info(struct seq_file *m, void *data)
 582 {
 583         struct drm_info_node *node = (struct drm_info_node *)m->private;
 584         struct drm_device *dev = node->minor->dev;
 585         struct radeon_device *rdev = dev->dev_private;
 586         struct radeon_bo *rbo;
 587         unsigned i = 0;
 588
 589         mutex_lock(&rdev->gem.mutex);
 590         list_for_each_entry(rbo, &rdev->gem.objects, list) {
 591                 unsigned domain;
 592                 const char *placement;
 593
 594                 domain = radeon_mem_type_to_domain(rbo->tbo.mem.mem_type);
 595                 switch (domain) {
 596                 case RADEON_GEM_DOMAIN_VRAM:
 597                         placement = "VRAM";
 598                         break;
 599                 case RADEON_GEM_DOMAIN_GTT:
 600                         placement = " GTT";
 601                         break;
 602                 case RADEON_GEM_DOMAIN_CPU:
 603                 default:
 604                         placement = " CPU";
 605                         break;
 606                 }
 607                 seq_printf(m, "bo[0x%08x] %8ldkB %8ldMB %s pid %8ld\n",
 608                            i, radeon_bo_size(rbo) >> 10, radeon_bo_size(rbo) >> 20,
 609                            placement, (unsigned long)rbo->pid);
 610                 i++;
 611         }
 612         mutex_unlock(&rdev->gem.mutex);
 613         return 0;
 614 }
 615
 616 static struct drm_info_list radeon_debugfs_gem_list[] = {
 617         {"radeon_gem_info", &radeon_debugfs_gem_info, 0, NULL},
 618 };
 619 #endif
 620
 621 int radeon_gem_debugfs_init(struct radeon_device *rdev)
 622 {
 623 #if defined(CONFIG_DEBUG_FS)
 624         return radeon_debugfs_add_files(rdev, radeon_debugfs_gem_list, 1);
 625 #endif
 626         return 0;
 627 }