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 void radeon_gem_object_free(struct drm_gem_object *gobj)
  33 {
  34         struct radeon_bo *robj = gem_to_radeon_bo(gobj);
  35
  36         if (robj) {
  37                 if (robj->gem_base.import_attach)
  38                         drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
  39                 radeon_bo_unref(&robj);
  40         }
  41 }
  42
  43 int radeon_gem_object_create(struct radeon_device *rdev, unsigned long size,
  44                                 int alignment, int initial_domain,
  45                                 u32 flags, bool kernel,
  46                                 struct drm_gem_object **obj)
  47 {
  48         struct radeon_bo *robj;
  49         unsigned long max_size;
  50         int r;
  51
  52         *obj = NULL;
  53         /* At least align on page size */
  54         if (alignment < PAGE_SIZE) {
  55                 alignment = PAGE_SIZE;
  56         }
  57
  58         /* Maximum bo size is the unpinned gtt size since we use the gtt to
  59          * handle vram to system pool migrations.
  60          */
  61         max_size = rdev->mc.gtt_size - rdev->gart_pin_size;
  62         if (size > max_size) {
  63                 DRM_DEBUG("Allocation size %ldMb bigger than %ldMb limit\n",
  64                           size >> 20, max_size >> 20);
  65                 return -ENOMEM;
  66         }
  67
  68 retry:
  69         r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain,
  70                              flags, NULL, &robj);
  71         if (r) {
  72                 if (r != -ERESTARTSYS) {
  73                         if (initial_domain == RADEON_GEM_DOMAIN_VRAM) {
  74                                 initial_domain |= RADEON_GEM_DOMAIN_GTT;
  75                                 goto retry;
  76                         }
  77                         DRM_ERROR("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
  78                                   size, initial_domain, alignment, r);
  79                 }
  80                 return r;
  81         }
  82         *obj = &robj->gem_base;
  83         robj->pid = task_pid_nr(current);
  84
  85         mutex_lock(&rdev->gem.mutex);
  86         list_add_tail(&robj->list, &rdev->gem.objects);
  87         mutex_unlock(&rdev->gem.mutex);
  88
  89         return 0;
  90 }
  91
  92 static int radeon_gem_set_domain(struct drm_gem_object *gobj,
  93                           uint32_t rdomain, uint32_t wdomain)
  94 {
  95         struct radeon_bo *robj;
  96         uint32_t domain;
  97         int r;
  98
  99         /* FIXME: reeimplement */
 100         robj = gem_to_radeon_bo(gobj);
 101         /* work out where to validate the buffer to */
 102         domain = wdomain;
 103         if (!domain) {
 104                 domain = rdomain;
 105         }
 106         if (!domain) {
 107                 /* Do nothings */
 108                 printk(KERN_WARNING "Set domain without domain !\n");
 109                 return 0;
 110         }
 111         if (domain == RADEON_GEM_DOMAIN_CPU) {
 112                 /* Asking for cpu access wait for object idle */
 113                 r = radeon_bo_wait(robj, NULL, false);
 114                 if (r) {
 115                         printk(KERN_ERR "Failed to wait for object !\n");
 116                         return r;
 117                 }
 118         }
 119         return 0;
 120 }
 121
 122 int radeon_gem_init(struct radeon_device *rdev)
 123 {
 124         INIT_LIST_HEAD(&rdev->gem.objects);
 125         return 0;
 126 }
 127
 128 void radeon_gem_fini(struct radeon_device *rdev)
 129 {
 130         radeon_bo_force_delete(rdev);
 131 }
 132
 133 /*
 134  * Call from drm_gem_handle_create which appear in both new and open ioctl
 135  * case.
 136  */
 137 int radeon_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
 138 {
 139         struct radeon_bo *rbo = gem_to_radeon_bo(obj);
 140         struct radeon_device *rdev = rbo->rdev;
 141         struct radeon_fpriv *fpriv = file_priv->driver_priv;
 142         struct radeon_vm *vm = &fpriv->vm;
 143         struct radeon_bo_va *bo_va;
 144         int r;
 145
 146         if (rdev->family < CHIP_CAYMAN) {
 147                 return 0;
 148         }
 149
 150         r = radeon_bo_reserve(rbo, false);
 151         if (r) {
 152                 return r;
 153         }
 154
 155         bo_va = radeon_vm_bo_find(vm, rbo);
 156         if (!bo_va) {
 157                 bo_va = radeon_vm_bo_add(rdev, vm, rbo);
 158         } else {
 159                 ++bo_va->ref_count;
 160         }
 161         radeon_bo_unreserve(rbo);
 162
 163         return 0;
 164 }
 165
 166 void radeon_gem_object_close(struct drm_gem_object *obj,
 167                              struct drm_file *file_priv)
 168 {
 169         struct radeon_bo *rbo = gem_to_radeon_bo(obj);
 170         struct radeon_device *rdev = rbo->rdev;
 171         struct radeon_fpriv *fpriv = file_priv->driver_priv;
 172         struct radeon_vm *vm = &fpriv->vm;
 173         struct radeon_bo_va *bo_va;
 174         int r;
 175
 176         if (rdev->family < CHIP_CAYMAN) {
 177                 return;
 178         }
 179
 180         r = radeon_bo_reserve(rbo, true);
 181         if (r) {
 182                 dev_err(rdev->dev, "leaking bo va because "
 183                         "we fail to reserve bo (%d)\n", r);
 184                 return;
 185         }
 186         bo_va = radeon_vm_bo_find(vm, rbo);
 187         if (bo_va) {
 188                 if (--bo_va->ref_count == 0) {
 189                         radeon_vm_bo_rmv(rdev, bo_va);
 190                 }
 191         }
 192         radeon_bo_unreserve(rbo);
 193 }
 194
 195 static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
 196 {
 197         if (r == -EDEADLK) {
 198                 r = radeon_gpu_reset(rdev);
 199                 if (!r)
 200                         r = -EAGAIN;
 201         }
 202         return r;
 203 }
 204
 205 /*
 206  * GEM ioctls.
 207  */
 208 int radeon_gem_info_ioctl(struct drm_device *dev, void *data,
 209                           struct drm_file *filp)
 210 {
 211         struct radeon_device *rdev = dev->dev_private;
 212         struct drm_radeon_gem_info *args = data;
 213         struct ttm_mem_type_manager *man;
 214
 215         man = &rdev->mman.bdev.man[TTM_PL_VRAM];
 216
 217         args->vram_size = rdev->mc.real_vram_size;
 218         args->vram_visible = (u64)man->size << PAGE_SHIFT;
 219         args->vram_visible -= rdev->vram_pin_size;
 220         args->gart_size = rdev->mc.gtt_size;
 221         args->gart_size -= rdev->gart_pin_size;
 222
 223         return 0;
 224 }
 225
 226 int radeon_gem_pread_ioctl(struct drm_device *dev, void *data,
 227                            struct drm_file *filp)
 228 {
 229         /* TODO: implement */
 230         DRM_ERROR("unimplemented %s\n", __func__);
 231         return -ENOSYS;
 232 }
 233
 234 int radeon_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 235                             struct drm_file *filp)
 236 {
 237         /* TODO: implement */
 238         DRM_ERROR("unimplemented %s\n", __func__);
 239         return -ENOSYS;
 240 }
 241
 242 int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
 243                             struct drm_file *filp)
 244 {
 245         struct radeon_device *rdev = dev->dev_private;
 246         struct drm_radeon_gem_create *args = data;
 247         struct drm_gem_object *gobj;
 248         uint32_t handle;
 249         int r;
 250
 251         down_read(&rdev->exclusive_lock);
 252         /* create a gem object to contain this object in */
 253         args->size = roundup(args->size, PAGE_SIZE);
 254         r = radeon_gem_object_create(rdev, args->size, args->alignment,
 255                                      args->initial_domain, args->flags,
 256                                      false, &gobj);
 257         if (r) {
 258                 up_read(&rdev->exclusive_lock);
 259                 r = radeon_gem_handle_lockup(rdev, r);
 260                 return r;
 261         }
 262         r = drm_gem_handle_create(filp, gobj, &handle);
 263         /* drop reference from allocate - handle holds it now */
 264         drm_gem_object_unreference_unlocked(gobj);
 265         if (r) {
 266                 up_read(&rdev->exclusive_lock);
 267                 r = radeon_gem_handle_lockup(rdev, r);
 268                 return r;
 269         }
 270         args->handle = handle;
 271         up_read(&rdev->exclusive_lock);
 272         return 0;
 273 }
 274
 275 int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 276                                 struct drm_file *filp)
 277 {
 278         /* transition the BO to a domain -
 279          * just validate the BO into a certain domain */
 280         struct radeon_device *rdev = dev->dev_private;
 281         struct drm_radeon_gem_set_domain *args = data;
 282         struct drm_gem_object *gobj;
 283         struct radeon_bo *robj;
 284         int r;
 285
 286         /* for now if someone requests domain CPU -
 287          * just make sure the buffer is finished with */
 288         down_read(&rdev->exclusive_lock);
 289
 290         /* just do a BO wait for now */
 291         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 292         if (gobj == NULL) {
 293                 up_read(&rdev->exclusive_lock);
 294                 return -ENOENT;
 295         }
 296         robj = gem_to_radeon_bo(gobj);
 297
 298         r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);
 299
 300         drm_gem_object_unreference_unlocked(gobj);
 301         up_read(&rdev->exclusive_lock);
 302         r = radeon_gem_handle_lockup(robj->rdev, r);
 303         return r;
 304 }
 305
 306 int radeon_mode_dumb_mmap(struct drm_file *filp,
 307                           struct drm_device *dev,
 308                           uint32_t handle, uint64_t *offset_p)
 309 {
 310         struct drm_gem_object *gobj;
 311         struct radeon_bo *robj;
 312
 313         gobj = drm_gem_object_lookup(dev, filp, handle);
 314         if (gobj == NULL) {
 315                 return -ENOENT;
 316         }
 317         robj = gem_to_radeon_bo(gobj);
 318         *offset_p = radeon_bo_mmap_offset(robj);
 319         drm_gem_object_unreference_unlocked(gobj);
 320         return 0;
 321 }
 322
 323 int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
 324                           struct drm_file *filp)
 325 {
 326         struct drm_radeon_gem_mmap *args = data;
 327
 328         return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
 329 }
 330
 331 int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
 332                           struct drm_file *filp)
 333 {
 334         struct radeon_device *rdev = dev->dev_private;
 335         struct drm_radeon_gem_busy *args = data;
 336         struct drm_gem_object *gobj;
 337         struct radeon_bo *robj;
 338         int r;
 339         uint32_t cur_placement = 0;
 340
 341         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 342         if (gobj == NULL) {
 343                 return -ENOENT;
 344         }
 345         robj = gem_to_radeon_bo(gobj);
 346         r = radeon_bo_wait(robj, &cur_placement, true);
 347         args->domain = radeon_mem_type_to_domain(cur_placement);
 348         drm_gem_object_unreference_unlocked(gobj);
 349         r = radeon_gem_handle_lockup(rdev, r);
 350         return r;
 351 }
 352
 353 int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 354                               struct drm_file *filp)
 355 {
 356         struct radeon_device *rdev = dev->dev_private;
 357         struct drm_radeon_gem_wait_idle *args = data;
 358         struct drm_gem_object *gobj;
 359         struct radeon_bo *robj;
 360         int r;
 361
 362         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 363         if (gobj == NULL) {
 364                 return -ENOENT;
 365         }
 366         robj = gem_to_radeon_bo(gobj);
 367         r = radeon_bo_wait(robj, NULL, false);
 368         /* Flush HDP cache via MMIO if necessary */
 369         if (rdev->asic->mmio_hdp_flush)
 370                 robj->rdev->asic->mmio_hdp_flush(rdev);
 371         drm_gem_object_unreference_unlocked(gobj);
 372         r = radeon_gem_handle_lockup(rdev, r);
 373         return r;
 374 }
 375
 376 int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
 377                                 struct drm_file *filp)
 378 {
 379         struct drm_radeon_gem_set_tiling *args = data;
 380         struct drm_gem_object *gobj;
 381         struct radeon_bo *robj;
 382         int r = 0;
 383
 384         DRM_DEBUG("%d \n", args->handle);
 385         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 386         if (gobj == NULL)
 387                 return -ENOENT;
 388         robj = gem_to_radeon_bo(gobj);
 389         r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
 390         drm_gem_object_unreference_unlocked(gobj);
 391         return r;
 392 }
 393
 394 int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
 395                                 struct drm_file *filp)
 396 {
 397         struct drm_radeon_gem_get_tiling *args = data;
 398         struct drm_gem_object *gobj;
 399         struct radeon_bo *rbo;
 400         int r = 0;
 401
 402         DRM_DEBUG("\n");
 403         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 404         if (gobj == NULL)
 405                 return -ENOENT;
 406         rbo = gem_to_radeon_bo(gobj);
 407         r = radeon_bo_reserve(rbo, false);
 408         if (unlikely(r != 0))
 409                 goto out;
 410         radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
 411         radeon_bo_unreserve(rbo);
 412 out:
 413         drm_gem_object_unreference_unlocked(gobj);
 414         return r;
 415 }
 416
 417 int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
 418                           struct drm_file *filp)
 419 {
 420         struct drm_radeon_gem_va *args = data;
 421         struct drm_gem_object *gobj;
 422         struct radeon_device *rdev = dev->dev_private;
 423         struct radeon_fpriv *fpriv = filp->driver_priv;
 424         struct radeon_bo *rbo;
 425         struct radeon_bo_va *bo_va;
 426         u32 invalid_flags;
 427         int r = 0;
 428
 429         if (!rdev->vm_manager.enabled) {
 430                 args->operation = RADEON_VA_RESULT_ERROR;
 431                 return -ENOTTY;
 432         }
 433
 434         /* !! DONT REMOVE !!
 435          * We don't support vm_id yet, to be sure we don't have have broken
 436          * userspace, reject anyone trying to use non 0 value thus moving
 437          * forward we can use those fields without breaking existant userspace
 438          */
 439         if (args->vm_id) {
 440                 args->operation = RADEON_VA_RESULT_ERROR;
 441                 return -EINVAL;
 442         }
 443
 444         if (args->offset < RADEON_VA_RESERVED_SIZE) {
 445                 dev_err(&dev->pdev->dev,
 446                         "offset 0x%lX is in reserved area 0x%X\n",
 447                         (unsigned long)args->offset,
 448                         RADEON_VA_RESERVED_SIZE);
 449                 args->operation = RADEON_VA_RESULT_ERROR;
 450                 return -EINVAL;
 451         }
 452
 453         /* don't remove, we need to enforce userspace to set the snooped flag
 454          * otherwise we will endup with broken userspace and we won't be able
 455          * to enable this feature without adding new interface
 456          */
 457         invalid_flags = RADEON_VM_PAGE_VALID | RADEON_VM_PAGE_SYSTEM;
 458         if ((args->flags & invalid_flags)) {
 459                 dev_err(&dev->pdev->dev, "invalid flags 0x%08X vs 0x%08X\n",
 460                         args->flags, invalid_flags);
 461                 args->operation = RADEON_VA_RESULT_ERROR;
 462                 return -EINVAL;
 463         }
 464
 465         switch (args->operation) {
 466         case RADEON_VA_MAP:
 467         case RADEON_VA_UNMAP:
 468                 break;
 469         default:
 470                 dev_err(&dev->pdev->dev, "unsupported operation %d\n",
 471                         args->operation);
 472                 args->operation = RADEON_VA_RESULT_ERROR;
 473                 return -EINVAL;
 474         }
 475
 476         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 477         if (gobj == NULL) {
 478                 args->operation = RADEON_VA_RESULT_ERROR;
 479                 return -ENOENT;
 480         }
 481         rbo = gem_to_radeon_bo(gobj);
 482         r = radeon_bo_reserve(rbo, false);
 483         if (r) {
 484                 args->operation = RADEON_VA_RESULT_ERROR;
 485                 drm_gem_object_unreference_unlocked(gobj);
 486                 return r;
 487         }
 488         bo_va = radeon_vm_bo_find(&fpriv->vm, rbo);
 489         if (!bo_va) {
 490                 args->operation = RADEON_VA_RESULT_ERROR;
 491                 drm_gem_object_unreference_unlocked(gobj);
 492                 return -ENOENT;
 493         }
 494
 495         switch (args->operation) {
 496         case RADEON_VA_MAP:
 497                 if (bo_va->soffset) {
 498                         args->operation = RADEON_VA_RESULT_VA_EXIST;
 499                         args->offset = bo_va->soffset;
 500                         goto out;
 501                 }
 502                 r = radeon_vm_bo_set_addr(rdev, bo_va, args->offset, args->flags);
 503                 break;
 504         case RADEON_VA_UNMAP:
 505                 r = radeon_vm_bo_set_addr(rdev, bo_va, 0, 0);
 506                 break;
 507         default:
 508                 break;
 509         }
 510         args->operation = RADEON_VA_RESULT_OK;
 511         if (r) {
 512                 args->operation = RADEON_VA_RESULT_ERROR;
 513         }
 514 out:
 515         radeon_bo_unreserve(rbo);
 516         drm_gem_object_unreference_unlocked(gobj);
 517         return r;
 518 }
 519
 520 int radeon_gem_op_ioctl(struct drm_device *dev, void *data,
 521                         struct drm_file *filp)
 522 {
 523         struct drm_radeon_gem_op *args = data;
 524         struct drm_gem_object *gobj;
 525         struct radeon_bo *robj;
 526         int r;
 527
 528         gobj = drm_gem_object_lookup(dev, filp, args->handle);
 529         if (gobj == NULL) {
 530                 return -ENOENT;
 531         }
 532         robj = gem_to_radeon_bo(gobj);
 533         r = radeon_bo_reserve(robj, false);
 534         if (unlikely(r))
 535                 goto out;
 536
 537         switch (args->op) {
 538         case RADEON_GEM_OP_GET_INITIAL_DOMAIN:
 539                 args->value = robj->initial_domain;
 540                 break;
 541         case RADEON_GEM_OP_SET_INITIAL_DOMAIN:
 542                 robj->initial_domain = args->value & (RADEON_GEM_DOMAIN_VRAM |
 543                                                       RADEON_GEM_DOMAIN_GTT |
 544                                                       RADEON_GEM_DOMAIN_CPU);
 545                 break;
 546         default:
 547                 r = -EINVAL;
 548         }
 549
 550         radeon_bo_unreserve(robj);
 551 out:
 552         drm_gem_object_unreference_unlocked(gobj);
 553         return r;
 554 }
 555
 556 int radeon_mode_dumb_create(struct drm_file *file_priv,
 557                             struct drm_device *dev,
 558                             struct drm_mode_create_dumb *args)
 559 {
 560         struct radeon_device *rdev = dev->dev_private;
 561         struct drm_gem_object *gobj;
 562         uint32_t handle;
 563         int r;
 564
 565         args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
 566         args->size = args->pitch * args->height;
 567         args->size = ALIGN(args->size, PAGE_SIZE);
 568
 569         r = radeon_gem_object_create(rdev, args->size, 0,
 570                                      RADEON_GEM_DOMAIN_VRAM, 0,
 571                                      false, &gobj);
 572         if (r)
 573                 return -ENOMEM;
 574
 575         r = drm_gem_handle_create(file_priv, gobj, &handle);
 576         /* drop reference from allocate - handle holds it now */
 577         drm_gem_object_unreference_unlocked(gobj);
 578         if (r) {
 579                 return r;
 580         }
 581         args->handle = handle;
 582         return 0;
 583 }
 584
 585 #if defined(CONFIG_DEBUG_FS)
 586 static int radeon_debugfs_gem_info(struct seq_file *m, void *data)
 587 {
 588         struct drm_info_node *node = (struct drm_info_node *)m->private;
 589         struct drm_device *dev = node->minor->dev;
 590         struct radeon_device *rdev = dev->dev_private;
 591         struct radeon_bo *rbo;
 592         unsigned i = 0;
 593
 594         mutex_lock(&rdev->gem.mutex);
 595         list_for_each_entry(rbo, &rdev->gem.objects, list) {
 596                 unsigned domain;
 597                 const char *placement;
 598
 599                 domain = radeon_mem_type_to_domain(rbo->tbo.mem.mem_type);
 600                 switch (domain) {
 601                 case RADEON_GEM_DOMAIN_VRAM:
 602                         placement = "VRAM";
 603                         break;
 604                 case RADEON_GEM_DOMAIN_GTT:
 605                         placement = " GTT";
 606                         break;
 607                 case RADEON_GEM_DOMAIN_CPU:
 608                 default:
 609                         placement = " CPU";
 610                         break;
 611                 }
 612                 seq_printf(m, "bo[0x%08x] %8ldkB %8ldMB %s pid %8ld\n",
 613                            i, radeon_bo_size(rbo) >> 10, radeon_bo_size(rbo) >> 20,
 614                            placement, (unsigned long)rbo->pid);
 615                 i++;
 616         }
 617         mutex_unlock(&rdev->gem.mutex);
 618         return 0;
 619 }
 620
 621 static struct drm_info_list radeon_debugfs_gem_list[] = {
 622         {"radeon_gem_info", &radeon_debugfs_gem_info, 0, NULL},
 623 };
 624 #endif
 625
 626 int radeon_gem_debugfs_init(struct radeon_device *rdev)
 627 {
 628 #if defined(CONFIG_DEBUG_FS)
 629         return radeon_debugfs_add_files(rdev, radeon_debugfs_gem_list, 1);
 630 #endif
 631         return 0;
 632 }