drivers/gpu/drm/amd/amdgpu/amdgpu_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 <linux/ktime.h>
  29 #include <linux/pagemap.h>
  30 #include <drm/drmP.h>
  31 #include <drm/amdgpu_drm.h>
  32 #include "amdgpu.h"
  33
  34 void amdgpu_gem_object_free(struct drm_gem_object *gobj)
  35 {
  36         struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj);
  37
  38         if (robj) {
  39                 if (robj->gem_base.import_attach)
  40                         drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
  41                 amdgpu_mn_unregister(robj);
  42                 amdgpu_bo_unref(&robj);
  43         }
  44 }
  45
  46 int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
  47                                 int alignment, u32 initial_domain,
  48                                 u64 flags, bool kernel,
  49                                 struct drm_gem_object **obj)
  50 {
  51         struct amdgpu_bo *robj;
  52         unsigned long max_size;
  53         int r;
  54
  55         *obj = NULL;
  56         /* At least align on page size */
  57         if (alignment < PAGE_SIZE) {
  58                 alignment = PAGE_SIZE;
  59         }
  60
  61         if (!(initial_domain & (AMDGPU_GEM_DOMAIN_GDS | AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA))) {
  62                 /* Maximum bo size is the unpinned gtt size since we use the gtt to
  63                  * handle vram to system pool migrations.
  64                  */
  65                 max_size = adev->mc.gtt_size - adev->gart_pin_size;
  66                 if (size > max_size) {
  67                         DRM_DEBUG("Allocation size %ldMb bigger than %ldMb limit\n",
  68                                   size >> 20, max_size >> 20);
  69                         return -ENOMEM;
  70                 }
  71         }
  72 retry:
  73         r = amdgpu_bo_create(adev, size, alignment, kernel, initial_domain,
  74                              flags, NULL, NULL, &robj);
  75         if (r) {
  76                 if (r != -ERESTARTSYS) {
  77                         if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
  78                                 initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
  79                                 goto retry;
  80                         }
  81                         DRM_ERROR("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
  82                                   size, initial_domain, alignment, r);
  83                 }
  84                 return r;
  85         }
  86         *obj = &robj->gem_base;
  87
  88         return 0;
  89 }
  90
  91 void amdgpu_gem_force_release(struct amdgpu_device *adev)
  92 {
  93         struct drm_device *ddev = adev->ddev;
  94         struct drm_file *file;
  95
  96         mutex_lock(&ddev->filelist_mutex);
  97
  98         list_for_each_entry(file, &ddev->filelist, lhead) {
  99                 struct drm_gem_object *gobj;
 100                 int handle;
 101
 102                 WARN_ONCE(1, "Still active user space clients!\n");
 103                 spin_lock(&file->table_lock);
 104                 idr_for_each_entry(&file->object_idr, gobj, handle) {
 105                         WARN_ONCE(1, "And also active allocations!\n");
 106                         drm_gem_object_unreference_unlocked(gobj);
 107                 }
 108                 idr_destroy(&file->object_idr);
 109                 spin_unlock(&file->table_lock);
 110         }
 111
 112         mutex_unlock(&ddev->filelist_mutex);
 113 }
 114
 115 /*
 116  * Call from drm_gem_handle_create which appear in both new and open ioctl
 117  * case.
 118  */
 119 int amdgpu_gem_object_open(struct drm_gem_object *obj,
 120                            struct drm_file *file_priv)
 121 {
 122         struct amdgpu_bo *abo = gem_to_amdgpu_bo(obj);
 123         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
 124         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 125         struct amdgpu_vm *vm = &fpriv->vm;
 126         struct amdgpu_bo_va *bo_va;
 127         int r;
 128         r = amdgpu_bo_reserve(abo, false);
 129         if (r)
 130                 return r;
 131
 132         bo_va = amdgpu_vm_bo_find(vm, abo);
 133         if (!bo_va) {
 134                 bo_va = amdgpu_vm_bo_add(adev, vm, abo);
 135         } else {
 136                 ++bo_va->ref_count;
 137         }
 138         amdgpu_bo_unreserve(abo);
 139         return 0;
 140 }
 141
 142 void amdgpu_gem_object_close(struct drm_gem_object *obj,
 143                              struct drm_file *file_priv)
 144 {
 145         struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
 146         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 147         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 148         struct amdgpu_vm *vm = &fpriv->vm;
 149
 150         struct amdgpu_bo_list_entry vm_pd;
 151         struct list_head list, duplicates;
 152         struct ttm_validate_buffer tv;
 153         struct ww_acquire_ctx ticket;
 154         struct amdgpu_bo_va *bo_va;
 155         int r;
 156
 157         INIT_LIST_HEAD(&list);
 158         INIT_LIST_HEAD(&duplicates);
 159
 160         tv.bo = &bo->tbo;
 161         tv.shared = true;
 162         list_add(&tv.head, &list);
 163
 164         amdgpu_vm_get_pd_bo(vm, &list, &vm_pd);
 165
 166         r = ttm_eu_reserve_buffers(&ticket, &list, false, &duplicates);
 167         if (r) {
 168                 dev_err(adev->dev, "leaking bo va because "
 169                         "we fail to reserve bo (%d)\n", r);
 170                 return;
 171         }
 172         bo_va = amdgpu_vm_bo_find(vm, bo);
 173         if (bo_va) {
 174                 if (--bo_va->ref_count == 0) {
 175                         amdgpu_vm_bo_rmv(adev, bo_va);
 176                 }
 177         }
 178         ttm_eu_backoff_reservation(&ticket, &list);
 179 }
 180
 181 static int amdgpu_gem_handle_lockup(struct amdgpu_device *adev, int r)
 182 {
 183         if (r == -EDEADLK) {
 184                 r = amdgpu_gpu_reset(adev);
 185                 if (!r)
 186                         r = -EAGAIN;
 187         }
 188         return r;
 189 }
 190
 191 /*
 192  * GEM ioctls.
 193  */
 194 int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 195                             struct drm_file *filp)
 196 {
 197         struct amdgpu_device *adev = dev->dev_private;
 198         union drm_amdgpu_gem_create *args = data;
 199         uint64_t size = args->in.bo_size;
 200         struct drm_gem_object *gobj;
 201         uint32_t handle;
 202         bool kernel = false;
 203         int r;
 204
 205         /* reject invalid gem flags */
 206         if (args->in.domain_flags & ~(AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 207                                       AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
 208                                       AMDGPU_GEM_CREATE_CPU_GTT_USWC |
 209                                       AMDGPU_GEM_CREATE_VRAM_CLEARED|
 210                                       AMDGPU_GEM_CREATE_SHADOW |
 211                                       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
 212                 r = -EINVAL;
 213                 goto error_unlock;
 214         }
 215         /* reject invalid gem domains */
 216         if (args->in.domains & ~(AMDGPU_GEM_DOMAIN_CPU |
 217                                  AMDGPU_GEM_DOMAIN_GTT |
 218                                  AMDGPU_GEM_DOMAIN_VRAM |
 219                                  AMDGPU_GEM_DOMAIN_GDS |
 220                                  AMDGPU_GEM_DOMAIN_GWS |
 221                                  AMDGPU_GEM_DOMAIN_OA)) {
 222                 r = -EINVAL;
 223                 goto error_unlock;
 224         }
 225
 226         /* create a gem object to contain this object in */
 227         if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS |
 228             AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
 229                 kernel = true;
 230                 if (args->in.domains == AMDGPU_GEM_DOMAIN_GDS)
 231                         size = size << AMDGPU_GDS_SHIFT;
 232                 else if (args->in.domains == AMDGPU_GEM_DOMAIN_GWS)
 233                         size = size << AMDGPU_GWS_SHIFT;
 234                 else if (args->in.domains == AMDGPU_GEM_DOMAIN_OA)
 235                         size = size << AMDGPU_OA_SHIFT;
 236                 else {
 237                         r = -EINVAL;
 238                         goto error_unlock;
 239                 }
 240         }
 241         size = roundup(size, PAGE_SIZE);
 242
 243         r = amdgpu_gem_object_create(adev, size, args->in.alignment,
 244                                      (u32)(0xffffffff & args->in.domains),
 245                                      args->in.domain_flags,
 246                                      kernel, &gobj);
 247         if (r)
 248                 goto error_unlock;
 249
 250         r = drm_gem_handle_create(filp, gobj, &handle);
 251         /* drop reference from allocate - handle holds it now */
 252         drm_gem_object_unreference_unlocked(gobj);
 253         if (r)
 254                 goto error_unlock;
 255
 256         memset(args, 0, sizeof(*args));
 257         args->out.handle = handle;
 258         return 0;
 259
 260 error_unlock:
 261         r = amdgpu_gem_handle_lockup(adev, r);
 262         return r;
 263 }
 264
 265 int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
 266                              struct drm_file *filp)
 267 {
 268         struct amdgpu_device *adev = dev->dev_private;
 269         struct drm_amdgpu_gem_userptr *args = data;
 270         struct drm_gem_object *gobj;
 271         struct amdgpu_bo *bo;
 272         uint32_t handle;
 273         int r;
 274
 275         if (offset_in_page(args->addr | args->size))
 276                 return -EINVAL;
 277
 278         /* reject unknown flag values */
 279         if (args->flags & ~(AMDGPU_GEM_USERPTR_READONLY |
 280             AMDGPU_GEM_USERPTR_ANONONLY | AMDGPU_GEM_USERPTR_VALIDATE |
 281             AMDGPU_GEM_USERPTR_REGISTER))
 282                 return -EINVAL;
 283
 284         if (!(args->flags & AMDGPU_GEM_USERPTR_READONLY) &&
 285              !(args->flags & AMDGPU_GEM_USERPTR_REGISTER)) {
 286
 287                 /* if we want to write to it we must install a MMU notifier */
 288                 return -EACCES;
 289         }
 290
 291         /* create a gem object to contain this object in */
 292         r = amdgpu_gem_object_create(adev, args->size, 0,
 293                                      AMDGPU_GEM_DOMAIN_CPU, 0,
 294                                      0, &gobj);
 295         if (r)
 296                 goto handle_lockup;
 297
 298         bo = gem_to_amdgpu_bo(gobj);
 299         bo->prefered_domains = AMDGPU_GEM_DOMAIN_GTT;
 300         bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
 301         r = amdgpu_ttm_tt_set_userptr(bo->tbo.ttm, args->addr, args->flags);
 302         if (r)
 303                 goto release_object;
 304
 305         if (args->flags & AMDGPU_GEM_USERPTR_REGISTER) {
 306                 r = amdgpu_mn_register(bo, args->addr);
 307                 if (r)
 308                         goto release_object;
 309         }
 310
 311         if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
 312                 down_read(&current->mm->mmap_sem);
 313
 314                 r = amdgpu_ttm_tt_get_user_pages(bo->tbo.ttm,
 315                                                  bo->tbo.ttm->pages);
 316                 if (r)
 317                         goto unlock_mmap_sem;
 318
 319                 r = amdgpu_bo_reserve(bo, true);
 320                 if (r)
 321                         goto free_pages;
 322
 323                 amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
 324                 r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 325                 amdgpu_bo_unreserve(bo);
 326                 if (r)
 327                         goto free_pages;
 328
 329                 up_read(&current->mm->mmap_sem);
 330         }
 331
 332         r = drm_gem_handle_create(filp, gobj, &handle);
 333         /* drop reference from allocate - handle holds it now */
 334         drm_gem_object_unreference_unlocked(gobj);
 335         if (r)
 336                 goto handle_lockup;
 337
 338         args->handle = handle;
 339         return 0;
 340
 341 free_pages:
 342         release_pages(bo->tbo.ttm->pages, bo->tbo.ttm->num_pages, false);
 343
 344 unlock_mmap_sem:
 345         up_read(&current->mm->mmap_sem);
 346
 347 release_object:
 348         drm_gem_object_unreference_unlocked(gobj);
 349
 350 handle_lockup:
 351         r = amdgpu_gem_handle_lockup(adev, r);
 352
 353         return r;
 354 }
 355
 356 int amdgpu_mode_dumb_mmap(struct drm_file *filp,
 357                           struct drm_device *dev,
 358                           uint32_t handle, uint64_t *offset_p)
 359 {
 360         struct drm_gem_object *gobj;
 361         struct amdgpu_bo *robj;
 362
 363         gobj = drm_gem_object_lookup(filp, handle);
 364         if (gobj == NULL) {
 365                 return -ENOENT;
 366         }
 367         robj = gem_to_amdgpu_bo(gobj);
 368         if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm) ||
 369             (robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
 370                 drm_gem_object_unreference_unlocked(gobj);
 371                 return -EPERM;
 372         }
 373         *offset_p = amdgpu_bo_mmap_offset(robj);
 374         drm_gem_object_unreference_unlocked(gobj);
 375         return 0;
 376 }
 377
 378 int amdgpu_gem_mmap_ioctl(struct drm_device *dev, void *data,
 379                           struct drm_file *filp)
 380 {
 381         union drm_amdgpu_gem_mmap *args = data;
 382         uint32_t handle = args->in.handle;
 383         memset(args, 0, sizeof(*args));
 384         return amdgpu_mode_dumb_mmap(filp, dev, handle, &args->out.addr_ptr);
 385 }
 386
 387 /**
 388  * amdgpu_gem_timeout - calculate jiffies timeout from absolute value
 389  *
 390  * @timeout_ns: timeout in ns
 391  *
 392  * Calculate the timeout in jiffies from an absolute timeout in ns.
 393  */
 394 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns)
 395 {
 396         unsigned long timeout_jiffies;
 397         ktime_t timeout;
 398
 399         /* clamp timeout if it's to large */
 400         if (((int64_t)timeout_ns) < 0)
 401                 return MAX_SCHEDULE_TIMEOUT;
 402
 403         timeout = ktime_sub(ns_to_ktime(timeout_ns), ktime_get());
 404         if (ktime_to_ns(timeout) < 0)
 405                 return 0;
 406
 407         timeout_jiffies = nsecs_to_jiffies(ktime_to_ns(timeout));
 408         /*  clamp timeout to avoid unsigned-> signed overflow */
 409         if (timeout_jiffies > MAX_SCHEDULE_TIMEOUT )
 410                 return MAX_SCHEDULE_TIMEOUT - 1;
 411
 412         return timeout_jiffies;
 413 }
 414
 415 int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 416                               struct drm_file *filp)
 417 {
 418         struct amdgpu_device *adev = dev->dev_private;
 419         union drm_amdgpu_gem_wait_idle *args = data;
 420         struct drm_gem_object *gobj;
 421         struct amdgpu_bo *robj;
 422         uint32_t handle = args->in.handle;
 423         unsigned long timeout = amdgpu_gem_timeout(args->in.timeout);
 424         int r = 0;
 425         long ret;
 426
 427         gobj = drm_gem_object_lookup(filp, handle);
 428         if (gobj == NULL) {
 429                 return -ENOENT;
 430         }
 431         robj = gem_to_amdgpu_bo(gobj);
 432         ret = reservation_object_wait_timeout_rcu(robj->tbo.resv, true, true,
 433                                                   timeout);
 434
 435         /* ret == 0 means not signaled,
 436          * ret > 0 means signaled
 437          * ret < 0 means interrupted before timeout
 438          */
 439         if (ret >= 0) {
 440                 memset(args, 0, sizeof(*args));
 441                 args->out.status = (ret == 0);
 442         } else
 443                 r = ret;
 444
 445         drm_gem_object_unreference_unlocked(gobj);
 446         r = amdgpu_gem_handle_lockup(adev, r);
 447         return r;
 448 }
 449
 450 int amdgpu_gem_metadata_ioctl(struct drm_device *dev, void *data,
 451                                 struct drm_file *filp)
 452 {
 453         struct drm_amdgpu_gem_metadata *args = data;
 454         struct drm_gem_object *gobj;
 455         struct amdgpu_bo *robj;
 456         int r = -1;
 457
 458         DRM_DEBUG("%d \n", args->handle);
 459         gobj = drm_gem_object_lookup(filp, args->handle);
 460         if (gobj == NULL)
 461                 return -ENOENT;
 462         robj = gem_to_amdgpu_bo(gobj);
 463
 464         r = amdgpu_bo_reserve(robj, false);
 465         if (unlikely(r != 0))
 466                 goto out;
 467
 468         if (args->op == AMDGPU_GEM_METADATA_OP_GET_METADATA) {
 469                 amdgpu_bo_get_tiling_flags(robj, &args->data.tiling_info);
 470                 r = amdgpu_bo_get_metadata(robj, args->data.data,
 471                                            sizeof(args->data.data),
 472                                            &args->data.data_size_bytes,
 473                                            &args->data.flags);
 474         } else if (args->op == AMDGPU_GEM_METADATA_OP_SET_METADATA) {
 475                 if (args->data.data_size_bytes > sizeof(args->data.data)) {
 476                         r = -EINVAL;
 477                         goto unreserve;
 478                 }
 479                 r = amdgpu_bo_set_tiling_flags(robj, args->data.tiling_info);
 480                 if (!r)
 481                         r = amdgpu_bo_set_metadata(robj, args->data.data,
 482                                                    args->data.data_size_bytes,
 483                                                    args->data.flags);
 484         }
 485
 486 unreserve:
 487         amdgpu_bo_unreserve(robj);
 488 out:
 489         drm_gem_object_unreference_unlocked(gobj);
 490         return r;
 491 }
 492
 493 static int amdgpu_gem_va_check(void *param, struct amdgpu_bo *bo)
 494 {
 495         /* if anything is swapped out don't swap it in here,
 496            just abort and wait for the next CS */
 497         if (!amdgpu_bo_gpu_accessible(bo))
 498                 return -ERESTARTSYS;
 499
 500         if (bo->shadow && !amdgpu_bo_gpu_accessible(bo->shadow))
 501                 return -ERESTARTSYS;
 502
 503         return 0;
 504 }
 505
 506 /**
 507  * amdgpu_gem_va_update_vm -update the bo_va in its VM
 508  *
 509  * @adev: amdgpu_device pointer
 510  * @bo_va: bo_va to update
 511  * @list: validation list
 512  * @operation: map or unmap
 513  *
 514  * Update the bo_va directly after setting its address. Errors are not
 515  * vital here, so they are not reported back to userspace.
 516  */
 517 static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
 518                                     struct amdgpu_bo_va *bo_va,
 519                                     struct list_head *list,
 520                                     uint32_t operation)
 521 {
 522         struct ttm_validate_buffer *entry;
 523         int r = -ERESTARTSYS;
 524
 525         list_for_each_entry(entry, list, head) {
 526                 struct amdgpu_bo *bo =
 527                         container_of(entry->bo, struct amdgpu_bo, tbo);
 528                 if (amdgpu_gem_va_check(NULL, bo))
 529                         goto error;
 530         }
 531
 532         r = amdgpu_vm_validate_pt_bos(adev, bo_va->vm, amdgpu_gem_va_check,
 533                                       NULL);
 534         if (r)
 535                 goto error;
 536
 537         r = amdgpu_vm_update_page_directory(adev, bo_va->vm);
 538         if (r)
 539                 goto error;
 540
 541         r = amdgpu_vm_clear_freed(adev, bo_va->vm);
 542         if (r)
 543                 goto error;
 544
 545         if (operation == AMDGPU_VA_OP_MAP)
 546                 r = amdgpu_vm_bo_update(adev, bo_va, false);
 547
 548 error:
 549         if (r && r != -ERESTARTSYS)
 550                 DRM_ERROR("Couldn't update BO_VA (%d)\n", r);
 551 }
 552
 553 int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
 554                           struct drm_file *filp)
 555 {
 556         const uint32_t valid_flags = AMDGPU_VM_DELAY_UPDATE |
 557                 AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_PAGE_WRITEABLE |
 558                 AMDGPU_VM_PAGE_EXECUTABLE;
 559         const uint32_t prt_flags = AMDGPU_VM_DELAY_UPDATE |
 560                 AMDGPU_VM_PAGE_PRT;
 561
 562         struct drm_amdgpu_gem_va *args = data;
 563         struct drm_gem_object *gobj;
 564         struct amdgpu_device *adev = dev->dev_private;
 565         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 566         struct amdgpu_bo *abo;
 567         struct amdgpu_bo_va *bo_va;
 568         struct amdgpu_bo_list_entry vm_pd;
 569         struct ttm_validate_buffer tv;
 570         struct ww_acquire_ctx ticket;
 571         struct list_head list;
 572         uint64_t va_flags = 0;
 573         int r = 0;
 574
 575         if (!adev->vm_manager.enabled)
 576                 return -ENOTTY;
 577
 578         if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
 579                 dev_err(&dev->pdev->dev,
 580                         "va_address 0x%lX is in reserved area 0x%X\n",
 581                         (unsigned long)args->va_address,
 582                         AMDGPU_VA_RESERVED_SIZE);
 583                 return -EINVAL;
 584         }
 585
 586         if ((args->flags & ~valid_flags) && (args->flags & ~prt_flags)) {
 587                 dev_err(&dev->pdev->dev, "invalid flags combination 0x%08X\n",
 588                         args->flags);
 589                 return -EINVAL;
 590         }
 591
 592         switch (args->operation) {
 593         case AMDGPU_VA_OP_MAP:
 594         case AMDGPU_VA_OP_UNMAP:
 595                 break;
 596         default:
 597                 dev_err(&dev->pdev->dev, "unsupported operation %d\n",
 598                         args->operation);
 599                 return -EINVAL;
 600         }
 601
 602         INIT_LIST_HEAD(&list);
 603         if (!(args->flags & AMDGPU_VM_PAGE_PRT)) {
 604                 gobj = drm_gem_object_lookup(filp, args->handle);
 605                 if (gobj == NULL)
 606                         return -ENOENT;
 607                 abo = gem_to_amdgpu_bo(gobj);
 608                 tv.bo = &abo->tbo;
 609                 tv.shared = false;
 610                 list_add(&tv.head, &list);
 611         } else {
 612                 gobj = NULL;
 613                 abo = NULL;
 614         }
 615
 616         amdgpu_vm_get_pd_bo(&fpriv->vm, &list, &vm_pd);
 617
 618         r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
 619         if (r)
 620                 goto error_unref;
 621
 622         if (abo) {
 623                 bo_va = amdgpu_vm_bo_find(&fpriv->vm, abo);
 624                 if (!bo_va) {
 625                         r = -ENOENT;
 626                         goto error_backoff;
 627                 }
 628         } else {
 629                 bo_va = fpriv->prt_va;
 630         }
 631
 632         switch (args->operation) {
 633         case AMDGPU_VA_OP_MAP:
 634                 if (args->flags & AMDGPU_VM_PAGE_READABLE)
 635                         va_flags |= AMDGPU_PTE_READABLE;
 636                 if (args->flags & AMDGPU_VM_PAGE_WRITEABLE)
 637                         va_flags |= AMDGPU_PTE_WRITEABLE;
 638                 if (args->flags & AMDGPU_VM_PAGE_EXECUTABLE)
 639                         va_flags |= AMDGPU_PTE_EXECUTABLE;
 640                 if (args->flags & AMDGPU_VM_PAGE_PRT)
 641                         va_flags |= AMDGPU_PTE_PRT;
 642                 r = amdgpu_vm_bo_map(adev, bo_va, args->va_address,
 643                                      args->offset_in_bo, args->map_size,
 644                                      va_flags);
 645                 break;
 646         case AMDGPU_VA_OP_UNMAP:
 647                 r = amdgpu_vm_bo_unmap(adev, bo_va, args->va_address);
 648                 break;
 649         default:
 650                 break;
 651         }
 652         if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE) && !amdgpu_vm_debug)
 653                 amdgpu_gem_va_update_vm(adev, bo_va, &list, args->operation);
 654
 655 error_backoff:
 656         ttm_eu_backoff_reservation(&ticket, &list);
 657
 658 error_unref:
 659         drm_gem_object_unreference_unlocked(gobj);
 660         return r;
 661 }
 662
 663 int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
 664                         struct drm_file *filp)
 665 {
 666         struct drm_amdgpu_gem_op *args = data;
 667         struct drm_gem_object *gobj;
 668         struct amdgpu_bo *robj;
 669         int r;
 670
 671         gobj = drm_gem_object_lookup(filp, args->handle);
 672         if (gobj == NULL) {
 673                 return -ENOENT;
 674         }
 675         robj = gem_to_amdgpu_bo(gobj);
 676
 677         r = amdgpu_bo_reserve(robj, false);
 678         if (unlikely(r))
 679                 goto out;
 680
 681         switch (args->op) {
 682         case AMDGPU_GEM_OP_GET_GEM_CREATE_INFO: {
 683                 struct drm_amdgpu_gem_create_in info;
 684                 void __user *out = (void __user *)(long)args->value;
 685
 686                 info.bo_size = robj->gem_base.size;
 687                 info.alignment = robj->tbo.mem.page_alignment << PAGE_SHIFT;
 688                 info.domains = robj->prefered_domains;
 689                 info.domain_flags = robj->flags;
 690                 amdgpu_bo_unreserve(robj);
 691                 if (copy_to_user(out, &info, sizeof(info)))
 692                         r = -EFAULT;
 693                 break;
 694         }
 695         case AMDGPU_GEM_OP_SET_PLACEMENT:
 696                 if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm)) {
 697                         r = -EPERM;
 698                         amdgpu_bo_unreserve(robj);
 699                         break;
 700                 }
 701                 robj->prefered_domains = args->value & (AMDGPU_GEM_DOMAIN_VRAM |
 702                                                         AMDGPU_GEM_DOMAIN_GTT |
 703                                                         AMDGPU_GEM_DOMAIN_CPU);
 704                 robj->allowed_domains = robj->prefered_domains;
 705                 if (robj->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
 706                         robj->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
 707
 708                 amdgpu_bo_unreserve(robj);
 709                 break;
 710         default:
 711                 amdgpu_bo_unreserve(robj);
 712                 r = -EINVAL;
 713         }
 714
 715 out:
 716         drm_gem_object_unreference_unlocked(gobj);
 717         return r;
 718 }
 719
 720 int amdgpu_mode_dumb_create(struct drm_file *file_priv,
 721                             struct drm_device *dev,
 722                             struct drm_mode_create_dumb *args)
 723 {
 724         struct amdgpu_device *adev = dev->dev_private;
 725         struct drm_gem_object *gobj;
 726         uint32_t handle;
 727         int r;
 728
 729         args->pitch = amdgpu_align_pitch(adev, args->width,
 730                                          DIV_ROUND_UP(args->bpp, 8), 0);
 731         args->size = (u64)args->pitch * args->height;
 732         args->size = ALIGN(args->size, PAGE_SIZE);
 733
 734         r = amdgpu_gem_object_create(adev, args->size, 0,
 735                                      AMDGPU_GEM_DOMAIN_VRAM,
 736                                      AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
 737                                      ttm_bo_type_device,
 738                                      &gobj);
 739         if (r)
 740                 return -ENOMEM;
 741
 742         r = drm_gem_handle_create(file_priv, gobj, &handle);
 743         /* drop reference from allocate - handle holds it now */
 744         drm_gem_object_unreference_unlocked(gobj);
 745         if (r) {
 746                 return r;
 747         }
 748         args->handle = handle;
 749         return 0;
 750 }
 751
 752 #if defined(CONFIG_DEBUG_FS)
 753 static int amdgpu_debugfs_gem_bo_info(int id, void *ptr, void *data)
 754 {
 755         struct drm_gem_object *gobj = ptr;
 756         struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
 757         struct seq_file *m = data;
 758
 759         unsigned domain;
 760         const char *placement;
 761         unsigned pin_count;
 762
 763         domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
 764         switch (domain) {
 765         case AMDGPU_GEM_DOMAIN_VRAM:
 766                 placement = "VRAM";
 767                 break;
 768         case AMDGPU_GEM_DOMAIN_GTT:
 769                 placement = " GTT";
 770                 break;
 771         case AMDGPU_GEM_DOMAIN_CPU:
 772         default:
 773                 placement = " CPU";
 774                 break;
 775         }
 776         seq_printf(m, "\t0x%08x: %12ld byte %s @ 0x%010Lx",
 777                    id, amdgpu_bo_size(bo), placement,
 778                    amdgpu_bo_gpu_offset(bo));
 779
 780         pin_count = ACCESS_ONCE(bo->pin_count);
 781         if (pin_count)
 782                 seq_printf(m, " pin count %d", pin_count);
 783         seq_printf(m, "\n");
 784
 785         return 0;
 786 }
 787
 788 static int amdgpu_debugfs_gem_info(struct seq_file *m, void *data)
 789 {
 790         struct drm_info_node *node = (struct drm_info_node *)m->private;
 791         struct drm_device *dev = node->minor->dev;
 792         struct drm_file *file;
 793         int r;
 794
 795         r = mutex_lock_interruptible(&dev->filelist_mutex);
 796         if (r)
 797                 return r;
 798
 799         list_for_each_entry(file, &dev->filelist, lhead) {
 800                 struct task_struct *task;
 801
 802                 /*
 803                  * Although we have a valid reference on file->pid, that does
 804                  * not guarantee that the task_struct who called get_pid() is
 805                  * still alive (e.g. get_pid(current) => fork() => exit()).
 806                  * Therefore, we need to protect this ->comm access using RCU.
 807                  */
 808                 rcu_read_lock();
 809                 task = pid_task(file->pid, PIDTYPE_PID);
 810                 seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid),
 811                            task ? task->comm : "<unknown>");
 812                 rcu_read_unlock();
 813
 814                 spin_lock(&file->table_lock);
 815                 idr_for_each(&file->object_idr, amdgpu_debugfs_gem_bo_info, m);
 816                 spin_unlock(&file->table_lock);
 817         }
 818
 819         mutex_unlock(&dev->filelist_mutex);
 820         return 0;
 821 }
 822
 823 static const struct drm_info_list amdgpu_debugfs_gem_list[] = {
 824         {"amdgpu_gem_info", &amdgpu_debugfs_gem_info, 0, NULL},
 825 };
 826 #endif
 827
 828 int amdgpu_gem_debugfs_init(struct amdgpu_device *adev)
 829 {
 830 #if defined(CONFIG_DEBUG_FS)
 831         return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_gem_list, 1);
 832 #endif
 833         return 0;
 834 }