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/module.h>
  30 #include <linux/pagemap.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-buf.h>
  33
  34 #include <drm/amdgpu_drm.h>
  35 #include <drm/drm_drv.h>
  36 #include <drm/drm_exec.h>
  37 #include <drm/drm_gem_ttm_helper.h>
  38 #include <drm/ttm/ttm_tt.h>
  39
  40 #include "amdgpu.h"
  41 #include "amdgpu_display.h"
  42 #include "amdgpu_dma_buf.h"
  43 #include "amdgpu_hmm.h"
  44 #include "amdgpu_xgmi.h"
  45
  46 static const struct drm_gem_object_funcs amdgpu_gem_object_funcs;
  47
  48 static vm_fault_t amdgpu_gem_fault(struct vm_fault *vmf)
  49 {
  50         struct ttm_buffer_object *bo = vmf->vma->vm_private_data;
  51         struct drm_device *ddev = bo->base.dev;
  52         vm_fault_t ret;
  53         int idx;
  54
  55         ret = ttm_bo_vm_reserve(bo, vmf);
  56         if (ret)
  57                 return ret;
  58
  59         if (drm_dev_enter(ddev, &idx)) {
  60                 ret = amdgpu_bo_fault_reserve_notify(bo);
  61                 if (ret) {
  62                         drm_dev_exit(idx);
  63                         goto unlock;
  64                 }
  65
  66                 ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,
  67                                                TTM_BO_VM_NUM_PREFAULT);
  68
  69                 drm_dev_exit(idx);
  70         } else {
  71                 ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot);
  72         }
  73         if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
  74                 return ret;
  75
  76 unlock:
  77         dma_resv_unlock(bo->base.resv);
  78         return ret;
  79 }
  80
  81 static const struct vm_operations_struct amdgpu_gem_vm_ops = {
  82         .fault = amdgpu_gem_fault,
  83         .open = ttm_bo_vm_open,
  84         .close = ttm_bo_vm_close,
  85         .access = ttm_bo_vm_access
  86 };
  87
  88 static void amdgpu_gem_object_free(struct drm_gem_object *gobj)
  89 {
  90         struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj);
  91
  92         if (robj) {
  93                 amdgpu_hmm_unregister(robj);
  94                 amdgpu_bo_unref(&robj);
  95         }
  96 }
  97
  98 int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
  99                              int alignment, u32 initial_domain,
 100                              u64 flags, enum ttm_bo_type type,
 101                              struct dma_resv *resv,
 102                              struct drm_gem_object **obj, int8_t xcp_id_plus1)
 103 {
 104         struct amdgpu_bo *bo;
 105         struct amdgpu_bo_user *ubo;
 106         struct amdgpu_bo_param bp;
 107         int r;
 108
 109         memset(&bp, 0, sizeof(bp));
 110         *obj = NULL;
 111         flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
 112
 113         bp.size = size;
 114         bp.byte_align = alignment;
 115         bp.type = type;
 116         bp.resv = resv;
 117         bp.preferred_domain = initial_domain;
 118         bp.flags = flags;
 119         bp.domain = initial_domain;
 120         bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 121         bp.xcp_id_plus1 = xcp_id_plus1;
 122
 123         r = amdgpu_bo_create_user(adev, &bp, &ubo);
 124         if (r)
 125                 return r;
 126
 127         bo = &ubo->bo;
 128         *obj = &bo->tbo.base;
 129         (*obj)->funcs = &amdgpu_gem_object_funcs;
 130
 131         return 0;
 132 }
 133
 134 void amdgpu_gem_force_release(struct amdgpu_device *adev)
 135 {
 136         struct drm_device *ddev = adev_to_drm(adev);
 137         struct drm_file *file;
 138
 139         mutex_lock(&ddev->filelist_mutex);
 140
 141         list_for_each_entry(file, &ddev->filelist, lhead) {
 142                 struct drm_gem_object *gobj;
 143                 int handle;
 144
 145                 WARN_ONCE(1, "Still active user space clients!\n");
 146                 spin_lock(&file->table_lock);
 147                 idr_for_each_entry(&file->object_idr, gobj, handle) {
 148                         WARN_ONCE(1, "And also active allocations!\n");
 149                         drm_gem_object_put(gobj);
 150                 }
 151                 idr_destroy(&file->object_idr);
 152                 spin_unlock(&file->table_lock);
 153         }
 154
 155         mutex_unlock(&ddev->filelist_mutex);
 156 }
 157
 158 /*
 159  * Call from drm_gem_handle_create which appear in both new and open ioctl
 160  * case.
 161  */
 162 static int amdgpu_gem_object_open(struct drm_gem_object *obj,
 163                                   struct drm_file *file_priv)
 164 {
 165         struct amdgpu_bo *abo = gem_to_amdgpu_bo(obj);
 166         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
 167         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 168         struct amdgpu_vm *vm = &fpriv->vm;
 169         struct amdgpu_bo_va *bo_va;
 170         struct mm_struct *mm;
 171         int r;
 172
 173         mm = amdgpu_ttm_tt_get_usermm(abo->tbo.ttm);
 174         if (mm && mm != current->mm)
 175                 return -EPERM;
 176
 177         if (abo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID &&
 178             !amdgpu_vm_is_bo_always_valid(vm, abo))
 179                 return -EPERM;
 180
 181         r = amdgpu_bo_reserve(abo, false);
 182         if (r)
 183                 return r;
 184
 185         bo_va = amdgpu_vm_bo_find(vm, abo);
 186         if (!bo_va)
 187                 bo_va = amdgpu_vm_bo_add(adev, vm, abo);
 188         else
 189                 ++bo_va->ref_count;
 190         amdgpu_bo_unreserve(abo);
 191
 192         /* Validate and add eviction fence to DMABuf imports with dynamic
 193          * attachment in compute VMs. Re-validation will be done by
 194          * amdgpu_vm_validate. Fences are on the reservation shared with the
 195          * export, which is currently required to be validated and fenced
 196          * already by amdgpu_amdkfd_gpuvm_restore_process_bos.
 197          *
 198          * Nested locking below for the case that a GEM object is opened in
 199          * kfd_mem_export_dmabuf. Since the lock below is only taken for imports,
 200          * but not for export, this is a different lock class that cannot lead to
 201          * circular lock dependencies.
 202          */
 203         if (!vm->is_compute_context || !vm->process_info)
 204                 return 0;
 205         if (!obj->import_attach ||
 206             !dma_buf_is_dynamic(obj->import_attach->dmabuf))
 207                 return 0;
 208         mutex_lock_nested(&vm->process_info->lock, 1);
 209         if (!WARN_ON(!vm->process_info->eviction_fence)) {
 210                 r = amdgpu_amdkfd_bo_validate_and_fence(abo, AMDGPU_GEM_DOMAIN_GTT,
 211                                                         &vm->process_info->eviction_fence->base);
 212                 if (r) {
 213                         struct amdgpu_task_info *ti = amdgpu_vm_get_task_info_vm(vm);
 214
 215                         dev_warn(adev->dev, "validate_and_fence failed: %d\n", r);
 216                         if (ti) {
 217                                 dev_warn(adev->dev, "pid %d\n", ti->pid);
 218                                 amdgpu_vm_put_task_info(ti);
 219                         }
 220                 }
 221         }
 222         mutex_unlock(&vm->process_info->lock);
 223
 224         return r;
 225 }
 226
 227 static void amdgpu_gem_object_close(struct drm_gem_object *obj,
 228                                     struct drm_file *file_priv)
 229 {
 230         struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
 231         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 232         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 233         struct amdgpu_vm *vm = &fpriv->vm;
 234
 235         struct dma_fence *fence = NULL;
 236         struct amdgpu_bo_va *bo_va;
 237         struct drm_exec exec;
 238         long r;
 239
 240         drm_exec_init(&exec, DRM_EXEC_IGNORE_DUPLICATES, 0);
 241         drm_exec_until_all_locked(&exec) {
 242                 r = drm_exec_prepare_obj(&exec, &bo->tbo.base, 1);
 243                 drm_exec_retry_on_contention(&exec);
 244                 if (unlikely(r))
 245                         goto out_unlock;
 246
 247                 r = amdgpu_vm_lock_pd(vm, &exec, 0);
 248                 drm_exec_retry_on_contention(&exec);
 249                 if (unlikely(r))
 250                         goto out_unlock;
 251         }
 252
 253         bo_va = amdgpu_vm_bo_find(vm, bo);
 254         if (!bo_va || --bo_va->ref_count)
 255                 goto out_unlock;
 256
 257         amdgpu_vm_bo_del(adev, bo_va);
 258         if (!amdgpu_vm_ready(vm))
 259                 goto out_unlock;
 260
 261         r = amdgpu_vm_clear_freed(adev, vm, &fence);
 262         if (unlikely(r < 0))
 263                 dev_err(adev->dev, "failed to clear page "
 264                         "tables on GEM object close (%ld)\n", r);
 265         if (r || !fence)
 266                 goto out_unlock;
 267
 268         amdgpu_bo_fence(bo, fence, true);
 269         dma_fence_put(fence);
 270
 271 out_unlock:
 272         if (r)
 273                 dev_err(adev->dev, "leaking bo va (%ld)\n", r);
 274         drm_exec_fini(&exec);
 275 }
 276
 277 static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
 278 {
 279         struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
 280
 281         if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
 282                 return -EPERM;
 283         if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 284                 return -EPERM;
 285
 286         /* Workaround for Thunk bug creating PROT_NONE,MAP_PRIVATE mappings
 287          * for debugger access to invisible VRAM. Should have used MAP_SHARED
 288          * instead. Clearing VM_MAYWRITE prevents the mapping from ever
 289          * becoming writable and makes is_cow_mapping(vm_flags) false.
 290          */
 291         if (is_cow_mapping(vma->vm_flags) &&
 292             !(vma->vm_flags & VM_ACCESS_FLAGS))
 293                 vm_flags_clear(vma, VM_MAYWRITE);
 294
 295         return drm_gem_ttm_mmap(obj, vma);
 296 }
 297
 298 static const struct drm_gem_object_funcs amdgpu_gem_object_funcs = {
 299         .free = amdgpu_gem_object_free,
 300         .open = amdgpu_gem_object_open,
 301         .close = amdgpu_gem_object_close,
 302         .export = amdgpu_gem_prime_export,
 303         .vmap = drm_gem_ttm_vmap,
 304         .vunmap = drm_gem_ttm_vunmap,
 305         .mmap = amdgpu_gem_object_mmap,
 306         .vm_ops = &amdgpu_gem_vm_ops,
 307 };
 308
 309 /*
 310  * GEM ioctls.
 311  */
 312 int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 313                             struct drm_file *filp)
 314 {
 315         struct amdgpu_device *adev = drm_to_adev(dev);
 316         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 317         struct amdgpu_vm *vm = &fpriv->vm;
 318         union drm_amdgpu_gem_create *args = data;
 319         uint64_t flags = args->in.domain_flags;
 320         uint64_t size = args->in.bo_size;
 321         struct dma_resv *resv = NULL;
 322         struct drm_gem_object *gobj;
 323         uint32_t handle, initial_domain;
 324         int r;
 325
 326         /* reject DOORBELLs until userspace code to use it is available */
 327         if (args->in.domains & AMDGPU_GEM_DOMAIN_DOORBELL)
 328                 return -EINVAL;
 329
 330         /* reject invalid gem flags */
 331         if (flags & ~(AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 332                       AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
 333                       AMDGPU_GEM_CREATE_CPU_GTT_USWC |
 334                       AMDGPU_GEM_CREATE_VRAM_CLEARED |
 335                       AMDGPU_GEM_CREATE_VM_ALWAYS_VALID |
 336                       AMDGPU_GEM_CREATE_EXPLICIT_SYNC |
 337                       AMDGPU_GEM_CREATE_ENCRYPTED |
 338                       AMDGPU_GEM_CREATE_GFX12_DCC |
 339                       AMDGPU_GEM_CREATE_DISCARDABLE))
 340                 return -EINVAL;
 341
 342         /* reject invalid gem domains */
 343         if (args->in.domains & ~AMDGPU_GEM_DOMAIN_MASK)
 344                 return -EINVAL;
 345
 346         if (!amdgpu_is_tmz(adev) && (flags & AMDGPU_GEM_CREATE_ENCRYPTED)) {
 347                 DRM_NOTE_ONCE("Cannot allocate secure buffer since TMZ is disabled\n");
 348                 return -EINVAL;
 349         }
 350
 351         /* create a gem object to contain this object in */
 352         if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS |
 353             AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
 354                 if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
 355                         /* if gds bo is created from user space, it must be
 356                          * passed to bo list
 357                          */
 358                         DRM_ERROR("GDS bo cannot be per-vm-bo\n");
 359                         return -EINVAL;
 360                 }
 361                 flags |= AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
 362         }
 363
 364         if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
 365                 r = amdgpu_bo_reserve(vm->root.bo, false);
 366                 if (r)
 367                         return r;
 368
 369                 resv = vm->root.bo->tbo.base.resv;
 370         }
 371
 372         initial_domain = (u32)(0xffffffff & args->in.domains);
 373 retry:
 374         r = amdgpu_gem_object_create(adev, size, args->in.alignment,
 375                                      initial_domain,
 376                                      flags, ttm_bo_type_device, resv, &gobj, fpriv->xcp_id + 1);
 377         if (r && r != -ERESTARTSYS) {
 378                 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
 379                         flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 380                         goto retry;
 381                 }
 382
 383                 if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
 384                         initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
 385                         goto retry;
 386                 }
 387                 DRM_DEBUG("Failed to allocate GEM object (%llu, %d, %llu, %d)\n",
 388                                 size, initial_domain, args->in.alignment, r);
 389         }
 390
 391         if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
 392                 if (!r) {
 393                         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 394
 395                         abo->parent = amdgpu_bo_ref(vm->root.bo);
 396                 }
 397                 amdgpu_bo_unreserve(vm->root.bo);
 398         }
 399         if (r)
 400                 return r;
 401
 402         r = drm_gem_handle_create(filp, gobj, &handle);
 403         /* drop reference from allocate - handle holds it now */
 404         drm_gem_object_put(gobj);
 405         if (r)
 406                 return r;
 407
 408         memset(args, 0, sizeof(*args));
 409         args->out.handle = handle;
 410         return 0;
 411 }
 412
 413 int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
 414                              struct drm_file *filp)
 415 {
 416         struct ttm_operation_ctx ctx = { true, false };
 417         struct amdgpu_device *adev = drm_to_adev(dev);
 418         struct drm_amdgpu_gem_userptr *args = data;
 419         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 420         struct drm_gem_object *gobj;
 421         struct hmm_range *range;
 422         struct amdgpu_bo *bo;
 423         uint32_t handle;
 424         int r;
 425
 426         args->addr = untagged_addr(args->addr);
 427
 428         if (offset_in_page(args->addr | args->size))
 429                 return -EINVAL;
 430
 431         /* reject unknown flag values */
 432         if (args->flags & ~(AMDGPU_GEM_USERPTR_READONLY |
 433             AMDGPU_GEM_USERPTR_ANONONLY | AMDGPU_GEM_USERPTR_VALIDATE |
 434             AMDGPU_GEM_USERPTR_REGISTER))
 435                 return -EINVAL;
 436
 437         if (!(args->flags & AMDGPU_GEM_USERPTR_READONLY) &&
 438              !(args->flags & AMDGPU_GEM_USERPTR_REGISTER)) {
 439
 440                 /* if we want to write to it we must install a MMU notifier */
 441                 return -EACCES;
 442         }
 443
 444         /* create a gem object to contain this object in */
 445         r = amdgpu_gem_object_create(adev, args->size, 0, AMDGPU_GEM_DOMAIN_CPU,
 446                                      0, ttm_bo_type_device, NULL, &gobj, fpriv->xcp_id + 1);
 447         if (r)
 448                 return r;
 449
 450         bo = gem_to_amdgpu_bo(gobj);
 451         bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT;
 452         bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
 453         r = amdgpu_ttm_tt_set_userptr(&bo->tbo, args->addr, args->flags);
 454         if (r)
 455                 goto release_object;
 456
 457         r = amdgpu_hmm_register(bo, args->addr);
 458         if (r)
 459                 goto release_object;
 460
 461         if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
 462                 r = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages,
 463                                                  &range);
 464                 if (r)
 465                         goto release_object;
 466
 467                 r = amdgpu_bo_reserve(bo, true);
 468                 if (r)
 469                         goto user_pages_done;
 470
 471                 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
 472                 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 473                 amdgpu_bo_unreserve(bo);
 474                 if (r)
 475                         goto user_pages_done;
 476         }
 477
 478         r = drm_gem_handle_create(filp, gobj, &handle);
 479         if (r)
 480                 goto user_pages_done;
 481
 482         args->handle = handle;
 483
 484 user_pages_done:
 485         if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE)
 486                 amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, range);
 487
 488 release_object:
 489         drm_gem_object_put(gobj);
 490
 491         return r;
 492 }
 493
 494 int amdgpu_mode_dumb_mmap(struct drm_file *filp,
 495                           struct drm_device *dev,
 496                           uint32_t handle, uint64_t *offset_p)
 497 {
 498         struct drm_gem_object *gobj;
 499         struct amdgpu_bo *robj;
 500
 501         gobj = drm_gem_object_lookup(filp, handle);
 502         if (!gobj)
 503                 return -ENOENT;
 504
 505         robj = gem_to_amdgpu_bo(gobj);
 506         if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm) ||
 507             (robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
 508                 drm_gem_object_put(gobj);
 509                 return -EPERM;
 510         }
 511         *offset_p = amdgpu_bo_mmap_offset(robj);
 512         drm_gem_object_put(gobj);
 513         return 0;
 514 }
 515
 516 int amdgpu_gem_mmap_ioctl(struct drm_device *dev, void *data,
 517                           struct drm_file *filp)
 518 {
 519         union drm_amdgpu_gem_mmap *args = data;
 520         uint32_t handle = args->in.handle;
 521
 522         memset(args, 0, sizeof(*args));
 523         return amdgpu_mode_dumb_mmap(filp, dev, handle, &args->out.addr_ptr);
 524 }
 525
 526 /**
 527  * amdgpu_gem_timeout - calculate jiffies timeout from absolute value
 528  *
 529  * @timeout_ns: timeout in ns
 530  *
 531  * Calculate the timeout in jiffies from an absolute timeout in ns.
 532  */
 533 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns)
 534 {
 535         unsigned long timeout_jiffies;
 536         ktime_t timeout;
 537
 538         /* clamp timeout if it's to large */
 539         if (((int64_t)timeout_ns) < 0)
 540                 return MAX_SCHEDULE_TIMEOUT;
 541
 542         timeout = ktime_sub(ns_to_ktime(timeout_ns), ktime_get());
 543         if (ktime_to_ns(timeout) < 0)
 544                 return 0;
 545
 546         timeout_jiffies = nsecs_to_jiffies(ktime_to_ns(timeout));
 547         /*  clamp timeout to avoid unsigned-> signed overflow */
 548         if (timeout_jiffies > MAX_SCHEDULE_TIMEOUT)
 549                 return MAX_SCHEDULE_TIMEOUT - 1;
 550
 551         return timeout_jiffies;
 552 }
 553
 554 int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 555                               struct drm_file *filp)
 556 {
 557         union drm_amdgpu_gem_wait_idle *args = data;
 558         struct drm_gem_object *gobj;
 559         struct amdgpu_bo *robj;
 560         uint32_t handle = args->in.handle;
 561         unsigned long timeout = amdgpu_gem_timeout(args->in.timeout);
 562         int r = 0;
 563         long ret;
 564
 565         gobj = drm_gem_object_lookup(filp, handle);
 566         if (!gobj)
 567                 return -ENOENT;
 568
 569         robj = gem_to_amdgpu_bo(gobj);
 570         ret = dma_resv_wait_timeout(robj->tbo.base.resv, DMA_RESV_USAGE_READ,
 571                                     true, timeout);
 572
 573         /* ret == 0 means not signaled,
 574          * ret > 0 means signaled
 575          * ret < 0 means interrupted before timeout
 576          */
 577         if (ret >= 0) {
 578                 memset(args, 0, sizeof(*args));
 579                 args->out.status = (ret == 0);
 580         } else
 581                 r = ret;
 582
 583         drm_gem_object_put(gobj);
 584         return r;
 585 }
 586
 587 int amdgpu_gem_metadata_ioctl(struct drm_device *dev, void *data,
 588                                 struct drm_file *filp)
 589 {
 590         struct drm_amdgpu_gem_metadata *args = data;
 591         struct drm_gem_object *gobj;
 592         struct amdgpu_bo *robj;
 593         int r = -1;
 594
 595         DRM_DEBUG("%d\n", args->handle);
 596         gobj = drm_gem_object_lookup(filp, args->handle);
 597         if (gobj == NULL)
 598                 return -ENOENT;
 599         robj = gem_to_amdgpu_bo(gobj);
 600
 601         r = amdgpu_bo_reserve(robj, false);
 602         if (unlikely(r != 0))
 603                 goto out;
 604
 605         if (args->op == AMDGPU_GEM_METADATA_OP_GET_METADATA) {
 606                 amdgpu_bo_get_tiling_flags(robj, &args->data.tiling_info);
 607                 r = amdgpu_bo_get_metadata(robj, args->data.data,
 608                                            sizeof(args->data.data),
 609                                            &args->data.data_size_bytes,
 610                                            &args->data.flags);
 611         } else if (args->op == AMDGPU_GEM_METADATA_OP_SET_METADATA) {
 612                 if (args->data.data_size_bytes > sizeof(args->data.data)) {
 613                         r = -EINVAL;
 614                         goto unreserve;
 615                 }
 616                 r = amdgpu_bo_set_tiling_flags(robj, args->data.tiling_info);
 617                 if (!r)
 618                         r = amdgpu_bo_set_metadata(robj, args->data.data,
 619                                                    args->data.data_size_bytes,
 620                                                    args->data.flags);
 621         }
 622
 623 unreserve:
 624         amdgpu_bo_unreserve(robj);
 625 out:
 626         drm_gem_object_put(gobj);
 627         return r;
 628 }
 629
 630 /**
 631  * amdgpu_gem_va_update_vm -update the bo_va in its VM
 632  *
 633  * @adev: amdgpu_device pointer
 634  * @vm: vm to update
 635  * @bo_va: bo_va to update
 636  * @operation: map, unmap or clear
 637  *
 638  * Update the bo_va directly after setting its address. Errors are not
 639  * vital here, so they are not reported back to userspace.
 640  */
 641 static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
 642                                     struct amdgpu_vm *vm,
 643                                     struct amdgpu_bo_va *bo_va,
 644                                     uint32_t operation)
 645 {
 646         int r;
 647
 648         if (!amdgpu_vm_ready(vm))
 649                 return;
 650
 651         r = amdgpu_vm_clear_freed(adev, vm, NULL);
 652         if (r)
 653                 goto error;
 654
 655         if (operation == AMDGPU_VA_OP_MAP ||
 656             operation == AMDGPU_VA_OP_REPLACE) {
 657                 r = amdgpu_vm_bo_update(adev, bo_va, false);
 658                 if (r)
 659                         goto error;
 660         }
 661
 662         r = amdgpu_vm_update_pdes(adev, vm, false);
 663
 664 error:
 665         if (r && r != -ERESTARTSYS)
 666                 DRM_ERROR("Couldn't update BO_VA (%d)\n", r);
 667 }
 668
 669 /**
 670  * amdgpu_gem_va_map_flags - map GEM UAPI flags into hardware flags
 671  *
 672  * @adev: amdgpu_device pointer
 673  * @flags: GEM UAPI flags
 674  *
 675  * Returns the GEM UAPI flags mapped into hardware for the ASIC.
 676  */
 677 uint64_t amdgpu_gem_va_map_flags(struct amdgpu_device *adev, uint32_t flags)
 678 {
 679         uint64_t pte_flag = 0;
 680
 681         if (flags & AMDGPU_VM_PAGE_EXECUTABLE)
 682                 pte_flag |= AMDGPU_PTE_EXECUTABLE;
 683         if (flags & AMDGPU_VM_PAGE_READABLE)
 684                 pte_flag |= AMDGPU_PTE_READABLE;
 685         if (flags & AMDGPU_VM_PAGE_WRITEABLE)
 686                 pte_flag |= AMDGPU_PTE_WRITEABLE;
 687         if (flags & AMDGPU_VM_PAGE_PRT)
 688                 pte_flag |= AMDGPU_PTE_PRT_FLAG(adev);
 689         if (flags & AMDGPU_VM_PAGE_NOALLOC)
 690                 pte_flag |= AMDGPU_PTE_NOALLOC;
 691
 692         if (adev->gmc.gmc_funcs->map_mtype)
 693                 pte_flag |= amdgpu_gmc_map_mtype(adev,
 694                                                  flags & AMDGPU_VM_MTYPE_MASK);
 695
 696         return pte_flag;
 697 }
 698
 699 int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
 700                           struct drm_file *filp)
 701 {
 702         const uint32_t valid_flags = AMDGPU_VM_DELAY_UPDATE |
 703                 AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_PAGE_WRITEABLE |
 704                 AMDGPU_VM_PAGE_EXECUTABLE | AMDGPU_VM_MTYPE_MASK |
 705                 AMDGPU_VM_PAGE_NOALLOC;
 706         const uint32_t prt_flags = AMDGPU_VM_DELAY_UPDATE |
 707                 AMDGPU_VM_PAGE_PRT;
 708
 709         struct drm_amdgpu_gem_va *args = data;
 710         struct drm_gem_object *gobj;
 711         struct amdgpu_device *adev = drm_to_adev(dev);
 712         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 713         struct amdgpu_bo *abo;
 714         struct amdgpu_bo_va *bo_va;
 715         struct drm_exec exec;
 716         uint64_t va_flags;
 717         uint64_t vm_size;
 718         int r = 0;
 719
 720         if (args->va_address < AMDGPU_VA_RESERVED_BOTTOM) {
 721                 dev_dbg(dev->dev,
 722                         "va_address 0x%llx is in reserved area 0x%llx\n",
 723                         args->va_address, AMDGPU_VA_RESERVED_BOTTOM);
 724                 return -EINVAL;
 725         }
 726
 727         if (args->va_address >= AMDGPU_GMC_HOLE_START &&
 728             args->va_address < AMDGPU_GMC_HOLE_END) {
 729                 dev_dbg(dev->dev,
 730                         "va_address 0x%llx is in VA hole 0x%llx-0x%llx\n",
 731                         args->va_address, AMDGPU_GMC_HOLE_START,
 732                         AMDGPU_GMC_HOLE_END);
 733                 return -EINVAL;
 734         }
 735
 736         args->va_address &= AMDGPU_GMC_HOLE_MASK;
 737
 738         vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
 739         vm_size -= AMDGPU_VA_RESERVED_TOP;
 740         if (args->va_address + args->map_size > vm_size) {
 741                 dev_dbg(dev->dev,
 742                         "va_address 0x%llx is in top reserved area 0x%llx\n",
 743                         args->va_address + args->map_size, vm_size);
 744                 return -EINVAL;
 745         }
 746
 747         if ((args->flags & ~valid_flags) && (args->flags & ~prt_flags)) {
 748                 dev_dbg(dev->dev, "invalid flags combination 0x%08X\n",
 749                         args->flags);
 750                 return -EINVAL;
 751         }
 752
 753         switch (args->operation) {
 754         case AMDGPU_VA_OP_MAP:
 755         case AMDGPU_VA_OP_UNMAP:
 756         case AMDGPU_VA_OP_CLEAR:
 757         case AMDGPU_VA_OP_REPLACE:
 758                 break;
 759         default:
 760                 dev_dbg(dev->dev, "unsupported operation %d\n",
 761                         args->operation);
 762                 return -EINVAL;
 763         }
 764
 765         if ((args->operation != AMDGPU_VA_OP_CLEAR) &&
 766             !(args->flags & AMDGPU_VM_PAGE_PRT)) {
 767                 gobj = drm_gem_object_lookup(filp, args->handle);
 768                 if (gobj == NULL)
 769                         return -ENOENT;
 770                 abo = gem_to_amdgpu_bo(gobj);
 771         } else {
 772                 gobj = NULL;
 773                 abo = NULL;
 774         }
 775
 776         drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT |
 777                       DRM_EXEC_IGNORE_DUPLICATES, 0);
 778         drm_exec_until_all_locked(&exec) {
 779                 if (gobj) {
 780                         r = drm_exec_lock_obj(&exec, gobj);
 781                         drm_exec_retry_on_contention(&exec);
 782                         if (unlikely(r))
 783                                 goto error;
 784                 }
 785
 786                 r = amdgpu_vm_lock_pd(&fpriv->vm, &exec, 2);
 787                 drm_exec_retry_on_contention(&exec);
 788                 if (unlikely(r))
 789                         goto error;
 790         }
 791
 792         if (abo) {
 793                 bo_va = amdgpu_vm_bo_find(&fpriv->vm, abo);
 794                 if (!bo_va) {
 795                         r = -ENOENT;
 796                         goto error;
 797                 }
 798         } else if (args->operation != AMDGPU_VA_OP_CLEAR) {
 799                 bo_va = fpriv->prt_va;
 800         } else {
 801                 bo_va = NULL;
 802         }
 803
 804         switch (args->operation) {
 805         case AMDGPU_VA_OP_MAP:
 806                 va_flags = amdgpu_gem_va_map_flags(adev, args->flags);
 807                 r = amdgpu_vm_bo_map(adev, bo_va, args->va_address,
 808                                      args->offset_in_bo, args->map_size,
 809                                      va_flags);
 810                 break;
 811         case AMDGPU_VA_OP_UNMAP:
 812                 r = amdgpu_vm_bo_unmap(adev, bo_va, args->va_address);
 813                 break;
 814
 815         case AMDGPU_VA_OP_CLEAR:
 816                 r = amdgpu_vm_bo_clear_mappings(adev, &fpriv->vm,
 817                                                 args->va_address,
 818                                                 args->map_size);
 819                 break;
 820         case AMDGPU_VA_OP_REPLACE:
 821                 va_flags = amdgpu_gem_va_map_flags(adev, args->flags);
 822                 r = amdgpu_vm_bo_replace_map(adev, bo_va, args->va_address,
 823                                              args->offset_in_bo, args->map_size,
 824                                              va_flags);
 825                 break;
 826         default:
 827                 break;
 828         }
 829         if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE) && !adev->debug_vm)
 830                 amdgpu_gem_va_update_vm(adev, &fpriv->vm, bo_va,
 831                                         args->operation);
 832
 833 error:
 834         drm_exec_fini(&exec);
 835         drm_gem_object_put(gobj);
 836         return r;
 837 }
 838
 839 int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
 840                         struct drm_file *filp)
 841 {
 842         struct amdgpu_device *adev = drm_to_adev(dev);
 843         struct drm_amdgpu_gem_op *args = data;
 844         struct drm_gem_object *gobj;
 845         struct amdgpu_vm_bo_base *base;
 846         struct amdgpu_bo *robj;
 847         int r;
 848
 849         gobj = drm_gem_object_lookup(filp, args->handle);
 850         if (!gobj)
 851                 return -ENOENT;
 852
 853         robj = gem_to_amdgpu_bo(gobj);
 854
 855         r = amdgpu_bo_reserve(robj, false);
 856         if (unlikely(r))
 857                 goto out;
 858
 859         switch (args->op) {
 860         case AMDGPU_GEM_OP_GET_GEM_CREATE_INFO: {
 861                 struct drm_amdgpu_gem_create_in info;
 862                 void __user *out = u64_to_user_ptr(args->value);
 863
 864                 info.bo_size = robj->tbo.base.size;
 865                 info.alignment = robj->tbo.page_alignment << PAGE_SHIFT;
 866                 info.domains = robj->preferred_domains;
 867                 info.domain_flags = robj->flags;
 868                 amdgpu_bo_unreserve(robj);
 869                 if (copy_to_user(out, &info, sizeof(info)))
 870                         r = -EFAULT;
 871                 break;
 872         }
 873         case AMDGPU_GEM_OP_SET_PLACEMENT:
 874                 if (robj->tbo.base.import_attach &&
 875                     args->value & AMDGPU_GEM_DOMAIN_VRAM) {
 876                         r = -EINVAL;
 877                         amdgpu_bo_unreserve(robj);
 878                         break;
 879                 }
 880                 if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm)) {
 881                         r = -EPERM;
 882                         amdgpu_bo_unreserve(robj);
 883                         break;
 884                 }
 885                 for (base = robj->vm_bo; base; base = base->next)
 886                         if (amdgpu_xgmi_same_hive(amdgpu_ttm_adev(robj->tbo.bdev),
 887                                 amdgpu_ttm_adev(base->vm->root.bo->tbo.bdev))) {
 888                                 r = -EINVAL;
 889                                 amdgpu_bo_unreserve(robj);
 890                                 goto out;
 891                         }
 892
 893
 894                 robj->preferred_domains = args->value & (AMDGPU_GEM_DOMAIN_VRAM |
 895                                                         AMDGPU_GEM_DOMAIN_GTT |
 896                                                         AMDGPU_GEM_DOMAIN_CPU);
 897                 robj->allowed_domains = robj->preferred_domains;
 898                 if (robj->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
 899                         robj->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
 900
 901                 if (robj->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
 902                         amdgpu_vm_bo_invalidate(adev, robj, true);
 903
 904                 amdgpu_bo_unreserve(robj);
 905                 break;
 906         default:
 907                 amdgpu_bo_unreserve(robj);
 908                 r = -EINVAL;
 909         }
 910
 911 out:
 912         drm_gem_object_put(gobj);
 913         return r;
 914 }
 915
 916 static int amdgpu_gem_align_pitch(struct amdgpu_device *adev,
 917                                   int width,
 918                                   int cpp,
 919                                   bool tiled)
 920 {
 921         int aligned = width;
 922         int pitch_mask = 0;
 923
 924         switch (cpp) {
 925         case 1:
 926                 pitch_mask = 255;
 927                 break;
 928         case 2:
 929                 pitch_mask = 127;
 930                 break;
 931         case 3:
 932         case 4:
 933                 pitch_mask = 63;
 934                 break;
 935         }
 936
 937         aligned += pitch_mask;
 938         aligned &= ~pitch_mask;
 939         return aligned * cpp;
 940 }
 941
 942 int amdgpu_mode_dumb_create(struct drm_file *file_priv,
 943                             struct drm_device *dev,
 944                             struct drm_mode_create_dumb *args)
 945 {
 946         struct amdgpu_device *adev = drm_to_adev(dev);
 947         struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
 948         struct drm_gem_object *gobj;
 949         uint32_t handle;
 950         u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 951                     AMDGPU_GEM_CREATE_CPU_GTT_USWC |
 952                     AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
 953         u32 domain;
 954         int r;
 955
 956         /*
 957          * The buffer returned from this function should be cleared, but
 958          * it can only be done if the ring is enabled or we'll fail to
 959          * create the buffer.
 960          */
 961         if (adev->mman.buffer_funcs_enabled)
 962                 flags |= AMDGPU_GEM_CREATE_VRAM_CLEARED;
 963
 964         args->pitch = amdgpu_gem_align_pitch(adev, args->width,
 965                                              DIV_ROUND_UP(args->bpp, 8), 0);
 966         args->size = (u64)args->pitch * args->height;
 967         args->size = ALIGN(args->size, PAGE_SIZE);
 968         domain = amdgpu_bo_get_preferred_domain(adev,
 969                                 amdgpu_display_supported_domains(adev, flags));
 970         r = amdgpu_gem_object_create(adev, args->size, 0, domain, flags,
 971                                      ttm_bo_type_device, NULL, &gobj, fpriv->xcp_id + 1);
 972         if (r)
 973                 return -ENOMEM;
 974
 975         r = drm_gem_handle_create(file_priv, gobj, &handle);
 976         /* drop reference from allocate - handle holds it now */
 977         drm_gem_object_put(gobj);
 978         if (r)
 979                 return r;
 980
 981         args->handle = handle;
 982         return 0;
 983 }
 984
 985 #if defined(CONFIG_DEBUG_FS)
 986 static int amdgpu_debugfs_gem_info_show(struct seq_file *m, void *unused)
 987 {
 988         struct amdgpu_device *adev = m->private;
 989         struct drm_device *dev = adev_to_drm(adev);
 990         struct drm_file *file;
 991         int r;
 992
 993         r = mutex_lock_interruptible(&dev->filelist_mutex);
 994         if (r)
 995                 return r;
 996
 997         list_for_each_entry(file, &dev->filelist, lhead) {
 998                 struct task_struct *task;
 999                 struct drm_gem_object *gobj;
1000                 struct pid *pid;
1001                 int id;
1002
1003                 /*
1004                  * Although we have a valid reference on file->pid, that does
1005                  * not guarantee that the task_struct who called get_pid() is
1006                  * still alive (e.g. get_pid(current) => fork() => exit()).
1007                  * Therefore, we need to protect this ->comm access using RCU.
1008                  */
1009                 rcu_read_lock();
1010                 pid = rcu_dereference(file->pid);
1011                 task = pid_task(pid, PIDTYPE_TGID);
1012                 seq_printf(m, "pid %8d command %s:\n", pid_nr(pid),
1013                            task ? task->comm : "<unknown>");
1014                 rcu_read_unlock();
1015
1016                 spin_lock(&file->table_lock);
1017                 idr_for_each_entry(&file->object_idr, gobj, id) {
1018                         struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
1019
1020                         amdgpu_bo_print_info(id, bo, m);
1021                 }
1022                 spin_unlock(&file->table_lock);
1023         }
1024
1025         mutex_unlock(&dev->filelist_mutex);
1026         return 0;
1027 }
1028
1029 DEFINE_SHOW_ATTRIBUTE(amdgpu_debugfs_gem_info);
1030
1031 #endif
1032
1033 void amdgpu_debugfs_gem_init(struct amdgpu_device *adev)
1034 {
1035 #if defined(CONFIG_DEBUG_FS)
1036         struct drm_minor *minor = adev_to_drm(adev)->primary;
1037         struct dentry *root = minor->debugfs_root;
1038
1039         debugfs_create_file("amdgpu_gem_info", 0444, root, adev,
1040                             &amdgpu_debugfs_gem_info_fops);
1041 #endif
1042 }