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