SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/gpu/drm/radeon/radeon_object.c

   1 /*
   2  * Copyright 2009 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Jerome Glisse <glisse@freedesktop.org>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32 #include <linux/list.h>
  33 #include <drm/drmP.h>
  34 #include "radeon_drm.h"
  35 #include "radeon.h"
  36
  37
  38 int radeon_ttm_init(struct radeon_device *rdev);
  39 void radeon_ttm_fini(struct radeon_device *rdev);
  40 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  41
  42 /*
  43  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  44  * function are calling it.
  45  */
  46
  47 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  48 {
  49         struct radeon_bo *bo;
  50
  51         bo = container_of(tbo, struct radeon_bo, tbo);
  52         mutex_lock(&bo->rdev->gem.mutex);
  53         list_del_init(&bo->list);
  54         mutex_unlock(&bo->rdev->gem.mutex);
  55         radeon_bo_clear_surface_reg(bo);
  56         kfree(bo);
  57 }
  58
  59 static inline u32 radeon_ttm_flags_from_domain(u32 domain)
  60 {
  61         u32 flags = 0;
  62
  63         if (domain & RADEON_GEM_DOMAIN_VRAM) {
  64                 flags |= TTM_PL_FLAG_VRAM | TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED;
  65         }
  66         if (domain & RADEON_GEM_DOMAIN_GTT) {
  67                 flags |= TTM_PL_FLAG_TT | TTM_PL_MASK_CACHING;
  68         }
  69         if (domain & RADEON_GEM_DOMAIN_CPU) {
  70                 flags |= TTM_PL_FLAG_SYSTEM | TTM_PL_MASK_CACHING;
  71         }
  72         if (!flags) {
  73                 flags |= TTM_PL_FLAG_SYSTEM | TTM_PL_MASK_CACHING;
  74         }
  75         return flags;
  76 }
  77
  78 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  79 {
  80         u32 c = 0;
  81
  82         rbo->placement.fpfn = 0;
  83         rbo->placement.lpfn = 0;
  84         rbo->placement.placement = rbo->placements;
  85         rbo->placement.busy_placement = rbo->placements;
  86         if (domain & RADEON_GEM_DOMAIN_VRAM)
  87                 rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
  88                                         TTM_PL_FLAG_VRAM;
  89         if (domain & RADEON_GEM_DOMAIN_GTT)
  90                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
  91         if (domain & RADEON_GEM_DOMAIN_CPU)
  92                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  93         rbo->placement.num_placement = c;
  94         rbo->placement.num_busy_placement = c;
  95 }
  96
  97 int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
  98                         unsigned long size, bool kernel, u32 domain,
  99                         struct radeon_bo **bo_ptr)
 100 {
 101         struct radeon_bo *bo;
 102         enum ttm_bo_type type;
 103         u32 flags;
 104         int r;
 105
 106         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 107                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 108         }
 109         if (kernel) {
 110                 type = ttm_bo_type_kernel;
 111         } else {
 112                 type = ttm_bo_type_device;
 113         }
 114         *bo_ptr = NULL;
 115         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 116         if (bo == NULL)
 117                 return -ENOMEM;
 118         bo->rdev = rdev;
 119         bo->gobj = gobj;
 120         bo->surface_reg = -1;
 121         INIT_LIST_HEAD(&bo->list);
 122
 123         flags = radeon_ttm_flags_from_domain(domain);
 124 retry:
 125         r = ttm_buffer_object_init(&rdev->mman.bdev, &bo->tbo, size, type,
 126                                         flags, 0, 0, true, NULL, size,
 127                                         &radeon_ttm_bo_destroy);
 128         if (unlikely(r != 0)) {
 129                 if (r == -ERESTART)
 130                         goto retry;
 131                 /* ttm call radeon_ttm_object_object_destroy if error happen */
 132                 dev_err(rdev->dev, "object_init failed for (%ld, 0x%08X)\n",
 133                         size, flags);
 134                 return r;
 135         }
 136         *bo_ptr = bo;
 137         if (gobj) {
 138                 mutex_lock(&bo->rdev->gem.mutex);
 139                 list_add_tail(&bo->list, &rdev->gem.objects);
 140                 mutex_unlock(&bo->rdev->gem.mutex);
 141         }
 142         return 0;
 143 }
 144
 145 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 146 {
 147         bool is_iomem;
 148         int r;
 149
 150         if (bo->kptr) {
 151                 if (ptr) {
 152                         *ptr = bo->kptr;
 153                 }
 154                 return 0;
 155         }
 156         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 157         if (r) {
 158                 return r;
 159         }
 160         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 161         if (ptr) {
 162                 *ptr = bo->kptr;
 163         }
 164         radeon_bo_check_tiling(bo, 0, 0);
 165         return 0;
 166 }
 167
 168 void radeon_bo_kunmap(struct radeon_bo *bo)
 169 {
 170         if (bo->kptr == NULL)
 171                 return;
 172         bo->kptr = NULL;
 173         radeon_bo_check_tiling(bo, 0, 0);
 174         ttm_bo_kunmap(&bo->kmap);
 175 }
 176
 177 void radeon_bo_unref(struct radeon_bo **bo)
 178 {
 179         struct ttm_buffer_object *tbo;
 180
 181         if ((*bo) == NULL)
 182                 return;
 183         tbo = &((*bo)->tbo);
 184         ttm_bo_unref(&tbo);
 185         if (tbo == NULL)
 186                 *bo = NULL;
 187 }
 188
 189 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 190 {
 191         int r, i;
 192
 193         radeon_ttm_placement_from_domain(bo, domain);
 194         if (bo->pin_count) {
 195                 bo->pin_count++;
 196                 if (gpu_addr)
 197                         *gpu_addr = radeon_bo_gpu_offset(bo);
 198                 return 0;
 199         }
 200         radeon_ttm_placement_from_domain(bo, domain);
 201         for (i = 0; i < bo->placement.num_placement; i++)
 202                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 203 retry:
 204         r = ttm_buffer_object_validate(&bo->tbo, &bo->placement, true, false);
 205         if (likely(r == 0)) {
 206                 bo->pin_count = 1;
 207                 if (gpu_addr != NULL)
 208                         *gpu_addr = radeon_bo_gpu_offset(bo);
 209         }
 210         if (unlikely(r != 0)) {
 211                 if (r == -ERESTART)
 212                         goto retry;
 213                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 214         }
 215         return r;
 216 }
 217
 218 int radeon_bo_unpin(struct radeon_bo *bo)
 219 {
 220         int r, i;
 221
 222         if (!bo->pin_count) {
 223                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 224                 return 0;
 225         }
 226         bo->pin_count--;
 227         if (bo->pin_count)
 228                 return 0;
 229         for (i = 0; i < bo->placement.num_placement; i++)
 230                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 231 retry:
 232         r = ttm_buffer_object_validate(&bo->tbo, &bo->placement, true, false);
 233         if (unlikely(r != 0)) {
 234                 if (r == -ERESTART)
 235                         goto retry;
 236                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 237                 return r;
 238         }
 239         return 0;
 240 }
 241
 242 int radeon_bo_evict_vram(struct radeon_device *rdev)
 243 {
 244         if (rdev->flags & RADEON_IS_IGP) {
 245                 /* Useless to evict on IGP chips */
 246                 return 0;
 247         }
 248         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 249 }
 250
 251 void radeon_bo_force_delete(struct radeon_device *rdev)
 252 {
 253         struct radeon_bo *bo, *n;
 254         struct drm_gem_object *gobj;
 255
 256         if (list_empty(&rdev->gem.objects)) {
 257                 return;
 258         }
 259         dev_err(rdev->dev, "Userspace still has active objects !\n");
 260         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 261                 mutex_lock(&rdev->ddev->struct_mutex);
 262                 gobj = bo->gobj;
 263                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 264                         gobj, bo, (unsigned long)gobj->size,
 265                         *((unsigned long *)&gobj->refcount));
 266                 mutex_lock(&bo->rdev->gem.mutex);
 267                 list_del_init(&bo->list);
 268                 mutex_unlock(&bo->rdev->gem.mutex);
 269                 radeon_bo_unref(&bo);
 270                 gobj->driver_private = NULL;
 271                 drm_gem_object_unreference(gobj);
 272                 mutex_unlock(&rdev->ddev->struct_mutex);
 273         }
 274 }
 275
 276 int radeon_bo_init(struct radeon_device *rdev)
 277 {
 278         /* Add an MTRR for the VRAM */
 279         rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 280                         MTRR_TYPE_WRCOMB, 1);
 281         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 282                 rdev->mc.mc_vram_size >> 20,
 283                 (unsigned long long)rdev->mc.aper_size >> 20);
 284         DRM_INFO("RAM width %dbits %cDR\n",
 285                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 286         return radeon_ttm_init(rdev);
 287 }
 288
 289 void radeon_bo_fini(struct radeon_device *rdev)
 290 {
 291         radeon_ttm_fini(rdev);
 292 }
 293
 294 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 295                                 struct list_head *head)
 296 {
 297         if (lobj->wdomain) {
 298                 list_add(&lobj->list, head);
 299         } else {
 300                 list_add_tail(&lobj->list, head);
 301         }
 302 }
 303
 304 int radeon_bo_list_reserve(struct list_head *head)
 305 {
 306         struct radeon_bo_list *lobj;
 307         int r;
 308
 309         list_for_each_entry(lobj, head, list){
 310                 r = radeon_bo_reserve(lobj->bo, false);
 311                 if (unlikely(r != 0))
 312                         return r;
 313         }
 314         return 0;
 315 }
 316
 317 void radeon_bo_list_unreserve(struct list_head *head)
 318 {
 319         struct radeon_bo_list *lobj;
 320
 321         list_for_each_entry(lobj, head, list) {
 322                 /* only unreserve object we successfully reserved */
 323                 if (radeon_bo_is_reserved(lobj->bo))
 324                         radeon_bo_unreserve(lobj->bo);
 325         }
 326 }
 327
 328 int radeon_bo_list_validate(struct list_head *head, void *fence)
 329 {
 330         struct radeon_bo_list *lobj;
 331         struct radeon_bo *bo;
 332         struct radeon_fence *old_fence = NULL;
 333         int r;
 334
 335         r = radeon_bo_list_reserve(head);
 336         if (unlikely(r != 0)) {
 337                 return r;
 338         }
 339         list_for_each_entry(lobj, head, list) {
 340                 bo = lobj->bo;
 341                 if (!bo->pin_count) {
 342                         if (lobj->wdomain) {
 343                                 radeon_ttm_placement_from_domain(bo,
 344                                                                 lobj->wdomain);
 345                         } else {
 346                                 radeon_ttm_placement_from_domain(bo,
 347                                                                 lobj->rdomain);
 348                         }
 349 retry:
 350                         r = ttm_buffer_object_validate(&bo->tbo,
 351                                                 &bo->placement,
 352                                                 true, false);
 353                         if (unlikely(r)) {
 354                                 if (r == -ERESTART)
 355                                         goto retry;
 356                                 return r;
 357                         }
 358                 }
 359                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 360                 lobj->tiling_flags = bo->tiling_flags;
 361                 if (fence) {
 362                         old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
 363                         bo->tbo.sync_obj = radeon_fence_ref(fence);
 364                         bo->tbo.sync_obj_arg = NULL;
 365                 }
 366                 if (old_fence) {
 367                         radeon_fence_unref(&old_fence);
 368                 }
 369         }
 370         return 0;
 371 }
 372
 373 void radeon_bo_list_unvalidate(struct list_head *head, void *fence)
 374 {
 375         struct radeon_bo_list *lobj;
 376         struct radeon_fence *old_fence;
 377
 378         if (fence)
 379                 list_for_each_entry(lobj, head, list) {
 380                         old_fence = to_radeon_fence(lobj->bo->tbo.sync_obj);
 381                         if (old_fence == fence) {
 382                                 lobj->bo->tbo.sync_obj = NULL;
 383                                 radeon_fence_unref(&old_fence);
 384                         }
 385                 }
 386         radeon_bo_list_unreserve(head);
 387 }
 388
 389 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 390                              struct vm_area_struct *vma)
 391 {
 392         return ttm_fbdev_mmap(vma, &bo->tbo);
 393 }
 394
 395 static int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 396 {
 397         struct radeon_device *rdev = bo->rdev;
 398         struct radeon_surface_reg *reg;
 399         struct radeon_bo *old_object;
 400         int steal;
 401         int i;
 402
 403         BUG_ON(!atomic_read(&bo->tbo.reserved));
 404
 405         if (!bo->tiling_flags)
 406                 return 0;
 407
 408         if (bo->surface_reg >= 0) {
 409                 reg = &rdev->surface_regs[bo->surface_reg];
 410                 i = bo->surface_reg;
 411                 goto out;
 412         }
 413
 414         steal = -1;
 415         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 416
 417                 reg = &rdev->surface_regs[i];
 418                 if (!reg->bo)
 419                         break;
 420
 421                 old_object = reg->bo;
 422                 if (old_object->pin_count == 0)
 423                         steal = i;
 424         }
 425
 426         /* if we are all out */
 427         if (i == RADEON_GEM_MAX_SURFACES) {
 428                 if (steal == -1)
 429                         return -ENOMEM;
 430                 /* find someone with a surface reg and nuke their BO */
 431                 reg = &rdev->surface_regs[steal];
 432                 old_object = reg->bo;
 433                 /* blow away the mapping */
 434                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 435                 ttm_bo_unmap_virtual(&old_object->tbo);
 436                 old_object->surface_reg = -1;
 437                 i = steal;
 438         }
 439
 440         bo->surface_reg = i;
 441         reg->bo = bo;
 442
 443 out:
 444         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 445                                bo->tbo.mem.mm_node->start << PAGE_SHIFT,
 446                                bo->tbo.num_pages << PAGE_SHIFT);
 447         return 0;
 448 }
 449
 450 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 451 {
 452         struct radeon_device *rdev = bo->rdev;
 453         struct radeon_surface_reg *reg;
 454
 455         if (bo->surface_reg == -1)
 456                 return;
 457
 458         reg = &rdev->surface_regs[bo->surface_reg];
 459         radeon_clear_surface_reg(rdev, bo->surface_reg);
 460
 461         reg->bo = NULL;
 462         bo->surface_reg = -1;
 463 }
 464
 465 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 466                                 uint32_t tiling_flags, uint32_t pitch)
 467 {
 468         int r;
 469
 470         r = radeon_bo_reserve(bo, false);
 471         if (unlikely(r != 0))
 472                 return r;
 473         bo->tiling_flags = tiling_flags;
 474         bo->pitch = pitch;
 475         radeon_bo_unreserve(bo);
 476         return 0;
 477 }
 478
 479 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 480                                 uint32_t *tiling_flags,
 481                                 uint32_t *pitch)
 482 {
 483         BUG_ON(!atomic_read(&bo->tbo.reserved));
 484         if (tiling_flags)
 485                 *tiling_flags = bo->tiling_flags;
 486         if (pitch)
 487                 *pitch = bo->pitch;
 488 }
 489
 490 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 491                                 bool force_drop)
 492 {
 493         BUG_ON(!atomic_read(&bo->tbo.reserved));
 494
 495         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 496                 return 0;
 497
 498         if (force_drop) {
 499                 radeon_bo_clear_surface_reg(bo);
 500                 return 0;
 501         }
 502
 503         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 504                 if (!has_moved)
 505                         return 0;
 506
 507                 if (bo->surface_reg >= 0)
 508                         radeon_bo_clear_surface_reg(bo);
 509                 return 0;
 510         }
 511
 512         if ((bo->surface_reg >= 0) && !has_moved)
 513                 return 0;
 514
 515         return radeon_bo_get_surface_reg(bo);
 516 }
 517
 518 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 519                                 struct ttm_mem_reg *mem)
 520 {
 521         struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
 522         radeon_bo_check_tiling(rbo, 0, 1);
 523 }
 524
 525 void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 526 {
 527         struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
 528         radeon_bo_check_tiling(rbo, 0, 0);
 529 }