release/src-rt-6.x.4708/linux/linux-2.6.36/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 <linux/slab.h>
  34 #include <drm/drmP.h>
  35 #include "radeon_drm.h"
  36 #include "radeon.h"
  37
  38
  39 int radeon_ttm_init(struct radeon_device *rdev);
  40 void radeon_ttm_fini(struct radeon_device *rdev);
  41 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  42
  43 /*
  44  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  45  * function are calling it.
  46  */
  47
  48 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  49 {
  50         struct radeon_bo *bo;
  51
  52         bo = container_of(tbo, struct radeon_bo, tbo);
  53         mutex_lock(&bo->rdev->gem.mutex);
  54         list_del_init(&bo->list);
  55         mutex_unlock(&bo->rdev->gem.mutex);
  56         radeon_bo_clear_surface_reg(bo);
  57         kfree(bo);
  58 }
  59
  60 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  61 {
  62         if (bo->destroy == &radeon_ttm_bo_destroy)
  63                 return true;
  64         return false;
  65 }
  66
  67 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  68 {
  69         u32 c = 0;
  70
  71         rbo->placement.fpfn = 0;
  72         rbo->placement.lpfn = rbo->rdev->mc.active_vram_size >> PAGE_SHIFT;
  73         rbo->placement.placement = rbo->placements;
  74         rbo->placement.busy_placement = rbo->placements;
  75         if (domain & RADEON_GEM_DOMAIN_VRAM)
  76                 rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
  77                                         TTM_PL_FLAG_VRAM;
  78         if (domain & RADEON_GEM_DOMAIN_GTT)
  79                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
  80         if (domain & RADEON_GEM_DOMAIN_CPU)
  81                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  82         if (!c)
  83                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  84         rbo->placement.num_placement = c;
  85         rbo->placement.num_busy_placement = c;
  86 }
  87
  88 int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
  89                         unsigned long size, bool kernel, u32 domain,
  90                         struct radeon_bo **bo_ptr)
  91 {
  92         struct radeon_bo *bo;
  93         enum ttm_bo_type type;
  94         int r;
  95
  96         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
  97                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
  98         }
  99         if (kernel) {
 100                 type = ttm_bo_type_kernel;
 101         } else {
 102                 type = ttm_bo_type_device;
 103         }
 104         *bo_ptr = NULL;
 105
 106 retry:
 107         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 108         if (bo == NULL)
 109                 return -ENOMEM;
 110         bo->rdev = rdev;
 111         bo->gobj = gobj;
 112         bo->surface_reg = -1;
 113         INIT_LIST_HEAD(&bo->list);
 114         radeon_ttm_placement_from_domain(bo, domain);
 115         /* Kernel allocation are uninterruptible */
 116         mutex_lock(&rdev->vram_mutex);
 117         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 118                         &bo->placement, 0, 0, !kernel, NULL, size,
 119                         &radeon_ttm_bo_destroy);
 120         mutex_unlock(&rdev->vram_mutex);
 121         if (unlikely(r != 0)) {
 122                 if (r != -ERESTARTSYS) {
 123                         if (domain == RADEON_GEM_DOMAIN_VRAM) {
 124                                 domain |= RADEON_GEM_DOMAIN_GTT;
 125                                 goto retry;
 126                         }
 127                         dev_err(rdev->dev,
 128                                 "object_init failed for (%lu, 0x%08X)\n",
 129                                 size, domain);
 130                 }
 131                 return r;
 132         }
 133         *bo_ptr = bo;
 134         if (gobj) {
 135                 mutex_lock(&bo->rdev->gem.mutex);
 136                 list_add_tail(&bo->list, &rdev->gem.objects);
 137                 mutex_unlock(&bo->rdev->gem.mutex);
 138         }
 139         return 0;
 140 }
 141
 142 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 143 {
 144         bool is_iomem;
 145         int r;
 146
 147         if (bo->kptr) {
 148                 if (ptr) {
 149                         *ptr = bo->kptr;
 150                 }
 151                 return 0;
 152         }
 153         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 154         if (r) {
 155                 return r;
 156         }
 157         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 158         if (ptr) {
 159                 *ptr = bo->kptr;
 160         }
 161         radeon_bo_check_tiling(bo, 0, 0);
 162         return 0;
 163 }
 164
 165 void radeon_bo_kunmap(struct radeon_bo *bo)
 166 {
 167         if (bo->kptr == NULL)
 168                 return;
 169         bo->kptr = NULL;
 170         radeon_bo_check_tiling(bo, 0, 0);
 171         ttm_bo_kunmap(&bo->kmap);
 172 }
 173
 174 void radeon_bo_unref(struct radeon_bo **bo)
 175 {
 176         struct ttm_buffer_object *tbo;
 177         struct radeon_device *rdev;
 178
 179         if ((*bo) == NULL)
 180                 return;
 181         rdev = (*bo)->rdev;
 182         tbo = &((*bo)->tbo);
 183         mutex_lock(&rdev->vram_mutex);
 184         ttm_bo_unref(&tbo);
 185         mutex_unlock(&rdev->vram_mutex);
 186         if (tbo == NULL)
 187                 *bo = NULL;
 188 }
 189
 190 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 191 {
 192         int r, i;
 193
 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         if (domain == RADEON_GEM_DOMAIN_VRAM) {
 202                 /* force to pin into visible video ram */
 203                 bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 204         }
 205         for (i = 0; i < bo->placement.num_placement; i++)
 206                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 207         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false, false);
 208         if (likely(r == 0)) {
 209                 bo->pin_count = 1;
 210                 if (gpu_addr != NULL)
 211                         *gpu_addr = radeon_bo_gpu_offset(bo);
 212         }
 213         if (unlikely(r != 0))
 214                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 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         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false, false);
 232         if (unlikely(r != 0))
 233                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 234         return r;
 235 }
 236
 237 int radeon_bo_evict_vram(struct radeon_device *rdev)
 238 {
 239         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 240         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 241                 if (rdev->mc.igp_sideport_enabled == false)
 242                         /* Useless to evict on IGP chips */
 243                         return 0;
 244         }
 245         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 246 }
 247
 248 void radeon_bo_force_delete(struct radeon_device *rdev)
 249 {
 250         struct radeon_bo *bo, *n;
 251         struct drm_gem_object *gobj;
 252
 253         if (list_empty(&rdev->gem.objects)) {
 254                 return;
 255         }
 256         dev_err(rdev->dev, "Userspace still has active objects !\n");
 257         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 258                 mutex_lock(&rdev->ddev->struct_mutex);
 259                 gobj = bo->gobj;
 260                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 261                         gobj, bo, (unsigned long)gobj->size,
 262                         *((unsigned long *)&gobj->refcount));
 263                 mutex_lock(&bo->rdev->gem.mutex);
 264                 list_del_init(&bo->list);
 265                 mutex_unlock(&bo->rdev->gem.mutex);
 266                 radeon_bo_unref(&bo);
 267                 gobj->driver_private = NULL;
 268                 drm_gem_object_unreference(gobj);
 269                 mutex_unlock(&rdev->ddev->struct_mutex);
 270         }
 271 }
 272
 273 int radeon_bo_init(struct radeon_device *rdev)
 274 {
 275         /* Add an MTRR for the VRAM */
 276         rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 277                         MTRR_TYPE_WRCOMB, 1);
 278         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 279                 rdev->mc.mc_vram_size >> 20,
 280                 (unsigned long long)rdev->mc.aper_size >> 20);
 281         DRM_INFO("RAM width %dbits %cDR\n",
 282                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 283         return radeon_ttm_init(rdev);
 284 }
 285
 286 void radeon_bo_fini(struct radeon_device *rdev)
 287 {
 288         radeon_ttm_fini(rdev);
 289 }
 290
 291 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 292                                 struct list_head *head)
 293 {
 294         if (lobj->wdomain) {
 295                 list_add(&lobj->list, head);
 296         } else {
 297                 list_add_tail(&lobj->list, head);
 298         }
 299 }
 300
 301 int radeon_bo_list_reserve(struct list_head *head)
 302 {
 303         struct radeon_bo_list *lobj;
 304         int r;
 305
 306         list_for_each_entry(lobj, head, list){
 307                 r = radeon_bo_reserve(lobj->bo, false);
 308                 if (unlikely(r != 0))
 309                         return r;
 310                 lobj->reserved = true;
 311         }
 312         return 0;
 313 }
 314
 315 void radeon_bo_list_unreserve(struct list_head *head)
 316 {
 317         struct radeon_bo_list *lobj;
 318
 319         list_for_each_entry(lobj, head, list) {
 320                 /* only unreserve object we successfully reserved */
 321                 if (lobj->reserved && radeon_bo_is_reserved(lobj->bo))
 322                         radeon_bo_unreserve(lobj->bo);
 323         }
 324 }
 325
 326 int radeon_bo_list_validate(struct list_head *head)
 327 {
 328         struct radeon_bo_list *lobj;
 329         struct radeon_bo *bo;
 330         u32 domain;
 331         int r;
 332
 333         list_for_each_entry(lobj, head, list) {
 334                 lobj->reserved = false;
 335         }
 336         r = radeon_bo_list_reserve(head);
 337         if (unlikely(r != 0)) {
 338                 return r;
 339         }
 340         list_for_each_entry(lobj, head, list) {
 341                 bo = lobj->bo;
 342                 if (!bo->pin_count) {
 343                         domain = lobj->wdomain ? lobj->wdomain : lobj->rdomain;
 344
 345                 retry:
 346                         radeon_ttm_placement_from_domain(bo, domain);
 347                         r = ttm_bo_validate(&bo->tbo, &bo->placement,
 348                                                 true, false, false);
 349                         if (unlikely(r)) {
 350                                 if (r != -ERESTARTSYS && domain == RADEON_GEM_DOMAIN_VRAM) {
 351                                         domain |= RADEON_GEM_DOMAIN_GTT;
 352                                         goto retry;
 353                                 }
 354                                 return r;
 355                         }
 356                 }
 357                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 358                 lobj->tiling_flags = bo->tiling_flags;
 359         }
 360         return 0;
 361 }
 362
 363 void radeon_bo_list_fence(struct list_head *head, void *fence)
 364 {
 365         struct radeon_bo_list *lobj;
 366         struct radeon_bo *bo;
 367         struct radeon_fence *old_fence = NULL;
 368
 369         list_for_each_entry(lobj, head, list) {
 370                 bo = lobj->bo;
 371                 spin_lock(&bo->tbo.lock);
 372                 old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
 373                 bo->tbo.sync_obj = radeon_fence_ref(fence);
 374                 bo->tbo.sync_obj_arg = NULL;
 375                 spin_unlock(&bo->tbo.lock);
 376                 if (old_fence) {
 377                         radeon_fence_unref(&old_fence);
 378                 }
 379         }
 380 }
 381
 382 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 383                              struct vm_area_struct *vma)
 384 {
 385         return ttm_fbdev_mmap(vma, &bo->tbo);
 386 }
 387
 388 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 389 {
 390         struct radeon_device *rdev = bo->rdev;
 391         struct radeon_surface_reg *reg;
 392         struct radeon_bo *old_object;
 393         int steal;
 394         int i;
 395
 396         BUG_ON(!atomic_read(&bo->tbo.reserved));
 397
 398         if (!bo->tiling_flags)
 399                 return 0;
 400
 401         if (bo->surface_reg >= 0) {
 402                 reg = &rdev->surface_regs[bo->surface_reg];
 403                 i = bo->surface_reg;
 404                 goto out;
 405         }
 406
 407         steal = -1;
 408         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 409
 410                 reg = &rdev->surface_regs[i];
 411                 if (!reg->bo)
 412                         break;
 413
 414                 old_object = reg->bo;
 415                 if (old_object->pin_count == 0)
 416                         steal = i;
 417         }
 418
 419         /* if we are all out */
 420         if (i == RADEON_GEM_MAX_SURFACES) {
 421                 if (steal == -1)
 422                         return -ENOMEM;
 423                 /* find someone with a surface reg and nuke their BO */
 424                 reg = &rdev->surface_regs[steal];
 425                 old_object = reg->bo;
 426                 /* blow away the mapping */
 427                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 428                 ttm_bo_unmap_virtual(&old_object->tbo);
 429                 old_object->surface_reg = -1;
 430                 i = steal;
 431         }
 432
 433         bo->surface_reg = i;
 434         reg->bo = bo;
 435
 436 out:
 437         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 438                                bo->tbo.mem.mm_node->start << PAGE_SHIFT,
 439                                bo->tbo.num_pages << PAGE_SHIFT);
 440         return 0;
 441 }
 442
 443 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 444 {
 445         struct radeon_device *rdev = bo->rdev;
 446         struct radeon_surface_reg *reg;
 447
 448         if (bo->surface_reg == -1)
 449                 return;
 450
 451         reg = &rdev->surface_regs[bo->surface_reg];
 452         radeon_clear_surface_reg(rdev, bo->surface_reg);
 453
 454         reg->bo = NULL;
 455         bo->surface_reg = -1;
 456 }
 457
 458 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 459                                 uint32_t tiling_flags, uint32_t pitch)
 460 {
 461         int r;
 462
 463         r = radeon_bo_reserve(bo, false);
 464         if (unlikely(r != 0))
 465                 return r;
 466         bo->tiling_flags = tiling_flags;
 467         bo->pitch = pitch;
 468         radeon_bo_unreserve(bo);
 469         return 0;
 470 }
 471
 472 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 473                                 uint32_t *tiling_flags,
 474                                 uint32_t *pitch)
 475 {
 476         BUG_ON(!atomic_read(&bo->tbo.reserved));
 477         if (tiling_flags)
 478                 *tiling_flags = bo->tiling_flags;
 479         if (pitch)
 480                 *pitch = bo->pitch;
 481 }
 482
 483 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 484                                 bool force_drop)
 485 {
 486         BUG_ON(!atomic_read(&bo->tbo.reserved));
 487
 488         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 489                 return 0;
 490
 491         if (force_drop) {
 492                 radeon_bo_clear_surface_reg(bo);
 493                 return 0;
 494         }
 495
 496         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 497                 if (!has_moved)
 498                         return 0;
 499
 500                 if (bo->surface_reg >= 0)
 501                         radeon_bo_clear_surface_reg(bo);
 502                 return 0;
 503         }
 504
 505         if ((bo->surface_reg >= 0) && !has_moved)
 506                 return 0;
 507
 508         return radeon_bo_get_surface_reg(bo);
 509 }
 510
 511 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 512                            struct ttm_mem_reg *mem)
 513 {
 514         struct radeon_bo *rbo;
 515         if (!radeon_ttm_bo_is_radeon_bo(bo))
 516                 return;
 517         rbo = container_of(bo, struct radeon_bo, tbo);
 518         radeon_bo_check_tiling(rbo, 0, 1);
 519 }
 520
 521 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 522 {
 523         struct radeon_device *rdev;
 524         struct radeon_bo *rbo;
 525         unsigned long offset, size;
 526         int r;
 527
 528         if (!radeon_ttm_bo_is_radeon_bo(bo))
 529                 return 0;
 530         rbo = container_of(bo, struct radeon_bo, tbo);
 531         radeon_bo_check_tiling(rbo, 0, 0);
 532         rdev = rbo->rdev;
 533         if (bo->mem.mem_type == TTM_PL_VRAM) {
 534                 size = bo->mem.num_pages << PAGE_SHIFT;
 535                 offset = bo->mem.mm_node->start << PAGE_SHIFT;
 536                 if ((offset + size) > rdev->mc.visible_vram_size) {
 537                         /* hurrah the memory is not visible ! */
 538                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 539                         rbo->placement.lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT;
 540                         r = ttm_bo_validate(bo, &rbo->placement, false, true, false);
 541                         if (unlikely(r != 0))
 542                                 return r;
 543                         offset = bo->mem.mm_node->start << PAGE_SHIFT;
 544                         /* this should not happen */
 545                         if ((offset + size) > rdev->mc.visible_vram_size)
 546                                 return -EINVAL;
 547                 }
 548         }
 549         return 0;
 550 }