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 = 0;
  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         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 106         if (bo == NULL)
 107                 return -ENOMEM;
 108         bo->rdev = rdev;
 109         bo->gobj = gobj;
 110         bo->surface_reg = -1;
 111         INIT_LIST_HEAD(&bo->list);
 112
 113         radeon_ttm_placement_from_domain(bo, domain);
 114         /* Kernel allocation are uninterruptible */
 115         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 116                         &bo->placement, 0, 0, !kernel, NULL, size,
 117                         &radeon_ttm_bo_destroy);
 118         if (unlikely(r != 0)) {
 119                 if (r != -ERESTARTSYS)
 120                         dev_err(rdev->dev,
 121                                 "object_init failed for (%lu, 0x%08X)\n",
 122                                 size, domain);
 123                 return r;
 124         }
 125         *bo_ptr = bo;
 126         if (gobj) {
 127                 mutex_lock(&bo->rdev->gem.mutex);
 128                 list_add_tail(&bo->list, &rdev->gem.objects);
 129                 mutex_unlock(&bo->rdev->gem.mutex);
 130         }
 131         return 0;
 132 }
 133
 134 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 135 {
 136         bool is_iomem;
 137         int r;
 138
 139         if (bo->kptr) {
 140                 if (ptr) {
 141                         *ptr = bo->kptr;
 142                 }
 143                 return 0;
 144         }
 145         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 146         if (r) {
 147                 return r;
 148         }
 149         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 150         if (ptr) {
 151                 *ptr = bo->kptr;
 152         }
 153         radeon_bo_check_tiling(bo, 0, 0);
 154         return 0;
 155 }
 156
 157 void radeon_bo_kunmap(struct radeon_bo *bo)
 158 {
 159         if (bo->kptr == NULL)
 160                 return;
 161         bo->kptr = NULL;
 162         radeon_bo_check_tiling(bo, 0, 0);
 163         ttm_bo_kunmap(&bo->kmap);
 164 }
 165
 166 void radeon_bo_unref(struct radeon_bo **bo)
 167 {
 168         struct ttm_buffer_object *tbo;
 169
 170         if ((*bo) == NULL)
 171                 return;
 172         tbo = &((*bo)->tbo);
 173         ttm_bo_unref(&tbo);
 174         if (tbo == NULL)
 175                 *bo = NULL;
 176 }
 177
 178 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 179 {
 180         int r, i;
 181
 182         if (bo->pin_count) {
 183                 bo->pin_count++;
 184                 if (gpu_addr)
 185                         *gpu_addr = radeon_bo_gpu_offset(bo);
 186                 return 0;
 187         }
 188         radeon_ttm_placement_from_domain(bo, domain);
 189         /* force to pin into visible video ram */
 190         bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 191         for (i = 0; i < bo->placement.num_placement; i++)
 192                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 193         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 194         if (likely(r == 0)) {
 195                 bo->pin_count = 1;
 196                 if (gpu_addr != NULL)
 197                         *gpu_addr = radeon_bo_gpu_offset(bo);
 198         }
 199         if (unlikely(r != 0))
 200                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 201         return r;
 202 }
 203
 204 int radeon_bo_unpin(struct radeon_bo *bo)
 205 {
 206         int r, i;
 207
 208         if (!bo->pin_count) {
 209                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 210                 return 0;
 211         }
 212         bo->pin_count--;
 213         if (bo->pin_count)
 214                 return 0;
 215         for (i = 0; i < bo->placement.num_placement; i++)
 216                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 217         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 218         if (unlikely(r != 0))
 219                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 220         return r;
 221 }
 222
 223 int radeon_bo_evict_vram(struct radeon_device *rdev)
 224 {
 225         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 226         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 227                 if (rdev->mc.igp_sideport_enabled == false)
 228                         /* Useless to evict on IGP chips */
 229                         return 0;
 230         }
 231         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 232 }
 233
 234 void radeon_bo_force_delete(struct radeon_device *rdev)
 235 {
 236         struct radeon_bo *bo, *n;
 237         struct drm_gem_object *gobj;
 238
 239         if (list_empty(&rdev->gem.objects)) {
 240                 return;
 241         }
 242         dev_err(rdev->dev, "Userspace still has active objects !\n");
 243         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 244                 mutex_lock(&rdev->ddev->struct_mutex);
 245                 gobj = bo->gobj;
 246                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 247                         gobj, bo, (unsigned long)gobj->size,
 248                         *((unsigned long *)&gobj->refcount));
 249                 mutex_lock(&bo->rdev->gem.mutex);
 250                 list_del_init(&bo->list);
 251                 mutex_unlock(&bo->rdev->gem.mutex);
 252                 radeon_bo_unref(&bo);
 253                 gobj->driver_private = NULL;
 254                 drm_gem_object_unreference(gobj);
 255                 mutex_unlock(&rdev->ddev->struct_mutex);
 256         }
 257 }
 258
 259 int radeon_bo_init(struct radeon_device *rdev)
 260 {
 261         /* Add an MTRR for the VRAM */
 262         rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 263                         MTRR_TYPE_WRCOMB, 1);
 264         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 265                 rdev->mc.mc_vram_size >> 20,
 266                 (unsigned long long)rdev->mc.aper_size >> 20);
 267         DRM_INFO("RAM width %dbits %cDR\n",
 268                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 269         return radeon_ttm_init(rdev);
 270 }
 271
 272 void radeon_bo_fini(struct radeon_device *rdev)
 273 {
 274         radeon_ttm_fini(rdev);
 275 }
 276
 277 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 278                                 struct list_head *head)
 279 {
 280         if (lobj->wdomain) {
 281                 list_add(&lobj->list, head);
 282         } else {
 283                 list_add_tail(&lobj->list, head);
 284         }
 285 }
 286
 287 int radeon_bo_list_reserve(struct list_head *head)
 288 {
 289         struct radeon_bo_list *lobj;
 290         int r;
 291
 292         list_for_each_entry(lobj, head, list){
 293                 r = radeon_bo_reserve(lobj->bo, false);
 294                 if (unlikely(r != 0))
 295                         return r;
 296         }
 297         return 0;
 298 }
 299
 300 void radeon_bo_list_unreserve(struct list_head *head)
 301 {
 302         struct radeon_bo_list *lobj;
 303
 304         list_for_each_entry(lobj, head, list) {
 305                 /* only unreserve object we successfully reserved */
 306                 if (radeon_bo_is_reserved(lobj->bo))
 307                         radeon_bo_unreserve(lobj->bo);
 308         }
 309 }
 310
 311 int radeon_bo_list_validate(struct list_head *head)
 312 {
 313         struct radeon_bo_list *lobj;
 314         struct radeon_bo *bo;
 315         int r;
 316
 317         r = radeon_bo_list_reserve(head);
 318         if (unlikely(r != 0)) {
 319                 return r;
 320         }
 321         list_for_each_entry(lobj, head, list) {
 322                 bo = lobj->bo;
 323                 if (!bo->pin_count) {
 324                         if (lobj->wdomain) {
 325                                 radeon_ttm_placement_from_domain(bo,
 326                                                                 lobj->wdomain);
 327                         } else {
 328                                 radeon_ttm_placement_from_domain(bo,
 329                                                                 lobj->rdomain);
 330                         }
 331                         r = ttm_bo_validate(&bo->tbo, &bo->placement,
 332                                                 true, false);
 333                         if (unlikely(r))
 334                                 return r;
 335                 }
 336                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 337                 lobj->tiling_flags = bo->tiling_flags;
 338         }
 339         return 0;
 340 }
 341
 342 void radeon_bo_list_fence(struct list_head *head, void *fence)
 343 {
 344         struct radeon_bo_list *lobj;
 345         struct radeon_bo *bo;
 346         struct radeon_fence *old_fence = NULL;
 347
 348         list_for_each_entry(lobj, head, list) {
 349                 bo = lobj->bo;
 350                 spin_lock(&bo->tbo.lock);
 351                 old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
 352                 bo->tbo.sync_obj = radeon_fence_ref(fence);
 353                 bo->tbo.sync_obj_arg = NULL;
 354                 spin_unlock(&bo->tbo.lock);
 355                 if (old_fence) {
 356                         radeon_fence_unref(&old_fence);
 357                 }
 358         }
 359 }
 360
 361 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 362                              struct vm_area_struct *vma)
 363 {
 364         return ttm_fbdev_mmap(vma, &bo->tbo);
 365 }
 366
 367 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 368 {
 369         struct radeon_device *rdev = bo->rdev;
 370         struct radeon_surface_reg *reg;
 371         struct radeon_bo *old_object;
 372         int steal;
 373         int i;
 374
 375         BUG_ON(!atomic_read(&bo->tbo.reserved));
 376
 377         if (!bo->tiling_flags)
 378                 return 0;
 379
 380         if (bo->surface_reg >= 0) {
 381                 reg = &rdev->surface_regs[bo->surface_reg];
 382                 i = bo->surface_reg;
 383                 goto out;
 384         }
 385
 386         steal = -1;
 387         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 388
 389                 reg = &rdev->surface_regs[i];
 390                 if (!reg->bo)
 391                         break;
 392
 393                 old_object = reg->bo;
 394                 if (old_object->pin_count == 0)
 395                         steal = i;
 396         }
 397
 398         /* if we are all out */
 399         if (i == RADEON_GEM_MAX_SURFACES) {
 400                 if (steal == -1)
 401                         return -ENOMEM;
 402                 /* find someone with a surface reg and nuke their BO */
 403                 reg = &rdev->surface_regs[steal];
 404                 old_object = reg->bo;
 405                 /* blow away the mapping */
 406                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 407                 ttm_bo_unmap_virtual(&old_object->tbo);
 408                 old_object->surface_reg = -1;
 409                 i = steal;
 410         }
 411
 412         bo->surface_reg = i;
 413         reg->bo = bo;
 414
 415 out:
 416         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 417                                bo->tbo.mem.mm_node->start << PAGE_SHIFT,
 418                                bo->tbo.num_pages << PAGE_SHIFT);
 419         return 0;
 420 }
 421
 422 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 423 {
 424         struct radeon_device *rdev = bo->rdev;
 425         struct radeon_surface_reg *reg;
 426
 427         if (bo->surface_reg == -1)
 428                 return;
 429
 430         reg = &rdev->surface_regs[bo->surface_reg];
 431         radeon_clear_surface_reg(rdev, bo->surface_reg);
 432
 433         reg->bo = NULL;
 434         bo->surface_reg = -1;
 435 }
 436
 437 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 438                                 uint32_t tiling_flags, uint32_t pitch)
 439 {
 440         int r;
 441
 442         r = radeon_bo_reserve(bo, false);
 443         if (unlikely(r != 0))
 444                 return r;
 445         bo->tiling_flags = tiling_flags;
 446         bo->pitch = pitch;
 447         radeon_bo_unreserve(bo);
 448         return 0;
 449 }
 450
 451 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 452                                 uint32_t *tiling_flags,
 453                                 uint32_t *pitch)
 454 {
 455         BUG_ON(!atomic_read(&bo->tbo.reserved));
 456         if (tiling_flags)
 457                 *tiling_flags = bo->tiling_flags;
 458         if (pitch)
 459                 *pitch = bo->pitch;
 460 }
 461
 462 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 463                                 bool force_drop)
 464 {
 465         BUG_ON(!atomic_read(&bo->tbo.reserved));
 466
 467         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 468                 return 0;
 469
 470         if (force_drop) {
 471                 radeon_bo_clear_surface_reg(bo);
 472                 return 0;
 473         }
 474
 475         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 476                 if (!has_moved)
 477                         return 0;
 478
 479                 if (bo->surface_reg >= 0)
 480                         radeon_bo_clear_surface_reg(bo);
 481                 return 0;
 482         }
 483
 484         if ((bo->surface_reg >= 0) && !has_moved)
 485                 return 0;
 486
 487         return radeon_bo_get_surface_reg(bo);
 488 }
 489
 490 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 491                            struct ttm_mem_reg *mem)
 492 {
 493         struct radeon_bo *rbo;
 494         if (!radeon_ttm_bo_is_radeon_bo(bo))
 495                 return;
 496         rbo = container_of(bo, struct radeon_bo, tbo);
 497         radeon_bo_check_tiling(rbo, 0, 1);
 498 }
 499
 500 void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 501 {
 502         struct radeon_bo *rbo;
 503         if (!radeon_ttm_bo_is_radeon_bo(bo))
 504                 return;
 505         rbo = container_of(bo, struct radeon_bo, tbo);
 506         radeon_bo_check_tiling(rbo, 0, 0);
 507 }