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 int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
  79                         unsigned long size, bool kernel, u32 domain,
  80                         struct radeon_bo **bo_ptr)
  81 {
  82         struct radeon_bo *bo;
  83         enum ttm_bo_type type;
  84         u32 flags;
  85         int r;
  86
  87         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
  88                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
  89         }
  90         if (kernel) {
  91                 type = ttm_bo_type_kernel;
  92         } else {
  93                 type = ttm_bo_type_device;
  94         }
  95         *bo_ptr = NULL;
  96         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
  97         if (bo == NULL)
  98                 return -ENOMEM;
  99         bo->rdev = rdev;
 100         bo->gobj = gobj;
 101         bo->surface_reg = -1;
 102         INIT_LIST_HEAD(&bo->list);
 103
 104         flags = radeon_ttm_flags_from_domain(domain);
 105 retry:
 106         r = ttm_buffer_object_init(&rdev->mman.bdev, &bo->tbo, size, type,
 107                                         flags, 0, 0, true, NULL, size,
 108                                         &radeon_ttm_bo_destroy);
 109         if (unlikely(r != 0)) {
 110                 if (r == -ERESTART)
 111                         goto retry;
 112                 /* ttm call radeon_ttm_object_object_destroy if error happen */
 113                 dev_err(rdev->dev, "object_init failed for (%ld, 0x%08X)\n",
 114                         size, flags);
 115                 return r;
 116         }
 117         *bo_ptr = bo;
 118         if (gobj) {
 119                 mutex_lock(&bo->rdev->gem.mutex);
 120                 list_add_tail(&bo->list, &rdev->gem.objects);
 121                 mutex_unlock(&bo->rdev->gem.mutex);
 122         }
 123         return 0;
 124 }
 125
 126 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 127 {
 128         bool is_iomem;
 129         int r;
 130
 131         if (bo->kptr) {
 132                 if (ptr) {
 133                         *ptr = bo->kptr;
 134                 }
 135                 return 0;
 136         }
 137         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 138         if (r) {
 139                 return r;
 140         }
 141         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 142         if (ptr) {
 143                 *ptr = bo->kptr;
 144         }
 145         radeon_bo_check_tiling(bo, 0, 0);
 146         return 0;
 147 }
 148
 149 void radeon_bo_kunmap(struct radeon_bo *bo)
 150 {
 151         if (bo->kptr == NULL)
 152                 return;
 153         bo->kptr = NULL;
 154         radeon_bo_check_tiling(bo, 0, 0);
 155         ttm_bo_kunmap(&bo->kmap);
 156 }
 157
 158 void radeon_bo_unref(struct radeon_bo **bo)
 159 {
 160         struct ttm_buffer_object *tbo;
 161
 162         if ((*bo) == NULL)
 163                 return;
 164         tbo = &((*bo)->tbo);
 165         ttm_bo_unref(&tbo);
 166         if (tbo == NULL)
 167                 *bo = NULL;
 168 }
 169
 170 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 171 {
 172         u32 flags;
 173         u32 tmp;
 174         int r;
 175
 176         flags = radeon_ttm_flags_from_domain(domain);
 177         if (bo->pin_count) {
 178                 bo->pin_count++;
 179                 if (gpu_addr)
 180                         *gpu_addr = radeon_bo_gpu_offset(bo);
 181                 return 0;
 182         }
 183         tmp = bo->tbo.mem.placement;
 184         ttm_flag_masked(&tmp, flags, TTM_PL_MASK_MEM);
 185         bo->tbo.proposed_placement = tmp | TTM_PL_FLAG_NO_EVICT |
 186                                         TTM_PL_MASK_CACHING;
 187 retry:
 188         r = ttm_buffer_object_validate(&bo->tbo, bo->tbo.proposed_placement,
 189                                         true, false);
 190         if (likely(r == 0)) {
 191                 bo->pin_count = 1;
 192                 if (gpu_addr != NULL)
 193                         *gpu_addr = radeon_bo_gpu_offset(bo);
 194         }
 195         if (unlikely(r != 0)) {
 196                 if (r == -ERESTART)
 197                         goto retry;
 198                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 199         }
 200         return r;
 201 }
 202
 203 int radeon_bo_unpin(struct radeon_bo *bo)
 204 {
 205         int r;
 206
 207         if (!bo->pin_count) {
 208                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 209                 return 0;
 210         }
 211         bo->pin_count--;
 212         if (bo->pin_count)
 213                 return 0;
 214         bo->tbo.proposed_placement = bo->tbo.mem.placement &
 215                                         ~TTM_PL_FLAG_NO_EVICT;
 216 retry:
 217         r = ttm_buffer_object_validate(&bo->tbo, bo->tbo.proposed_placement,
 218                                         true, false);
 219         if (unlikely(r != 0)) {
 220                 if (r == -ERESTART)
 221                         goto retry;
 222                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 223                 return r;
 224         }
 225         return 0;
 226 }
 227
 228 int radeon_bo_evict_vram(struct radeon_device *rdev)
 229 {
 230         if (rdev->flags & RADEON_IS_IGP) {
 231                 /* Useless to evict on IGP chips */
 232                 return 0;
 233         }
 234         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 235 }
 236
 237 void radeon_bo_force_delete(struct radeon_device *rdev)
 238 {
 239         struct radeon_bo *bo, *n;
 240         struct drm_gem_object *gobj;
 241
 242         if (list_empty(&rdev->gem.objects)) {
 243                 return;
 244         }
 245         dev_err(rdev->dev, "Userspace still has active objects !\n");
 246         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 247                 mutex_lock(&rdev->ddev->struct_mutex);
 248                 gobj = bo->gobj;
 249                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 250                         gobj, bo, (unsigned long)gobj->size,
 251                         *((unsigned long *)&gobj->refcount));
 252                 mutex_lock(&bo->rdev->gem.mutex);
 253                 list_del_init(&bo->list);
 254                 mutex_unlock(&bo->rdev->gem.mutex);
 255                 radeon_bo_unref(&bo);
 256                 gobj->driver_private = NULL;
 257                 drm_gem_object_unreference(gobj);
 258                 mutex_unlock(&rdev->ddev->struct_mutex);
 259         }
 260 }
 261
 262 int radeon_bo_init(struct radeon_device *rdev)
 263 {
 264         /* Add an MTRR for the VRAM */
 265         rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 266                         MTRR_TYPE_WRCOMB, 1);
 267         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 268                 rdev->mc.mc_vram_size >> 20,
 269                 (unsigned long long)rdev->mc.aper_size >> 20);
 270         DRM_INFO("RAM width %dbits %cDR\n",
 271                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 272         return radeon_ttm_init(rdev);
 273 }
 274
 275 void radeon_bo_fini(struct radeon_device *rdev)
 276 {
 277         radeon_ttm_fini(rdev);
 278 }
 279
 280 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 281                                 struct list_head *head)
 282 {
 283         if (lobj->wdomain) {
 284                 list_add(&lobj->list, head);
 285         } else {
 286                 list_add_tail(&lobj->list, head);
 287         }
 288 }
 289
 290 int radeon_bo_list_reserve(struct list_head *head)
 291 {
 292         struct radeon_bo_list *lobj;
 293         int r;
 294
 295         list_for_each_entry(lobj, head, list){
 296                 r = radeon_bo_reserve(lobj->bo, false);
 297                 if (unlikely(r != 0))
 298                         return r;
 299         }
 300         return 0;
 301 }
 302
 303 void radeon_bo_list_unreserve(struct list_head *head)
 304 {
 305         struct radeon_bo_list *lobj;
 306
 307         list_for_each_entry(lobj, head, list) {
 308                 /* only unreserve object we successfully reserved */
 309                 if (radeon_bo_is_reserved(lobj->bo))
 310                         radeon_bo_unreserve(lobj->bo);
 311         }
 312 }
 313
 314 int radeon_bo_list_validate(struct list_head *head, void *fence)
 315 {
 316         struct radeon_bo_list *lobj;
 317         struct radeon_bo *bo;
 318         struct radeon_fence *old_fence = NULL;
 319         int r;
 320
 321         r = radeon_bo_list_reserve(head);
 322         if (unlikely(r != 0)) {
 323                 return r;
 324         }
 325         list_for_each_entry(lobj, head, list) {
 326                 bo = lobj->bo;
 327                 if (!bo->pin_count) {
 328                         if (lobj->wdomain) {
 329                                 bo->tbo.proposed_placement =
 330                                         radeon_ttm_flags_from_domain(lobj->wdomain);
 331                         } else {
 332                                 bo->tbo.proposed_placement =
 333                                         radeon_ttm_flags_from_domain(lobj->rdomain);
 334                         }
 335 retry:
 336                         r = ttm_buffer_object_validate(&bo->tbo,
 337                                                 bo->tbo.proposed_placement,
 338                                                 true, false);
 339                         if (unlikely(r)) {
 340                                 if (r == -ERESTART)
 341                                         goto retry;
 342                                 return r;
 343                         }
 344                 }
 345                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 346                 lobj->tiling_flags = bo->tiling_flags;
 347                 if (fence) {
 348                         old_fence = (struct radeon_fence *)bo->tbo.sync_obj;
 349                         bo->tbo.sync_obj = radeon_fence_ref(fence);
 350                         bo->tbo.sync_obj_arg = NULL;
 351                 }
 352                 if (old_fence) {
 353                         radeon_fence_unref(&old_fence);
 354                 }
 355         }
 356         return 0;
 357 }
 358
 359 void radeon_bo_list_unvalidate(struct list_head *head, void *fence)
 360 {
 361         struct radeon_bo_list *lobj;
 362         struct radeon_fence *old_fence;
 363
 364         if (fence)
 365                 list_for_each_entry(lobj, head, list) {
 366                         old_fence = to_radeon_fence(lobj->bo->tbo.sync_obj);
 367                         if (old_fence == fence) {
 368                                 lobj->bo->tbo.sync_obj = NULL;
 369                                 radeon_fence_unref(&old_fence);
 370                         }
 371                 }
 372         radeon_bo_list_unreserve(head);
 373 }
 374
 375 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 376                              struct vm_area_struct *vma)
 377 {
 378         return ttm_fbdev_mmap(vma, &bo->tbo);
 379 }
 380
 381 static int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 382 {
 383         struct radeon_device *rdev = bo->rdev;
 384         struct radeon_surface_reg *reg;
 385         struct radeon_bo *old_object;
 386         int steal;
 387         int i;
 388
 389         BUG_ON(!atomic_read(&bo->tbo.reserved));
 390
 391         if (!bo->tiling_flags)
 392                 return 0;
 393
 394         if (bo->surface_reg >= 0) {
 395                 reg = &rdev->surface_regs[bo->surface_reg];
 396                 i = bo->surface_reg;
 397                 goto out;
 398         }
 399
 400         steal = -1;
 401         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 402
 403                 reg = &rdev->surface_regs[i];
 404                 if (!reg->bo)
 405                         break;
 406
 407                 old_object = reg->bo;
 408                 if (old_object->pin_count == 0)
 409                         steal = i;
 410         }
 411
 412         /* if we are all out */
 413         if (i == RADEON_GEM_MAX_SURFACES) {
 414                 if (steal == -1)
 415                         return -ENOMEM;
 416                 /* find someone with a surface reg and nuke their BO */
 417                 reg = &rdev->surface_regs[steal];
 418                 old_object = reg->bo;
 419                 /* blow away the mapping */
 420                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 421                 ttm_bo_unmap_virtual(&old_object->tbo);
 422                 old_object->surface_reg = -1;
 423                 i = steal;
 424         }
 425
 426         bo->surface_reg = i;
 427         reg->bo = bo;
 428
 429 out:
 430         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 431                                bo->tbo.mem.mm_node->start << PAGE_SHIFT,
 432                                bo->tbo.num_pages << PAGE_SHIFT);
 433         return 0;
 434 }
 435
 436 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 437 {
 438         struct radeon_device *rdev = bo->rdev;
 439         struct radeon_surface_reg *reg;
 440
 441         if (bo->surface_reg == -1)
 442                 return;
 443
 444         reg = &rdev->surface_regs[bo->surface_reg];
 445         radeon_clear_surface_reg(rdev, bo->surface_reg);
 446
 447         reg->bo = NULL;
 448         bo->surface_reg = -1;
 449 }
 450
 451 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 452                                 uint32_t tiling_flags, uint32_t pitch)
 453 {
 454         int r;
 455
 456         r = radeon_bo_reserve(bo, false);
 457         if (unlikely(r != 0))
 458                 return r;
 459         bo->tiling_flags = tiling_flags;
 460         bo->pitch = pitch;
 461         radeon_bo_unreserve(bo);
 462         return 0;
 463 }
 464
 465 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 466                                 uint32_t *tiling_flags,
 467                                 uint32_t *pitch)
 468 {
 469         BUG_ON(!atomic_read(&bo->tbo.reserved));
 470         if (tiling_flags)
 471                 *tiling_flags = bo->tiling_flags;
 472         if (pitch)
 473                 *pitch = bo->pitch;
 474 }
 475
 476 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 477                                 bool force_drop)
 478 {
 479         BUG_ON(!atomic_read(&bo->tbo.reserved));
 480
 481         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 482                 return 0;
 483
 484         if (force_drop) {
 485                 radeon_bo_clear_surface_reg(bo);
 486                 return 0;
 487         }
 488
 489         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 490                 if (!has_moved)
 491                         return 0;
 492
 493                 if (bo->surface_reg >= 0)
 494                         radeon_bo_clear_surface_reg(bo);
 495                 return 0;
 496         }
 497
 498         if ((bo->surface_reg >= 0) && !has_moved)
 499                 return 0;
 500
 501         return radeon_bo_get_surface_reg(bo);
 502 }
 503
 504 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 505                                 struct ttm_mem_reg *mem)
 506 {
 507         struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
 508         radeon_bo_check_tiling(rbo, 0, 1);
 509 }
 510
 511 void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 512 {
 513         struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
 514         radeon_bo_check_tiling(rbo, 0, 0);
 515 }