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 struct radeon_object {
  38         struct ttm_buffer_object        tobj;
  39         struct list_head                list;
  40         struct radeon_device            *rdev;
  41         struct drm_gem_object           *gobj;
  42         struct ttm_bo_kmap_obj          kmap;
  43         unsigned                        pin_count;
  44         uint64_t                        gpu_addr;
  45         void                            *kptr;
  46         bool                            is_iomem;
  47         uint32_t                        tiling_flags;
  48         uint32_t                        pitch;
  49         int                             surface_reg;
  50 };
  51
  52 int radeon_ttm_init(struct radeon_device *rdev);
  53 void radeon_ttm_fini(struct radeon_device *rdev);
  54
  55 /*
  56  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  57  * function are calling it.
  58  */
  59
  60 static int radeon_object_reserve(struct radeon_object *robj, bool interruptible)
  61 {
  62         return ttm_bo_reserve(&robj->tobj, interruptible, false, false, 0);
  63 }
  64
  65 static void radeon_object_unreserve(struct radeon_object *robj)
  66 {
  67         ttm_bo_unreserve(&robj->tobj);
  68 }
  69
  70 static void radeon_ttm_object_object_destroy(struct ttm_buffer_object *tobj)
  71 {
  72         struct radeon_object *robj;
  73
  74         robj = container_of(tobj, struct radeon_object, tobj);
  75         list_del_init(&robj->list);
  76         radeon_object_clear_surface_reg(robj);
  77         kfree(robj);
  78 }
  79
  80 static inline void radeon_object_gpu_addr(struct radeon_object *robj)
  81 {
  82         /* Default gpu address */
  83         robj->gpu_addr = 0xFFFFFFFFFFFFFFFFULL;
  84         if (robj->tobj.mem.mm_node == NULL) {
  85                 return;
  86         }
  87         robj->gpu_addr = ((u64)robj->tobj.mem.mm_node->start) << PAGE_SHIFT;
  88         switch (robj->tobj.mem.mem_type) {
  89         case TTM_PL_VRAM:
  90                 robj->gpu_addr += (u64)robj->rdev->mc.vram_location;
  91                 break;
  92         case TTM_PL_TT:
  93                 robj->gpu_addr += (u64)robj->rdev->mc.gtt_location;
  94                 break;
  95         default:
  96                 DRM_ERROR("Unknown placement %d\n", robj->tobj.mem.mem_type);
  97                 robj->gpu_addr = 0xFFFFFFFFFFFFFFFFULL;
  98                 return;
  99         }
 100 }
 101
 102 static inline uint32_t radeon_object_flags_from_domain(uint32_t domain)
 103 {
 104         uint32_t flags = 0;
 105         if (domain & RADEON_GEM_DOMAIN_VRAM) {
 106                 flags |= TTM_PL_FLAG_VRAM | TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED;
 107         }
 108         if (domain & RADEON_GEM_DOMAIN_GTT) {
 109                 flags |= TTM_PL_FLAG_TT | TTM_PL_MASK_CACHING;
 110         }
 111         if (domain & RADEON_GEM_DOMAIN_CPU) {
 112                 flags |= TTM_PL_FLAG_SYSTEM | TTM_PL_MASK_CACHING;
 113         }
 114         if (!flags) {
 115                 flags |= TTM_PL_FLAG_SYSTEM | TTM_PL_MASK_CACHING;
 116         }
 117         return flags;
 118 }
 119
 120 int radeon_object_create(struct radeon_device *rdev,
 121                          struct drm_gem_object *gobj,
 122                          unsigned long size,
 123                          bool kernel,
 124                          uint32_t domain,
 125                          bool interruptible,
 126                          struct radeon_object **robj_ptr)
 127 {
 128         struct radeon_object *robj;
 129         enum ttm_bo_type type;
 130         uint32_t flags;
 131         int r;
 132
 133         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 134                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 135         }
 136         if (kernel) {
 137                 type = ttm_bo_type_kernel;
 138         } else {
 139                 type = ttm_bo_type_device;
 140         }
 141         *robj_ptr = NULL;
 142         robj = kzalloc(sizeof(struct radeon_object), GFP_KERNEL);
 143         if (robj == NULL) {
 144                 return -ENOMEM;
 145         }
 146         robj->rdev = rdev;
 147         robj->gobj = gobj;
 148         robj->surface_reg = -1;
 149         INIT_LIST_HEAD(&robj->list);
 150
 151         flags = radeon_object_flags_from_domain(domain);
 152         r = ttm_buffer_object_init(&rdev->mman.bdev, &robj->tobj, size, type, flags,
 153                                    0, 0, false, NULL, size,
 154                                    &radeon_ttm_object_object_destroy);
 155         if (unlikely(r != 0)) {
 156                 /* ttm call radeon_ttm_object_object_destroy if error happen */
 157                 DRM_ERROR("Failed to allocate TTM object (%ld, 0x%08X, %u)\n",
 158                           size, flags, 0);
 159                 return r;
 160         }
 161         *robj_ptr = robj;
 162         if (gobj) {
 163                 list_add_tail(&robj->list, &rdev->gem.objects);
 164         }
 165         return 0;
 166 }
 167
 168 int radeon_object_kmap(struct radeon_object *robj, void **ptr)
 169 {
 170         int r;
 171
 172         spin_lock(&robj->tobj.lock);
 173         if (robj->kptr) {
 174                 if (ptr) {
 175                         *ptr = robj->kptr;
 176                 }
 177                 spin_unlock(&robj->tobj.lock);
 178                 return 0;
 179         }
 180         spin_unlock(&robj->tobj.lock);
 181         r = ttm_bo_kmap(&robj->tobj, 0, robj->tobj.num_pages, &robj->kmap);
 182         if (r) {
 183                 return r;
 184         }
 185         spin_lock(&robj->tobj.lock);
 186         robj->kptr = ttm_kmap_obj_virtual(&robj->kmap, &robj->is_iomem);
 187         spin_unlock(&robj->tobj.lock);
 188         if (ptr) {
 189                 *ptr = robj->kptr;
 190         }
 191         radeon_object_check_tiling(robj, 0, 0);
 192         return 0;
 193 }
 194
 195 void radeon_object_kunmap(struct radeon_object *robj)
 196 {
 197         spin_lock(&robj->tobj.lock);
 198         if (robj->kptr == NULL) {
 199                 spin_unlock(&robj->tobj.lock);
 200                 return;
 201         }
 202         robj->kptr = NULL;
 203         spin_unlock(&robj->tobj.lock);
 204         radeon_object_check_tiling(robj, 0, 0);
 205         ttm_bo_kunmap(&robj->kmap);
 206 }
 207
 208 void radeon_object_unref(struct radeon_object **robj)
 209 {
 210         struct ttm_buffer_object *tobj;
 211
 212         if ((*robj) == NULL) {
 213                 return;
 214         }
 215         tobj = &((*robj)->tobj);
 216         ttm_bo_unref(&tobj);
 217         if (tobj == NULL) {
 218                 *robj = NULL;
 219         }
 220 }
 221
 222 int radeon_object_mmap(struct radeon_object *robj, uint64_t *offset)
 223 {
 224         *offset = robj->tobj.addr_space_offset;
 225         return 0;
 226 }
 227
 228 int radeon_object_pin(struct radeon_object *robj, uint32_t domain,
 229                       uint64_t *gpu_addr)
 230 {
 231         uint32_t flags;
 232         uint32_t tmp;
 233         int r;
 234
 235         flags = radeon_object_flags_from_domain(domain);
 236         spin_lock(&robj->tobj.lock);
 237         if (robj->pin_count) {
 238                 robj->pin_count++;
 239                 if (gpu_addr != NULL) {
 240                         *gpu_addr = robj->gpu_addr;
 241                 }
 242                 spin_unlock(&robj->tobj.lock);
 243                 return 0;
 244         }
 245         spin_unlock(&robj->tobj.lock);
 246         r = radeon_object_reserve(robj, false);
 247         if (unlikely(r != 0)) {
 248                 DRM_ERROR("radeon: failed to reserve object for pinning it.\n");
 249                 return r;
 250         }
 251         tmp = robj->tobj.mem.placement;
 252         ttm_flag_masked(&tmp, flags, TTM_PL_MASK_MEM);
 253         robj->tobj.proposed_placement = tmp | TTM_PL_FLAG_NO_EVICT | TTM_PL_MASK_CACHING;
 254         r = ttm_buffer_object_validate(&robj->tobj,
 255                                        robj->tobj.proposed_placement,
 256                                        false, false);
 257         radeon_object_gpu_addr(robj);
 258         if (gpu_addr != NULL) {
 259                 *gpu_addr = robj->gpu_addr;
 260         }
 261         robj->pin_count = 1;
 262         if (unlikely(r != 0)) {
 263                 DRM_ERROR("radeon: failed to pin object.\n");
 264         }
 265         radeon_object_unreserve(robj);
 266         return r;
 267 }
 268
 269 void radeon_object_unpin(struct radeon_object *robj)
 270 {
 271         uint32_t flags;
 272         int r;
 273
 274         spin_lock(&robj->tobj.lock);
 275         if (!robj->pin_count) {
 276                 spin_unlock(&robj->tobj.lock);
 277                 printk(KERN_WARNING "Unpin not necessary for %p !\n", robj);
 278                 return;
 279         }
 280         robj->pin_count--;
 281         if (robj->pin_count) {
 282                 spin_unlock(&robj->tobj.lock);
 283                 return;
 284         }
 285         spin_unlock(&robj->tobj.lock);
 286         r = radeon_object_reserve(robj, false);
 287         if (unlikely(r != 0)) {
 288                 DRM_ERROR("radeon: failed to reserve object for unpinning it.\n");
 289                 return;
 290         }
 291         flags = robj->tobj.mem.placement;
 292         robj->tobj.proposed_placement = flags & ~TTM_PL_FLAG_NO_EVICT;
 293         r = ttm_buffer_object_validate(&robj->tobj,
 294                                        robj->tobj.proposed_placement,
 295                                        false, false);
 296         if (unlikely(r != 0)) {
 297                 DRM_ERROR("radeon: failed to unpin buffer.\n");
 298         }
 299         radeon_object_unreserve(robj);
 300 }
 301
 302 int radeon_object_wait(struct radeon_object *robj)
 303 {
 304         int r = 0;
 305
 306         /* FIXME: should use block reservation instead */
 307         r = radeon_object_reserve(robj, true);
 308         if (unlikely(r != 0)) {
 309                 DRM_ERROR("radeon: failed to reserve object for waiting.\n");
 310                 return r;
 311         }
 312         spin_lock(&robj->tobj.lock);
 313         if (robj->tobj.sync_obj) {
 314                 r = ttm_bo_wait(&robj->tobj, true, true, false);
 315         }
 316         spin_unlock(&robj->tobj.lock);
 317         radeon_object_unreserve(robj);
 318         return r;
 319 }
 320
 321 int radeon_object_busy_domain(struct radeon_object *robj, uint32_t *cur_placement)
 322 {
 323         int r = 0;
 324
 325         r = radeon_object_reserve(robj, true);
 326         if (unlikely(r != 0)) {
 327                 DRM_ERROR("radeon: failed to reserve object for waiting.\n");
 328                 return r;
 329         }
 330         spin_lock(&robj->tobj.lock);
 331         *cur_placement = robj->tobj.mem.mem_type;
 332         if (robj->tobj.sync_obj) {
 333                 r = ttm_bo_wait(&robj->tobj, true, true, true);
 334         }
 335         spin_unlock(&robj->tobj.lock);
 336         radeon_object_unreserve(robj);
 337         return r;
 338 }
 339
 340 int radeon_object_evict_vram(struct radeon_device *rdev)
 341 {
 342         if (rdev->flags & RADEON_IS_IGP) {
 343                 /* Useless to evict on IGP chips */
 344                 return 0;
 345         }
 346         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 347 }
 348
 349 void radeon_object_force_delete(struct radeon_device *rdev)
 350 {
 351         struct radeon_object *robj, *n;
 352         struct drm_gem_object *gobj;
 353
 354         if (list_empty(&rdev->gem.objects)) {
 355                 return;
 356         }
 357         DRM_ERROR("Userspace still has active objects !\n");
 358         list_for_each_entry_safe(robj, n, &rdev->gem.objects, list) {
 359                 mutex_lock(&rdev->ddev->struct_mutex);
 360                 gobj = robj->gobj;
 361                 DRM_ERROR("Force free for (%p,%p,%lu,%lu)\n",
 362                           gobj, robj, (unsigned long)gobj->size,
 363                           *((unsigned long *)&gobj->refcount));
 364                 list_del_init(&robj->list);
 365                 radeon_object_unref(&robj);
 366                 gobj->driver_private = NULL;
 367                 drm_gem_object_unreference(gobj);
 368                 mutex_unlock(&rdev->ddev->struct_mutex);
 369         }
 370 }
 371
 372 int radeon_object_init(struct radeon_device *rdev)
 373 {
 374         /* Add an MTRR for the VRAM */
 375         rdev->mc.vram_mtrr = mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size,
 376                         MTRR_TYPE_WRCOMB, 1);
 377         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 378                 rdev->mc.mc_vram_size >> 20,
 379                 (unsigned long long)rdev->mc.aper_size >> 20);
 380         DRM_INFO("RAM width %dbits %cDR\n",
 381                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 382         return radeon_ttm_init(rdev);
 383 }
 384
 385 void radeon_object_fini(struct radeon_device *rdev)
 386 {
 387         radeon_ttm_fini(rdev);
 388 }
 389
 390 void radeon_object_list_add_object(struct radeon_object_list *lobj,
 391                                    struct list_head *head)
 392 {
 393         if (lobj->wdomain) {
 394                 list_add(&lobj->list, head);
 395         } else {
 396                 list_add_tail(&lobj->list, head);
 397         }
 398 }
 399
 400 int radeon_object_list_reserve(struct list_head *head)
 401 {
 402         struct radeon_object_list *lobj;
 403         int r;
 404
 405         list_for_each_entry(lobj, head, list){
 406                 if (!lobj->robj->pin_count) {
 407                         r = radeon_object_reserve(lobj->robj, true);
 408                         if (unlikely(r != 0)) {
 409                                 DRM_ERROR("radeon: failed to reserve object.\n");
 410                                 return r;
 411                         }
 412                 } else {
 413                 }
 414         }
 415         return 0;
 416 }
 417
 418 void radeon_object_list_unreserve(struct list_head *head)
 419 {
 420         struct radeon_object_list *lobj;
 421
 422         list_for_each_entry(lobj, head, list) {
 423                 if (!lobj->robj->pin_count) {
 424                         radeon_object_unreserve(lobj->robj);
 425                 }
 426         }
 427 }
 428
 429 int radeon_object_list_validate(struct list_head *head, void *fence)
 430 {
 431         struct radeon_object_list *lobj;
 432         struct radeon_object *robj;
 433         struct radeon_fence *old_fence = NULL;
 434         int r;
 435
 436         r = radeon_object_list_reserve(head);
 437         if (unlikely(r != 0)) {
 438                 radeon_object_list_unreserve(head);
 439                 return r;
 440         }
 441         list_for_each_entry(lobj, head, list) {
 442                 robj = lobj->robj;
 443                 if (!robj->pin_count) {
 444                         if (lobj->wdomain) {
 445                                 robj->tobj.proposed_placement =
 446                                         radeon_object_flags_from_domain(lobj->wdomain);
 447                         } else {
 448                                 robj->tobj.proposed_placement =
 449                                         radeon_object_flags_from_domain(lobj->rdomain);
 450                         }
 451                         r = ttm_buffer_object_validate(&robj->tobj,
 452                                                        robj->tobj.proposed_placement,
 453                                                        true, false);
 454                         if (unlikely(r)) {
 455                                 DRM_ERROR("radeon: failed to validate.\n");
 456                                 return r;
 457                         }
 458                         radeon_object_gpu_addr(robj);
 459                 }
 460                 lobj->gpu_offset = robj->gpu_addr;
 461                 lobj->tiling_flags = robj->tiling_flags;
 462                 if (fence) {
 463                         old_fence = (struct radeon_fence *)robj->tobj.sync_obj;
 464                         robj->tobj.sync_obj = radeon_fence_ref(fence);
 465                         robj->tobj.sync_obj_arg = NULL;
 466                 }
 467                 if (old_fence) {
 468                         radeon_fence_unref(&old_fence);
 469                 }
 470         }
 471         return 0;
 472 }
 473
 474 void radeon_object_list_unvalidate(struct list_head *head)
 475 {
 476         struct radeon_object_list *lobj;
 477         struct radeon_fence *old_fence = NULL;
 478
 479         list_for_each_entry(lobj, head, list) {
 480                 old_fence = (struct radeon_fence *)lobj->robj->tobj.sync_obj;
 481                 lobj->robj->tobj.sync_obj = NULL;
 482                 if (old_fence) {
 483                         radeon_fence_unref(&old_fence);
 484                 }
 485         }
 486         radeon_object_list_unreserve(head);
 487 }
 488
 489 void radeon_object_list_clean(struct list_head *head)
 490 {
 491         radeon_object_list_unreserve(head);
 492 }
 493
 494 int radeon_object_fbdev_mmap(struct radeon_object *robj,
 495                              struct vm_area_struct *vma)
 496 {
 497         return ttm_fbdev_mmap(vma, &robj->tobj);
 498 }
 499
 500 unsigned long radeon_object_size(struct radeon_object *robj)
 501 {
 502         return robj->tobj.num_pages << PAGE_SHIFT;
 503 }
 504
 505 int radeon_object_get_surface_reg(struct radeon_object *robj)
 506 {
 507         struct radeon_device *rdev = robj->rdev;
 508         struct radeon_surface_reg *reg;
 509         struct radeon_object *old_object;
 510         int steal;
 511         int i;
 512
 513         if (!robj->tiling_flags)
 514                 return 0;
 515
 516         if (robj->surface_reg >= 0) {
 517                 reg = &rdev->surface_regs[robj->surface_reg];
 518                 i = robj->surface_reg;
 519                 goto out;
 520         }
 521
 522         steal = -1;
 523         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 524
 525                 reg = &rdev->surface_regs[i];
 526                 if (!reg->robj)
 527                         break;
 528
 529                 old_object = reg->robj;
 530                 if (old_object->pin_count == 0)
 531                         steal = i;
 532         }
 533
 534         /* if we are all out */
 535         if (i == RADEON_GEM_MAX_SURFACES) {
 536                 if (steal == -1)
 537                         return -ENOMEM;
 538                 /* find someone with a surface reg and nuke their BO */
 539                 reg = &rdev->surface_regs[steal];
 540                 old_object = reg->robj;
 541                 /* blow away the mapping */
 542                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 543                 ttm_bo_unmap_virtual(&old_object->tobj);
 544                 old_object->surface_reg = -1;
 545                 i = steal;
 546         }
 547
 548         robj->surface_reg = i;
 549         reg->robj = robj;
 550
 551 out:
 552         radeon_set_surface_reg(rdev, i, robj->tiling_flags, robj->pitch,
 553                                robj->tobj.mem.mm_node->start << PAGE_SHIFT,
 554                                robj->tobj.num_pages << PAGE_SHIFT);
 555         return 0;
 556 }
 557
 558 void radeon_object_clear_surface_reg(struct radeon_object *robj)
 559 {
 560         struct radeon_device *rdev = robj->rdev;
 561         struct radeon_surface_reg *reg;
 562
 563         if (robj->surface_reg == -1)
 564                 return;
 565
 566         reg = &rdev->surface_regs[robj->surface_reg];
 567         radeon_clear_surface_reg(rdev, robj->surface_reg);
 568
 569         reg->robj = NULL;
 570         robj->surface_reg = -1;
 571 }
 572
 573 void radeon_object_set_tiling_flags(struct radeon_object *robj,
 574                                     uint32_t tiling_flags, uint32_t pitch)
 575 {
 576         robj->tiling_flags = tiling_flags;
 577         robj->pitch = pitch;
 578 }
 579
 580 void radeon_object_get_tiling_flags(struct radeon_object *robj,
 581                                     uint32_t *tiling_flags,
 582                                     uint32_t *pitch)
 583 {
 584         if (tiling_flags)
 585                 *tiling_flags = robj->tiling_flags;
 586         if (pitch)
 587                 *pitch = robj->pitch;
 588 }
 589
 590 int radeon_object_check_tiling(struct radeon_object *robj, bool has_moved,
 591                                bool force_drop)
 592 {
 593         if (!(robj->tiling_flags & RADEON_TILING_SURFACE))
 594                 return 0;
 595
 596         if (force_drop) {
 597                 radeon_object_clear_surface_reg(robj);
 598                 return 0;
 599         }
 600
 601         if (robj->tobj.mem.mem_type != TTM_PL_VRAM) {
 602                 if (!has_moved)
 603                         return 0;
 604
 605                 if (robj->surface_reg >= 0)
 606                         radeon_object_clear_surface_reg(robj);
 607                 return 0;
 608         }
 609
 610         if ((robj->surface_reg >= 0) && !has_moved)
 611                 return 0;
 612
 613         return radeon_object_get_surface_reg(robj);
 614 }
 615
 616 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 617                           struct ttm_mem_reg *mem)
 618 {
 619         struct radeon_object *robj = container_of(bo, struct radeon_object, tobj);
 620         radeon_object_check_tiling(robj, 0, 1);
 621 }
 622
 623 void radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 624 {
 625         struct radeon_object *robj = container_of(bo, struct radeon_object, tobj);
 626         radeon_object_check_tiling(robj, 0, 0);
 627 }