drivers/gpu/drm/qxl/qxl_ttm.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Dave Airlie
  23  *          Alon Levy
  24  */
  25
  26 #include <ttm/ttm_bo_api.h>
  27 #include <ttm/ttm_bo_driver.h>
  28 #include <ttm/ttm_placement.h>
  29 #include <ttm/ttm_page_alloc.h>
  30 #include <ttm/ttm_module.h>
  31 #include <drm/drmP.h>
  32 #include <drm/drm.h>
  33 #include <drm/qxl_drm.h>
  34 #include "qxl_drv.h"
  35 #include "qxl_object.h"
  36
  37 #include <linux/delay.h>
  38 static int qxl_ttm_debugfs_init(struct qxl_device *qdev);
  39
  40 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
  41 {
  42         struct qxl_mman *mman;
  43         struct qxl_device *qdev;
  44
  45         mman = container_of(bdev, struct qxl_mman, bdev);
  46         qdev = container_of(mman, struct qxl_device, mman);
  47         return qdev;
  48 }
  49
  50 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref)
  51 {
  52         return ttm_mem_global_init(ref->object);
  53 }
  54
  55 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref)
  56 {
  57         ttm_mem_global_release(ref->object);
  58 }
  59
  60 static int qxl_ttm_global_init(struct qxl_device *qdev)
  61 {
  62         struct drm_global_reference *global_ref;
  63         int r;
  64
  65         qdev->mman.mem_global_referenced = false;
  66         global_ref = &qdev->mman.mem_global_ref;
  67         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  68         global_ref->size = sizeof(struct ttm_mem_global);
  69         global_ref->init = &qxl_ttm_mem_global_init;
  70         global_ref->release = &qxl_ttm_mem_global_release;
  71
  72         r = drm_global_item_ref(global_ref);
  73         if (r != 0) {
  74                 DRM_ERROR("Failed setting up TTM memory accounting "
  75                           "subsystem.\n");
  76                 return r;
  77         }
  78
  79         qdev->mman.bo_global_ref.mem_glob =
  80                 qdev->mman.mem_global_ref.object;
  81         global_ref = &qdev->mman.bo_global_ref.ref;
  82         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  83         global_ref->size = sizeof(struct ttm_bo_global);
  84         global_ref->init = &ttm_bo_global_init;
  85         global_ref->release = &ttm_bo_global_release;
  86         r = drm_global_item_ref(global_ref);
  87         if (r != 0) {
  88                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
  89                 drm_global_item_unref(&qdev->mman.mem_global_ref);
  90                 return r;
  91         }
  92
  93         qdev->mman.mem_global_referenced = true;
  94         return 0;
  95 }
  96
  97 static void qxl_ttm_global_fini(struct qxl_device *qdev)
  98 {
  99         if (qdev->mman.mem_global_referenced) {
 100                 drm_global_item_unref(&qdev->mman.bo_global_ref.ref);
 101                 drm_global_item_unref(&qdev->mman.mem_global_ref);
 102                 qdev->mman.mem_global_referenced = false;
 103         }
 104 }
 105
 106 static struct vm_operations_struct qxl_ttm_vm_ops;
 107 static const struct vm_operations_struct *ttm_vm_ops;
 108
 109 static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 110 {
 111         struct ttm_buffer_object *bo;
 112         struct qxl_device *qdev;
 113         int r;
 114
 115         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 116         if (bo == NULL)
 117                 return VM_FAULT_NOPAGE;
 118         qdev = qxl_get_qdev(bo->bdev);
 119         r = ttm_vm_ops->fault(vma, vmf);
 120         return r;
 121 }
 122
 123 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 124 {
 125         struct drm_file *file_priv;
 126         struct qxl_device *qdev;
 127         int r;
 128
 129         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 130                 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n",
 131                         __func__, vma->vm_pgoff);
 132                 return drm_mmap(filp, vma);
 133         }
 134
 135         file_priv = filp->private_data;
 136         qdev = file_priv->minor->dev->dev_private;
 137         if (qdev == NULL) {
 138                 DRM_ERROR(
 139                  "filp->private_data->minor->dev->dev_private == NULL\n");
 140                 return -EINVAL;
 141         }
 142         QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
 143                  __func__, filp->private_data, vma->vm_pgoff);
 144
 145         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
 146         if (unlikely(r != 0))
 147                 return r;
 148         if (unlikely(ttm_vm_ops == NULL)) {
 149                 ttm_vm_ops = vma->vm_ops;
 150                 qxl_ttm_vm_ops = *ttm_vm_ops;
 151                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
 152         }
 153         vma->vm_ops = &qxl_ttm_vm_ops;
 154         return 0;
 155 }
 156
 157 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 158 {
 159         return 0;
 160 }
 161
 162 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 163                              struct ttm_mem_type_manager *man)
 164 {
 165         struct qxl_device *qdev;
 166
 167         qdev = qxl_get_qdev(bdev);
 168
 169         switch (type) {
 170         case TTM_PL_SYSTEM:
 171                 /* System memory */
 172                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 173                 man->available_caching = TTM_PL_MASK_CACHING;
 174                 man->default_caching = TTM_PL_FLAG_CACHED;
 175                 break;
 176         case TTM_PL_VRAM:
 177         case TTM_PL_PRIV0:
 178                 /* "On-card" video ram */
 179                 man->func = &ttm_bo_manager_func;
 180                 man->gpu_offset = 0;
 181                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 182                              TTM_MEMTYPE_FLAG_MAPPABLE;
 183                 man->available_caching = TTM_PL_MASK_CACHING;
 184                 man->default_caching = TTM_PL_FLAG_CACHED;
 185                 break;
 186         default:
 187                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 188                 return -EINVAL;
 189         }
 190         return 0;
 191 }
 192
 193 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 194                                 struct ttm_placement *placement)
 195 {
 196         struct qxl_bo *qbo;
 197         static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 198
 199         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 200                 placement->fpfn = 0;
 201                 placement->lpfn = 0;
 202                 placement->placement = &placements;
 203                 placement->busy_placement = &placements;
 204                 placement->num_placement = 1;
 205                 placement->num_busy_placement = 1;
 206                 return;
 207         }
 208         qbo = container_of(bo, struct qxl_bo, tbo);
 209         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 210         *placement = qbo->placement;
 211 }
 212
 213 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 214 {
 215         struct qxl_bo *qbo = to_qxl_bo(bo);
 216
 217         return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp);
 218 }
 219
 220 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 221                                   struct ttm_mem_reg *mem)
 222 {
 223         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 224         struct qxl_device *qdev = qxl_get_qdev(bdev);
 225
 226         mem->bus.addr = NULL;
 227         mem->bus.offset = 0;
 228         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 229         mem->bus.base = 0;
 230         mem->bus.is_iomem = false;
 231         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 232                 return -EINVAL;
 233         switch (mem->mem_type) {
 234         case TTM_PL_SYSTEM:
 235                 /* system memory */
 236                 return 0;
 237         case TTM_PL_VRAM:
 238                 mem->bus.is_iomem = true;
 239                 mem->bus.base = qdev->vram_base;
 240                 mem->bus.offset = mem->start << PAGE_SHIFT;
 241                 break;
 242         case TTM_PL_PRIV0:
 243                 mem->bus.is_iomem = true;
 244                 mem->bus.base = qdev->surfaceram_base;
 245                 mem->bus.offset = mem->start << PAGE_SHIFT;
 246                 break;
 247         default:
 248                 return -EINVAL;
 249         }
 250         return 0;
 251 }
 252
 253 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 254                                 struct ttm_mem_reg *mem)
 255 {
 256 }
 257
 258 /*
 259  * TTM backend functions.
 260  */
 261 struct qxl_ttm_tt {
 262         struct ttm_dma_tt               ttm;
 263         struct qxl_device               *qdev;
 264         u64                             offset;
 265 };
 266
 267 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 268                                 struct ttm_mem_reg *bo_mem)
 269 {
 270         struct qxl_ttm_tt *gtt = (void *)ttm;
 271
 272         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 273         if (!ttm->num_pages) {
 274                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 275                      ttm->num_pages, bo_mem, ttm);
 276         }
 277         /* Not implemented */
 278         return -1;
 279 }
 280
 281 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 282 {
 283         /* Not implemented */
 284         return -1;
 285 }
 286
 287 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 288 {
 289         struct qxl_ttm_tt *gtt = (void *)ttm;
 290
 291         ttm_dma_tt_fini(&gtt->ttm);
 292         kfree(gtt);
 293 }
 294
 295 static struct ttm_backend_func qxl_backend_func = {
 296         .bind = &qxl_ttm_backend_bind,
 297         .unbind = &qxl_ttm_backend_unbind,
 298         .destroy = &qxl_ttm_backend_destroy,
 299 };
 300
 301 static int qxl_ttm_tt_populate(struct ttm_tt *ttm)
 302 {
 303         int r;
 304
 305         if (ttm->state != tt_unpopulated)
 306                 return 0;
 307
 308         r = ttm_pool_populate(ttm);
 309         if (r)
 310                 return r;
 311
 312         return 0;
 313 }
 314
 315 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
 316 {
 317         ttm_pool_unpopulate(ttm);
 318 }
 319
 320 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
 321                                         unsigned long size, uint32_t page_flags,
 322                                         struct page *dummy_read_page)
 323 {
 324         struct qxl_device *qdev;
 325         struct qxl_ttm_tt *gtt;
 326
 327         qdev = qxl_get_qdev(bdev);
 328         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 329         if (gtt == NULL)
 330                 return NULL;
 331         gtt->ttm.ttm.func = &qxl_backend_func;
 332         gtt->qdev = qdev;
 333         if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
 334                             dummy_read_page)) {
 335                 kfree(gtt);
 336                 return NULL;
 337         }
 338         return &gtt->ttm.ttm;
 339 }
 340
 341 static void qxl_move_null(struct ttm_buffer_object *bo,
 342                              struct ttm_mem_reg *new_mem)
 343 {
 344         struct ttm_mem_reg *old_mem = &bo->mem;
 345
 346         BUG_ON(old_mem->mm_node != NULL);
 347         *old_mem = *new_mem;
 348         new_mem->mm_node = NULL;
 349 }
 350
 351 static int qxl_bo_move(struct ttm_buffer_object *bo,
 352                        bool evict, bool interruptible,
 353                        bool no_wait_gpu,
 354                        struct ttm_mem_reg *new_mem)
 355 {
 356         struct ttm_mem_reg *old_mem = &bo->mem;
 357         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 358                 qxl_move_null(bo, new_mem);
 359                 return 0;
 360         }
 361         return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
 362 }
 363
 364
 365 static int qxl_sync_obj_wait(void *sync_obj,
 366                              bool lazy, bool interruptible)
 367 {
 368         struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
 369         int count = 0, sc = 0;
 370         struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence);
 371
 372         if (qfence->num_active_releases == 0)
 373                 return 0;
 374
 375 retry:
 376         if (sc == 0) {
 377                 if (bo->type == QXL_GEM_DOMAIN_SURFACE)
 378                         qxl_update_surface(qfence->qdev, bo);
 379         } else if (sc >= 1) {
 380                 qxl_io_notify_oom(qfence->qdev);
 381         }
 382
 383         sc++;
 384
 385         for (count = 0; count < 10; count++) {
 386                 bool ret;
 387                 ret = qxl_queue_garbage_collect(qfence->qdev, true);
 388                 if (ret == false)
 389                         break;
 390
 391                 if (qfence->num_active_releases == 0)
 392                         return 0;
 393         }
 394
 395         if (qfence->num_active_releases) {
 396                 bool have_drawable_releases = false;
 397                 void **slot;
 398                 struct radix_tree_iter iter;
 399                 int release_id;
 400
 401                 radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) {
 402                         struct qxl_release *release;
 403
 404                         release_id = iter.index;
 405                         release = qxl_release_from_id_locked(qfence->qdev, release_id);
 406                         if (release == NULL)
 407                                 continue;
 408
 409                         if (release->type == QXL_RELEASE_DRAWABLE)
 410                                 have_drawable_releases = true;
 411                 }
 412
 413                 qxl_queue_garbage_collect(qfence->qdev, true);
 414
 415                 if (have_drawable_releases || sc < 4) {
 416                         if (sc > 2)
 417                                 /* back off */
 418                                 usleep_range(500, 1000);
 419                         if (have_drawable_releases && sc > 300) {
 420                                 WARN(1, "sync obj %d still has outstanding releases %d %d %d %ld %d\n", sc, bo->surface_id, bo->is_primary, bo->pin_count, (unsigned long)bo->gem_base.size, qfence->num_active_releases);
 421                                 return -EBUSY;
 422                         }
 423                         goto retry;
 424                 }
 425         }
 426         return 0;
 427 }
 428
 429 static int qxl_sync_obj_flush(void *sync_obj)
 430 {
 431         return 0;
 432 }
 433
 434 static void qxl_sync_obj_unref(void **sync_obj)
 435 {
 436         *sync_obj = NULL;
 437 }
 438
 439 static void *qxl_sync_obj_ref(void *sync_obj)
 440 {
 441         return sync_obj;
 442 }
 443
 444 static bool qxl_sync_obj_signaled(void *sync_obj)
 445 {
 446         struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
 447         return (qfence->num_active_releases == 0);
 448 }
 449
 450 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 451                                struct ttm_mem_reg *new_mem)
 452 {
 453         struct qxl_bo *qbo;
 454         struct qxl_device *qdev;
 455
 456         if (!qxl_ttm_bo_is_qxl_bo(bo))
 457                 return;
 458         qbo = container_of(bo, struct qxl_bo, tbo);
 459         qdev = qbo->gem_base.dev->dev_private;
 460
 461         if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id)
 462                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 463 }
 464
 465 static struct ttm_bo_driver qxl_bo_driver = {
 466         .ttm_tt_create = &qxl_ttm_tt_create,
 467         .ttm_tt_populate = &qxl_ttm_tt_populate,
 468         .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate,
 469         .invalidate_caches = &qxl_invalidate_caches,
 470         .init_mem_type = &qxl_init_mem_type,
 471         .evict_flags = &qxl_evict_flags,
 472         .move = &qxl_bo_move,
 473         .verify_access = &qxl_verify_access,
 474         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 475         .io_mem_free = &qxl_ttm_io_mem_free,
 476         .sync_obj_signaled = &qxl_sync_obj_signaled,
 477         .sync_obj_wait = &qxl_sync_obj_wait,
 478         .sync_obj_flush = &qxl_sync_obj_flush,
 479         .sync_obj_unref = &qxl_sync_obj_unref,
 480         .sync_obj_ref = &qxl_sync_obj_ref,
 481         .move_notify = &qxl_bo_move_notify,
 482 };
 483
 484
 485
 486 int qxl_ttm_init(struct qxl_device *qdev)
 487 {
 488         int r;
 489         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 490
 491         r = qxl_ttm_global_init(qdev);
 492         if (r)
 493                 return r;
 494         /* No others user of address space so set it to 0 */
 495         r = ttm_bo_device_init(&qdev->mman.bdev,
 496                                qdev->mman.bo_global_ref.ref.object,
 497                                &qxl_bo_driver, DRM_FILE_PAGE_OFFSET, 0);
 498         if (r) {
 499                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 500                 return r;
 501         }
 502         /* NOTE: this includes the framebuffer (aka surface 0) */
 503         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 504         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 505                            num_io_pages);
 506         if (r) {
 507                 DRM_ERROR("Failed initializing VRAM heap.\n");
 508                 return r;
 509         }
 510         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0,
 511                            qdev->surfaceram_size / PAGE_SIZE);
 512         if (r) {
 513                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 514                 return r;
 515         }
 516         DRM_INFO("qxl: %uM of VRAM memory size\n",
 517                  (unsigned)qdev->vram_size / (1024 * 1024));
 518         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 519                  ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 520         if (unlikely(qdev->mman.bdev.dev_mapping == NULL))
 521                 qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping;
 522         r = qxl_ttm_debugfs_init(qdev);
 523         if (r) {
 524                 DRM_ERROR("Failed to init debugfs\n");
 525                 return r;
 526         }
 527         return 0;
 528 }
 529
 530 void qxl_ttm_fini(struct qxl_device *qdev)
 531 {
 532         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 533         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
 534         ttm_bo_device_release(&qdev->mman.bdev);
 535         qxl_ttm_global_fini(qdev);
 536         DRM_INFO("qxl: ttm finalized\n");
 537 }
 538
 539
 540 #define QXL_DEBUGFS_MEM_TYPES 2
 541
 542 #if defined(CONFIG_DEBUG_FS)
 543 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 544 {
 545         struct drm_info_node *node = (struct drm_info_node *)m->private;
 546         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 547         struct drm_device *dev = node->minor->dev;
 548         struct qxl_device *rdev = dev->dev_private;
 549         int ret;
 550         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 551
 552         spin_lock(&glob->lru_lock);
 553         ret = drm_mm_dump_table(m, mm);
 554         spin_unlock(&glob->lru_lock);
 555         return ret;
 556 }
 557 #endif
 558
 559 static int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 560 {
 561 #if defined(CONFIG_DEBUG_FS)
 562         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 563         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 564         unsigned i;
 565
 566         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 567                 if (i == 0)
 568                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 569                 else
 570                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 571                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 572                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 573                 qxl_mem_types_list[i].driver_features = 0;
 574                 if (i == 0)
 575                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 576                 else
 577                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv;
 578
 579         }
 580         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 581 #else
 582         return 0;
 583 #endif
 584 }