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         int r;
 113
 114         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 115         if (bo == NULL)
 116                 return VM_FAULT_NOPAGE;
 117         r = ttm_vm_ops->fault(vma, vmf);
 118         return r;
 119 }
 120
 121 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 122 {
 123         struct drm_file *file_priv;
 124         struct qxl_device *qdev;
 125         int r;
 126
 127         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 128                 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n",
 129                         __func__, vma->vm_pgoff);
 130                 return drm_mmap(filp, vma);
 131         }
 132
 133         file_priv = filp->private_data;
 134         qdev = file_priv->minor->dev->dev_private;
 135         if (qdev == NULL) {
 136                 DRM_ERROR(
 137                  "filp->private_data->minor->dev->dev_private == NULL\n");
 138                 return -EINVAL;
 139         }
 140         QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
 141                  __func__, filp->private_data, vma->vm_pgoff);
 142
 143         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
 144         if (unlikely(r != 0))
 145                 return r;
 146         if (unlikely(ttm_vm_ops == NULL)) {
 147                 ttm_vm_ops = vma->vm_ops;
 148                 qxl_ttm_vm_ops = *ttm_vm_ops;
 149                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
 150         }
 151         vma->vm_ops = &qxl_ttm_vm_ops;
 152         return 0;
 153 }
 154
 155 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 156 {
 157         return 0;
 158 }
 159
 160 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 161                              struct ttm_mem_type_manager *man)
 162 {
 163         switch (type) {
 164         case TTM_PL_SYSTEM:
 165                 /* System memory */
 166                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 167                 man->available_caching = TTM_PL_MASK_CACHING;
 168                 man->default_caching = TTM_PL_FLAG_CACHED;
 169                 break;
 170         case TTM_PL_VRAM:
 171         case TTM_PL_PRIV0:
 172                 /* "On-card" video ram */
 173                 man->func = &ttm_bo_manager_func;
 174                 man->gpu_offset = 0;
 175                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 176                              TTM_MEMTYPE_FLAG_MAPPABLE;
 177                 man->available_caching = TTM_PL_MASK_CACHING;
 178                 man->default_caching = TTM_PL_FLAG_CACHED;
 179                 break;
 180         default:
 181                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 182                 return -EINVAL;
 183         }
 184         return 0;
 185 }
 186
 187 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 188                                 struct ttm_placement *placement)
 189 {
 190         struct qxl_bo *qbo;
 191         static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 192
 193         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 194                 placement->fpfn = 0;
 195                 placement->lpfn = 0;
 196                 placement->placement = &placements;
 197                 placement->busy_placement = &placements;
 198                 placement->num_placement = 1;
 199                 placement->num_busy_placement = 1;
 200                 return;
 201         }
 202         qbo = container_of(bo, struct qxl_bo, tbo);
 203         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 204         *placement = qbo->placement;
 205 }
 206
 207 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 208 {
 209         struct qxl_bo *qbo = to_qxl_bo(bo);
 210
 211         return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp);
 212 }
 213
 214 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 215                                   struct ttm_mem_reg *mem)
 216 {
 217         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 218         struct qxl_device *qdev = qxl_get_qdev(bdev);
 219
 220         mem->bus.addr = NULL;
 221         mem->bus.offset = 0;
 222         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 223         mem->bus.base = 0;
 224         mem->bus.is_iomem = false;
 225         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 226                 return -EINVAL;
 227         switch (mem->mem_type) {
 228         case TTM_PL_SYSTEM:
 229                 /* system memory */
 230                 return 0;
 231         case TTM_PL_VRAM:
 232                 mem->bus.is_iomem = true;
 233                 mem->bus.base = qdev->vram_base;
 234                 mem->bus.offset = mem->start << PAGE_SHIFT;
 235                 break;
 236         case TTM_PL_PRIV0:
 237                 mem->bus.is_iomem = true;
 238                 mem->bus.base = qdev->surfaceram_base;
 239                 mem->bus.offset = mem->start << PAGE_SHIFT;
 240                 break;
 241         default:
 242                 return -EINVAL;
 243         }
 244         return 0;
 245 }
 246
 247 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 248                                 struct ttm_mem_reg *mem)
 249 {
 250 }
 251
 252 /*
 253  * TTM backend functions.
 254  */
 255 struct qxl_ttm_tt {
 256         struct ttm_dma_tt               ttm;
 257         struct qxl_device               *qdev;
 258         u64                             offset;
 259 };
 260
 261 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 262                                 struct ttm_mem_reg *bo_mem)
 263 {
 264         struct qxl_ttm_tt *gtt = (void *)ttm;
 265
 266         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 267         if (!ttm->num_pages) {
 268                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 269                      ttm->num_pages, bo_mem, ttm);
 270         }
 271         /* Not implemented */
 272         return -1;
 273 }
 274
 275 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 276 {
 277         /* Not implemented */
 278         return -1;
 279 }
 280
 281 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 282 {
 283         struct qxl_ttm_tt *gtt = (void *)ttm;
 284
 285         ttm_dma_tt_fini(&gtt->ttm);
 286         kfree(gtt);
 287 }
 288
 289 static struct ttm_backend_func qxl_backend_func = {
 290         .bind = &qxl_ttm_backend_bind,
 291         .unbind = &qxl_ttm_backend_unbind,
 292         .destroy = &qxl_ttm_backend_destroy,
 293 };
 294
 295 static int qxl_ttm_tt_populate(struct ttm_tt *ttm)
 296 {
 297         int r;
 298
 299         if (ttm->state != tt_unpopulated)
 300                 return 0;
 301
 302         r = ttm_pool_populate(ttm);
 303         if (r)
 304                 return r;
 305
 306         return 0;
 307 }
 308
 309 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
 310 {
 311         ttm_pool_unpopulate(ttm);
 312 }
 313
 314 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
 315                                         unsigned long size, uint32_t page_flags,
 316                                         struct page *dummy_read_page)
 317 {
 318         struct qxl_device *qdev;
 319         struct qxl_ttm_tt *gtt;
 320
 321         qdev = qxl_get_qdev(bdev);
 322         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 323         if (gtt == NULL)
 324                 return NULL;
 325         gtt->ttm.ttm.func = &qxl_backend_func;
 326         gtt->qdev = qdev;
 327         if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
 328                             dummy_read_page)) {
 329                 kfree(gtt);
 330                 return NULL;
 331         }
 332         return &gtt->ttm.ttm;
 333 }
 334
 335 static void qxl_move_null(struct ttm_buffer_object *bo,
 336                              struct ttm_mem_reg *new_mem)
 337 {
 338         struct ttm_mem_reg *old_mem = &bo->mem;
 339
 340         BUG_ON(old_mem->mm_node != NULL);
 341         *old_mem = *new_mem;
 342         new_mem->mm_node = NULL;
 343 }
 344
 345 static int qxl_bo_move(struct ttm_buffer_object *bo,
 346                        bool evict, bool interruptible,
 347                        bool no_wait_gpu,
 348                        struct ttm_mem_reg *new_mem)
 349 {
 350         struct ttm_mem_reg *old_mem = &bo->mem;
 351         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 352                 qxl_move_null(bo, new_mem);
 353                 return 0;
 354         }
 355         return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
 356 }
 357
 358
 359 static int qxl_sync_obj_wait(void *sync_obj,
 360                              bool lazy, bool interruptible)
 361 {
 362         struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
 363         int count = 0, sc = 0;
 364         struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence);
 365
 366         if (qfence->num_active_releases == 0)
 367                 return 0;
 368
 369 retry:
 370         if (sc == 0) {
 371                 if (bo->type == QXL_GEM_DOMAIN_SURFACE)
 372                         qxl_update_surface(qfence->qdev, bo);
 373         } else if (sc >= 1) {
 374                 qxl_io_notify_oom(qfence->qdev);
 375         }
 376
 377         sc++;
 378
 379         for (count = 0; count < 10; count++) {
 380                 bool ret;
 381                 ret = qxl_queue_garbage_collect(qfence->qdev, true);
 382                 if (ret == false)
 383                         break;
 384
 385                 if (qfence->num_active_releases == 0)
 386                         return 0;
 387         }
 388
 389         if (qfence->num_active_releases) {
 390                 bool have_drawable_releases = false;
 391                 void **slot;
 392                 struct radix_tree_iter iter;
 393                 int release_id;
 394
 395                 radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) {
 396                         struct qxl_release *release;
 397
 398                         release_id = iter.index;
 399                         release = qxl_release_from_id_locked(qfence->qdev, release_id);
 400                         if (release == NULL)
 401                                 continue;
 402
 403                         if (release->type == QXL_RELEASE_DRAWABLE)
 404                                 have_drawable_releases = true;
 405                 }
 406
 407                 qxl_queue_garbage_collect(qfence->qdev, true);
 408
 409                 if (have_drawable_releases || sc < 4) {
 410                         if (sc > 2)
 411                                 /* back off */
 412                                 usleep_range(500, 1000);
 413                         if (have_drawable_releases && sc > 300) {
 414                                 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);
 415                                 return -EBUSY;
 416                         }
 417                         goto retry;
 418                 }
 419         }
 420         return 0;
 421 }
 422
 423 static int qxl_sync_obj_flush(void *sync_obj)
 424 {
 425         return 0;
 426 }
 427
 428 static void qxl_sync_obj_unref(void **sync_obj)
 429 {
 430         *sync_obj = NULL;
 431 }
 432
 433 static void *qxl_sync_obj_ref(void *sync_obj)
 434 {
 435         return sync_obj;
 436 }
 437
 438 static bool qxl_sync_obj_signaled(void *sync_obj)
 439 {
 440         struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
 441         return (qfence->num_active_releases == 0);
 442 }
 443
 444 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 445                                struct ttm_mem_reg *new_mem)
 446 {
 447         struct qxl_bo *qbo;
 448         struct qxl_device *qdev;
 449
 450         if (!qxl_ttm_bo_is_qxl_bo(bo))
 451                 return;
 452         qbo = container_of(bo, struct qxl_bo, tbo);
 453         qdev = qbo->gem_base.dev->dev_private;
 454
 455         if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id)
 456                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 457 }
 458
 459 static struct ttm_bo_driver qxl_bo_driver = {
 460         .ttm_tt_create = &qxl_ttm_tt_create,
 461         .ttm_tt_populate = &qxl_ttm_tt_populate,
 462         .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate,
 463         .invalidate_caches = &qxl_invalidate_caches,
 464         .init_mem_type = &qxl_init_mem_type,
 465         .evict_flags = &qxl_evict_flags,
 466         .move = &qxl_bo_move,
 467         .verify_access = &qxl_verify_access,
 468         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 469         .io_mem_free = &qxl_ttm_io_mem_free,
 470         .sync_obj_signaled = &qxl_sync_obj_signaled,
 471         .sync_obj_wait = &qxl_sync_obj_wait,
 472         .sync_obj_flush = &qxl_sync_obj_flush,
 473         .sync_obj_unref = &qxl_sync_obj_unref,
 474         .sync_obj_ref = &qxl_sync_obj_ref,
 475         .move_notify = &qxl_bo_move_notify,
 476 };
 477
 478
 479
 480 int qxl_ttm_init(struct qxl_device *qdev)
 481 {
 482         int r;
 483         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 484
 485         r = qxl_ttm_global_init(qdev);
 486         if (r)
 487                 return r;
 488         /* No others user of address space so set it to 0 */
 489         r = ttm_bo_device_init(&qdev->mman.bdev,
 490                                qdev->mman.bo_global_ref.ref.object,
 491                                &qxl_bo_driver,
 492                                qdev->ddev->anon_inode->i_mapping,
 493                                DRM_FILE_PAGE_OFFSET, 0);
 494         if (r) {
 495                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 496                 return r;
 497         }
 498         /* NOTE: this includes the framebuffer (aka surface 0) */
 499         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 500         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 501                            num_io_pages);
 502         if (r) {
 503                 DRM_ERROR("Failed initializing VRAM heap.\n");
 504                 return r;
 505         }
 506         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0,
 507                            qdev->surfaceram_size / PAGE_SIZE);
 508         if (r) {
 509                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 510                 return r;
 511         }
 512         DRM_INFO("qxl: %uM of VRAM memory size\n",
 513                  (unsigned)qdev->vram_size / (1024 * 1024));
 514         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 515                  ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 516         DRM_INFO("qxl: %uM of Surface memory size\n",
 517                  (unsigned)qdev->surfaceram_size / (1024 * 1024));
 518         r = qxl_ttm_debugfs_init(qdev);
 519         if (r) {
 520                 DRM_ERROR("Failed to init debugfs\n");
 521                 return r;
 522         }
 523         return 0;
 524 }
 525
 526 void qxl_ttm_fini(struct qxl_device *qdev)
 527 {
 528         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 529         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
 530         ttm_bo_device_release(&qdev->mman.bdev);
 531         qxl_ttm_global_fini(qdev);
 532         DRM_INFO("qxl: ttm finalized\n");
 533 }
 534
 535
 536 #define QXL_DEBUGFS_MEM_TYPES 2
 537
 538 #if defined(CONFIG_DEBUG_FS)
 539 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 540 {
 541         struct drm_info_node *node = (struct drm_info_node *)m->private;
 542         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 543         struct drm_device *dev = node->minor->dev;
 544         struct qxl_device *rdev = dev->dev_private;
 545         int ret;
 546         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 547
 548         spin_lock(&glob->lru_lock);
 549         ret = drm_mm_dump_table(m, mm);
 550         spin_unlock(&glob->lru_lock);
 551         return ret;
 552 }
 553 #endif
 554
 555 static int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 556 {
 557 #if defined(CONFIG_DEBUG_FS)
 558         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 559         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 560         unsigned i;
 561
 562         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 563                 if (i == 0)
 564                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 565                 else
 566                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 567                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 568                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 569                 qxl_mem_types_list[i].driver_features = 0;
 570                 if (i == 0)
 571                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 572                 else
 573                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv;
 574
 575         }
 576         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 577 #else
 578         return 0;
 579 #endif
 580 }