kernel/drivers/gpu/drm/ast/ast_ttm.c

   1 /*
   2  * Copyright 2012 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
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  27  */
  28 #include <drm/drmP.h>
  29 #include "ast_drv.h"
  30 #include <ttm/ttm_page_alloc.h>
  31
  32 static inline struct ast_private *
  33 ast_bdev(struct ttm_bo_device *bd)
  34 {
  35         return container_of(bd, struct ast_private, ttm.bdev);
  36 }
  37
  38 static int
  39 ast_ttm_mem_global_init(struct drm_global_reference *ref)
  40 {
  41         return ttm_mem_global_init(ref->object);
  42 }
  43
  44 static void
  45 ast_ttm_mem_global_release(struct drm_global_reference *ref)
  46 {
  47         ttm_mem_global_release(ref->object);
  48 }
  49
  50 static int ast_ttm_global_init(struct ast_private *ast)
  51 {
  52         struct drm_global_reference *global_ref;
  53         int r;
  54
  55         global_ref = &ast->ttm.mem_global_ref;
  56         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  57         global_ref->size = sizeof(struct ttm_mem_global);
  58         global_ref->init = &ast_ttm_mem_global_init;
  59         global_ref->release = &ast_ttm_mem_global_release;
  60         r = drm_global_item_ref(global_ref);
  61         if (r != 0) {
  62                 DRM_ERROR("Failed setting up TTM memory accounting "
  63                           "subsystem.\n");
  64                 return r;
  65         }
  66
  67         ast->ttm.bo_global_ref.mem_glob =
  68                 ast->ttm.mem_global_ref.object;
  69         global_ref = &ast->ttm.bo_global_ref.ref;
  70         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  71         global_ref->size = sizeof(struct ttm_bo_global);
  72         global_ref->init = &ttm_bo_global_init;
  73         global_ref->release = &ttm_bo_global_release;
  74         r = drm_global_item_ref(global_ref);
  75         if (r != 0) {
  76                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
  77                 drm_global_item_unref(&ast->ttm.mem_global_ref);
  78                 return r;
  79         }
  80         return 0;
  81 }
  82
  83 static void
  84 ast_ttm_global_release(struct ast_private *ast)
  85 {
  86         if (ast->ttm.mem_global_ref.release == NULL)
  87                 return;
  88
  89         drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
  90         drm_global_item_unref(&ast->ttm.mem_global_ref);
  91         ast->ttm.mem_global_ref.release = NULL;
  92 }
  93
  94
  95 static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  96 {
  97         struct ast_bo *bo;
  98
  99         bo = container_of(tbo, struct ast_bo, bo);
 100
 101         drm_gem_object_release(&bo->gem);
 102         kfree(bo);
 103 }
 104
 105 static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
 106 {
 107         if (bo->destroy == &ast_bo_ttm_destroy)
 108                 return true;
 109         return false;
 110 }
 111
 112 static int
 113 ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 114                      struct ttm_mem_type_manager *man)
 115 {
 116         switch (type) {
 117         case TTM_PL_SYSTEM:
 118                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 119                 man->available_caching = TTM_PL_MASK_CACHING;
 120                 man->default_caching = TTM_PL_FLAG_CACHED;
 121                 break;
 122         case TTM_PL_VRAM:
 123                 man->func = &ttm_bo_manager_func;
 124                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 125                         TTM_MEMTYPE_FLAG_MAPPABLE;
 126                 man->available_caching = TTM_PL_FLAG_UNCACHED |
 127                         TTM_PL_FLAG_WC;
 128                 man->default_caching = TTM_PL_FLAG_WC;
 129                 break;
 130         default:
 131                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 132                 return -EINVAL;
 133         }
 134         return 0;
 135 }
 136
 137 static void
 138 ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 139 {
 140         struct ast_bo *astbo = ast_bo(bo);
 141
 142         if (!ast_ttm_bo_is_ast_bo(bo))
 143                 return;
 144
 145         ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
 146         *pl = astbo->placement;
 147 }
 148
 149 static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 150 {
 151         struct ast_bo *astbo = ast_bo(bo);
 152
 153         return drm_vma_node_verify_access(&astbo->gem.vma_node, filp);
 154 }
 155
 156 static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 157                                   struct ttm_mem_reg *mem)
 158 {
 159         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 160         struct ast_private *ast = ast_bdev(bdev);
 161
 162         mem->bus.addr = NULL;
 163         mem->bus.offset = 0;
 164         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 165         mem->bus.base = 0;
 166         mem->bus.is_iomem = false;
 167         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 168                 return -EINVAL;
 169         switch (mem->mem_type) {
 170         case TTM_PL_SYSTEM:
 171                 /* system memory */
 172                 return 0;
 173         case TTM_PL_VRAM:
 174                 mem->bus.offset = mem->start << PAGE_SHIFT;
 175                 mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
 176                 mem->bus.is_iomem = true;
 177                 break;
 178         default:
 179                 return -EINVAL;
 180                 break;
 181         }
 182         return 0;
 183 }
 184
 185 static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 186 {
 187 }
 188
 189 static int ast_bo_move(struct ttm_buffer_object *bo,
 190                        bool evict, bool interruptible,
 191                        bool no_wait_gpu,
 192                        struct ttm_mem_reg *new_mem)
 193 {
 194         int r;
 195         r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
 196         return r;
 197 }
 198
 199
 200 static void ast_ttm_backend_destroy(struct ttm_tt *tt)
 201 {
 202         ttm_tt_fini(tt);
 203         kfree(tt);
 204 }
 205
 206 static struct ttm_backend_func ast_tt_backend_func = {
 207         .destroy = &ast_ttm_backend_destroy,
 208 };
 209
 210
 211 static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
 212                                  unsigned long size, uint32_t page_flags,
 213                                  struct page *dummy_read_page)
 214 {
 215         struct ttm_tt *tt;
 216
 217         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 218         if (tt == NULL)
 219                 return NULL;
 220         tt->func = &ast_tt_backend_func;
 221         if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
 222                 kfree(tt);
 223                 return NULL;
 224         }
 225         return tt;
 226 }
 227
 228 static int ast_ttm_tt_populate(struct ttm_tt *ttm)
 229 {
 230         return ttm_pool_populate(ttm);
 231 }
 232
 233 static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
 234 {
 235         ttm_pool_unpopulate(ttm);
 236 }
 237
 238 struct ttm_bo_driver ast_bo_driver = {
 239         .ttm_tt_create = ast_ttm_tt_create,
 240         .ttm_tt_populate = ast_ttm_tt_populate,
 241         .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
 242         .init_mem_type = ast_bo_init_mem_type,
 243         .evict_flags = ast_bo_evict_flags,
 244         .move = ast_bo_move,
 245         .verify_access = ast_bo_verify_access,
 246         .io_mem_reserve = &ast_ttm_io_mem_reserve,
 247         .io_mem_free = &ast_ttm_io_mem_free,
 248 };
 249
 250 int ast_mm_init(struct ast_private *ast)
 251 {
 252         int ret;
 253         struct drm_device *dev = ast->dev;
 254         struct ttm_bo_device *bdev = &ast->ttm.bdev;
 255
 256         ret = ast_ttm_global_init(ast);
 257         if (ret)
 258                 return ret;
 259
 260         ret = ttm_bo_device_init(&ast->ttm.bdev,
 261                                  ast->ttm.bo_global_ref.ref.object,
 262                                  &ast_bo_driver,
 263                                  dev->anon_inode->i_mapping,
 264                                  DRM_FILE_PAGE_OFFSET,
 265                                  true);
 266         if (ret) {
 267                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 268                 return ret;
 269         }
 270
 271         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
 272                              ast->vram_size >> PAGE_SHIFT);
 273         if (ret) {
 274                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 275                 return ret;
 276         }
 277
 278         ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
 279                                         pci_resource_len(dev->pdev, 0));
 280
 281         return 0;
 282 }
 283
 284 void ast_mm_fini(struct ast_private *ast)
 285 {
 286         ttm_bo_device_release(&ast->ttm.bdev);
 287
 288         ast_ttm_global_release(ast);
 289
 290         arch_phys_wc_del(ast->fb_mtrr);
 291 }
 292
 293 void ast_ttm_placement(struct ast_bo *bo, int domain)
 294 {
 295         u32 c = 0;
 296         unsigned i;
 297
 298         bo->placement.placement = bo->placements;
 299         bo->placement.busy_placement = bo->placements;
 300         if (domain & TTM_PL_FLAG_VRAM)
 301                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 302         if (domain & TTM_PL_FLAG_SYSTEM)
 303                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 304         if (!c)
 305                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 306         bo->placement.num_placement = c;
 307         bo->placement.num_busy_placement = c;
 308         for (i = 0; i < c; ++i) {
 309                 bo->placements[i].fpfn = 0;
 310                 bo->placements[i].lpfn = 0;
 311         }
 312 }
 313
 314 int ast_bo_create(struct drm_device *dev, int size, int align,
 315                   uint32_t flags, struct ast_bo **pastbo)
 316 {
 317         struct ast_private *ast = dev->dev_private;
 318         struct ast_bo *astbo;
 319         size_t acc_size;
 320         int ret;
 321
 322         astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
 323         if (!astbo)
 324                 return -ENOMEM;
 325
 326         ret = drm_gem_object_init(dev, &astbo->gem, size);
 327         if (ret) {
 328                 kfree(astbo);
 329                 return ret;
 330         }
 331
 332         astbo->bo.bdev = &ast->ttm.bdev;
 333
 334         ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 335
 336         acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
 337                                        sizeof(struct ast_bo));
 338
 339         ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
 340                           ttm_bo_type_device, &astbo->placement,
 341                           align >> PAGE_SHIFT, false, NULL, acc_size,
 342                           NULL, NULL, ast_bo_ttm_destroy);
 343         if (ret)
 344                 return ret;
 345
 346         *pastbo = astbo;
 347         return 0;
 348 }
 349
 350 static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
 351 {
 352         return bo->bo.offset;
 353 }
 354
 355 int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
 356 {
 357         int i, ret;
 358
 359         if (bo->pin_count) {
 360                 bo->pin_count++;
 361                 if (gpu_addr)
 362                         *gpu_addr = ast_bo_gpu_offset(bo);
 363         }
 364
 365         ast_ttm_placement(bo, pl_flag);
 366         for (i = 0; i < bo->placement.num_placement; i++)
 367                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 368         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 369         if (ret)
 370                 return ret;
 371
 372         bo->pin_count = 1;
 373         if (gpu_addr)
 374                 *gpu_addr = ast_bo_gpu_offset(bo);
 375         return 0;
 376 }
 377
 378 int ast_bo_unpin(struct ast_bo *bo)
 379 {
 380         int i, ret;
 381         if (!bo->pin_count) {
 382                 DRM_ERROR("unpin bad %p\n", bo);
 383                 return 0;
 384         }
 385         bo->pin_count--;
 386         if (bo->pin_count)
 387                 return 0;
 388
 389         for (i = 0; i < bo->placement.num_placement ; i++)
 390                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 391         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 392         if (ret)
 393                 return ret;
 394
 395         return 0;
 396 }
 397
 398 int ast_bo_push_sysram(struct ast_bo *bo)
 399 {
 400         int i, ret;
 401         if (!bo->pin_count) {
 402                 DRM_ERROR("unpin bad %p\n", bo);
 403                 return 0;
 404         }
 405         bo->pin_count--;
 406         if (bo->pin_count)
 407                 return 0;
 408
 409         if (bo->kmap.virtual)
 410                 ttm_bo_kunmap(&bo->kmap);
 411
 412         ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 413         for (i = 0; i < bo->placement.num_placement ; i++)
 414                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 415
 416         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 417         if (ret) {
 418                 DRM_ERROR("pushing to VRAM failed\n");
 419                 return ret;
 420         }
 421         return 0;
 422 }
 423
 424 int ast_mmap(struct file *filp, struct vm_area_struct *vma)
 425 {
 426         struct drm_file *file_priv;
 427         struct ast_private *ast;
 428
 429         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 430                 return -EINVAL;
 431
 432         file_priv = filp->private_data;
 433         ast = file_priv->minor->dev->dev_private;
 434         return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
 435 }