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 <drm/ttm/ttm_page_alloc.h>
  30
  31 #include "ast_drv.h"
  32
  33 static inline struct ast_private *
  34 ast_bdev(struct ttm_bo_device *bd)
  35 {
  36         return container_of(bd, struct ast_private, ttm.bdev);
  37 }
  38
  39 static int
  40 ast_ttm_mem_global_init(struct drm_global_reference *ref)
  41 {
  42         return ttm_mem_global_init(ref->object);
  43 }
  44
  45 static void
  46 ast_ttm_mem_global_release(struct drm_global_reference *ref)
  47 {
  48         ttm_mem_global_release(ref->object);
  49 }
  50
  51 static int ast_ttm_global_init(struct ast_private *ast)
  52 {
  53         struct drm_global_reference *global_ref;
  54         int r;
  55
  56         global_ref = &ast->ttm.mem_global_ref;
  57         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  58         global_ref->size = sizeof(struct ttm_mem_global);
  59         global_ref->init = &ast_ttm_mem_global_init;
  60         global_ref->release = &ast_ttm_mem_global_release;
  61         r = drm_global_item_ref(global_ref);
  62         if (r != 0) {
  63                 DRM_ERROR("Failed setting up TTM memory accounting "
  64                           "subsystem.\n");
  65                 return r;
  66         }
  67
  68         ast->ttm.bo_global_ref.mem_glob =
  69                 ast->ttm.mem_global_ref.object;
  70         global_ref = &ast->ttm.bo_global_ref.ref;
  71         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  72         global_ref->size = sizeof(struct ttm_bo_global);
  73         global_ref->init = &ttm_bo_global_init;
  74         global_ref->release = &ttm_bo_global_release;
  75         r = drm_global_item_ref(global_ref);
  76         if (r != 0) {
  77                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
  78                 drm_global_item_unref(&ast->ttm.mem_global_ref);
  79                 return r;
  80         }
  81         return 0;
  82 }
  83
  84 static void
  85 ast_ttm_global_release(struct ast_private *ast)
  86 {
  87         if (ast->ttm.mem_global_ref.release == NULL)
  88                 return;
  89
  90         drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
  91         drm_global_item_unref(&ast->ttm.mem_global_ref);
  92         ast->ttm.mem_global_ref.release = NULL;
  93 }
  94
  95
  96 static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  97 {
  98         struct ast_bo *bo;
  99
 100         bo = container_of(tbo, struct ast_bo, bo);
 101
 102         drm_gem_object_release(&bo->gem);
 103         kfree(bo);
 104 }
 105
 106 static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
 107 {
 108         if (bo->destroy == &ast_bo_ttm_destroy)
 109                 return true;
 110         return false;
 111 }
 112
 113 static int
 114 ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 115                      struct ttm_mem_type_manager *man)
 116 {
 117         switch (type) {
 118         case TTM_PL_SYSTEM:
 119                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 120                 man->available_caching = TTM_PL_MASK_CACHING;
 121                 man->default_caching = TTM_PL_FLAG_CACHED;
 122                 break;
 123         case TTM_PL_VRAM:
 124                 man->func = &ttm_bo_manager_func;
 125                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 126                         TTM_MEMTYPE_FLAG_MAPPABLE;
 127                 man->available_caching = TTM_PL_FLAG_UNCACHED |
 128                         TTM_PL_FLAG_WC;
 129                 man->default_caching = TTM_PL_FLAG_WC;
 130                 break;
 131         default:
 132                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 133                 return -EINVAL;
 134         }
 135         return 0;
 136 }
 137
 138 static void
 139 ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 140 {
 141         struct ast_bo *astbo = ast_bo(bo);
 142
 143         if (!ast_ttm_bo_is_ast_bo(bo))
 144                 return;
 145
 146         ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
 147         *pl = astbo->placement;
 148 }
 149
 150 static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 151 {
 152         struct ast_bo *astbo = ast_bo(bo);
 153
 154         return drm_vma_node_verify_access(&astbo->gem.vma_node,
 155                                           filp->private_data);
 156 }
 157
 158 static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 159                                   struct ttm_mem_reg *mem)
 160 {
 161         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 162         struct ast_private *ast = ast_bdev(bdev);
 163
 164         mem->bus.addr = NULL;
 165         mem->bus.offset = 0;
 166         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 167         mem->bus.base = 0;
 168         mem->bus.is_iomem = false;
 169         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 170                 return -EINVAL;
 171         switch (mem->mem_type) {
 172         case TTM_PL_SYSTEM:
 173                 /* system memory */
 174                 return 0;
 175         case TTM_PL_VRAM:
 176                 mem->bus.offset = mem->start << PAGE_SHIFT;
 177                 mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
 178                 mem->bus.is_iomem = true;
 179                 break;
 180         default:
 181                 return -EINVAL;
 182                 break;
 183         }
 184         return 0;
 185 }
 186
 187 static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 188 {
 189 }
 190
 191 static void ast_ttm_backend_destroy(struct ttm_tt *tt)
 192 {
 193         ttm_tt_fini(tt);
 194         kfree(tt);
 195 }
 196
 197 static struct ttm_backend_func ast_tt_backend_func = {
 198         .destroy = &ast_ttm_backend_destroy,
 199 };
 200
 201
 202 static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
 203                                  unsigned long size, uint32_t page_flags,
 204                                  struct page *dummy_read_page)
 205 {
 206         struct ttm_tt *tt;
 207
 208         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 209         if (tt == NULL)
 210                 return NULL;
 211         tt->func = &ast_tt_backend_func;
 212         if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
 213                 kfree(tt);
 214                 return NULL;
 215         }
 216         return tt;
 217 }
 218
 219 static int ast_ttm_tt_populate(struct ttm_tt *ttm)
 220 {
 221         return ttm_pool_populate(ttm);
 222 }
 223
 224 static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
 225 {
 226         ttm_pool_unpopulate(ttm);
 227 }
 228
 229 struct ttm_bo_driver ast_bo_driver = {
 230         .ttm_tt_create = ast_ttm_tt_create,
 231         .ttm_tt_populate = ast_ttm_tt_populate,
 232         .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
 233         .init_mem_type = ast_bo_init_mem_type,
 234         .eviction_valuable = ttm_bo_eviction_valuable,
 235         .evict_flags = ast_bo_evict_flags,
 236         .move = NULL,
 237         .verify_access = ast_bo_verify_access,
 238         .io_mem_reserve = &ast_ttm_io_mem_reserve,
 239         .io_mem_free = &ast_ttm_io_mem_free,
 240         .io_mem_pfn = ttm_bo_default_io_mem_pfn,
 241 };
 242
 243 int ast_mm_init(struct ast_private *ast)
 244 {
 245         int ret;
 246         struct drm_device *dev = ast->dev;
 247         struct ttm_bo_device *bdev = &ast->ttm.bdev;
 248
 249         ret = ast_ttm_global_init(ast);
 250         if (ret)
 251                 return ret;
 252
 253         ret = ttm_bo_device_init(&ast->ttm.bdev,
 254                                  ast->ttm.bo_global_ref.ref.object,
 255                                  &ast_bo_driver,
 256                                  dev->anon_inode->i_mapping,
 257                                  DRM_FILE_PAGE_OFFSET,
 258                                  true);
 259         if (ret) {
 260                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 261                 return ret;
 262         }
 263
 264         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
 265                              ast->vram_size >> PAGE_SHIFT);
 266         if (ret) {
 267                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 268                 return ret;
 269         }
 270
 271         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
 272                                    pci_resource_len(dev->pdev, 0));
 273         ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
 274                                         pci_resource_len(dev->pdev, 0));
 275
 276         return 0;
 277 }
 278
 279 void ast_mm_fini(struct ast_private *ast)
 280 {
 281         struct drm_device *dev = ast->dev;
 282
 283         ttm_bo_device_release(&ast->ttm.bdev);
 284
 285         ast_ttm_global_release(ast);
 286
 287         arch_phys_wc_del(ast->fb_mtrr);
 288         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
 289                                 pci_resource_len(dev->pdev, 0));
 290 }
 291
 292 void ast_ttm_placement(struct ast_bo *bo, int domain)
 293 {
 294         u32 c = 0;
 295         unsigned i;
 296
 297         bo->placement.placement = bo->placements;
 298         bo->placement.busy_placement = bo->placements;
 299         if (domain & TTM_PL_FLAG_VRAM)
 300                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 301         if (domain & TTM_PL_FLAG_SYSTEM)
 302                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 303         if (!c)
 304                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 305         bo->placement.num_placement = c;
 306         bo->placement.num_busy_placement = c;
 307         for (i = 0; i < c; ++i) {
 308                 bo->placements[i].fpfn = 0;
 309                 bo->placements[i].lpfn = 0;
 310         }
 311 }
 312
 313 int ast_bo_create(struct drm_device *dev, int size, int align,
 314                   uint32_t flags, struct ast_bo **pastbo)
 315 {
 316         struct ast_private *ast = dev->dev_private;
 317         struct ast_bo *astbo;
 318         size_t acc_size;
 319         int ret;
 320
 321         astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
 322         if (!astbo)
 323                 return -ENOMEM;
 324
 325         ret = drm_gem_object_init(dev, &astbo->gem, size);
 326         if (ret)
 327                 goto error;
 328
 329         astbo->bo.bdev = &ast->ttm.bdev;
 330
 331         ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 332
 333         acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
 334                                        sizeof(struct ast_bo));
 335
 336         ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
 337                           ttm_bo_type_device, &astbo->placement,
 338                           align >> PAGE_SHIFT, false, NULL, acc_size,
 339                           NULL, NULL, ast_bo_ttm_destroy);
 340         if (ret)
 341                 goto error;
 342
 343         *pastbo = astbo;
 344         return 0;
 345 error:
 346         kfree(astbo);
 347         return ret;
 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;
 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         return ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 392 }
 393
 394 int ast_bo_push_sysram(struct ast_bo *bo)
 395 {
 396         int i, ret;
 397         if (!bo->pin_count) {
 398                 DRM_ERROR("unpin bad %p\n", bo);
 399                 return 0;
 400         }
 401         bo->pin_count--;
 402         if (bo->pin_count)
 403                 return 0;
 404
 405         if (bo->kmap.virtual)
 406                 ttm_bo_kunmap(&bo->kmap);
 407
 408         ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 409         for (i = 0; i < bo->placement.num_placement ; i++)
 410                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 411
 412         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 413         if (ret) {
 414                 DRM_ERROR("pushing to VRAM failed\n");
 415                 return ret;
 416         }
 417         return 0;
 418 }
 419
 420 int ast_mmap(struct file *filp, struct vm_area_struct *vma)
 421 {
 422         struct drm_file *file_priv;
 423         struct ast_private *ast;
 424
 425         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 426                 return -EINVAL;
 427
 428         file_priv = filp->private_data;
 429         ast = file_priv->minor->dev->dev_private;
 430         return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
 431 }