drivers/gpu/drm/mgag200/mgag200_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 "mgag200_drv.h"
  32
  33 static inline struct mga_device *
  34 mgag200_bdev(struct ttm_bo_device *bd)
  35 {
  36         return container_of(bd, struct mga_device, ttm.bdev);
  37 }
  38
  39 static int
  40 mgag200_ttm_mem_global_init(struct drm_global_reference *ref)
  41 {
  42         return ttm_mem_global_init(ref->object);
  43 }
  44
  45 static void
  46 mgag200_ttm_mem_global_release(struct drm_global_reference *ref)
  47 {
  48         ttm_mem_global_release(ref->object);
  49 }
  50
  51 static int mgag200_ttm_global_init(struct mga_device *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 = &mgag200_ttm_mem_global_init;
  60         global_ref->release = &mgag200_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 mgag200_ttm_global_release(struct mga_device *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 mgag200_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  97 {
  98         struct mgag200_bo *bo;
  99
 100         bo = container_of(tbo, struct mgag200_bo, bo);
 101
 102         drm_gem_object_release(&bo->gem);
 103         kfree(bo);
 104 }
 105
 106 static bool mgag200_ttm_bo_is_mgag200_bo(struct ttm_buffer_object *bo)
 107 {
 108         if (bo->destroy == &mgag200_bo_ttm_destroy)
 109                 return true;
 110         return false;
 111 }
 112
 113 static int
 114 mgag200_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 mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 140 {
 141         struct mgag200_bo *mgabo = mgag200_bo(bo);
 142
 143         if (!mgag200_ttm_bo_is_mgag200_bo(bo))
 144                 return;
 145
 146         mgag200_ttm_placement(mgabo, TTM_PL_FLAG_SYSTEM);
 147         *pl = mgabo->placement;
 148 }
 149
 150 static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 151 {
 152         struct mgag200_bo *mgabo = mgag200_bo(bo);
 153
 154         return drm_vma_node_verify_access(&mgabo->gem.vma_node,
 155                                           filp->private_data);
 156 }
 157
 158 static int mgag200_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 mga_device *mdev = mgag200_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(mdev->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 mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 188 {
 189 }
 190
 191 static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
 192 {
 193         ttm_tt_fini(tt);
 194         kfree(tt);
 195 }
 196
 197 static struct ttm_backend_func mgag200_tt_backend_func = {
 198         .destroy = &mgag200_ttm_backend_destroy,
 199 };
 200
 201
 202 static struct ttm_tt *mgag200_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 = &mgag200_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 mgag200_ttm_tt_populate(struct ttm_tt *ttm,
 220                         struct ttm_operation_ctx *ctx)
 221 {
 222         return ttm_pool_populate(ttm, ctx);
 223 }
 224
 225 static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
 226 {
 227         ttm_pool_unpopulate(ttm);
 228 }
 229
 230 struct ttm_bo_driver mgag200_bo_driver = {
 231         .ttm_tt_create = mgag200_ttm_tt_create,
 232         .ttm_tt_populate = mgag200_ttm_tt_populate,
 233         .ttm_tt_unpopulate = mgag200_ttm_tt_unpopulate,
 234         .init_mem_type = mgag200_bo_init_mem_type,
 235         .eviction_valuable = ttm_bo_eviction_valuable,
 236         .evict_flags = mgag200_bo_evict_flags,
 237         .move = NULL,
 238         .verify_access = mgag200_bo_verify_access,
 239         .io_mem_reserve = &mgag200_ttm_io_mem_reserve,
 240         .io_mem_free = &mgag200_ttm_io_mem_free,
 241 };
 242
 243 int mgag200_mm_init(struct mga_device *mdev)
 244 {
 245         int ret;
 246         struct drm_device *dev = mdev->dev;
 247         struct ttm_bo_device *bdev = &mdev->ttm.bdev;
 248
 249         ret = mgag200_ttm_global_init(mdev);
 250         if (ret)
 251                 return ret;
 252
 253         ret = ttm_bo_device_init(&mdev->ttm.bdev,
 254                                  mdev->ttm.bo_global_ref.ref.object,
 255                                  &mgag200_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, mdev->mc.vram_size >> PAGE_SHIFT);
 265         if (ret) {
 266                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 267                 return ret;
 268         }
 269
 270         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
 271                                    pci_resource_len(dev->pdev, 0));
 272
 273         mdev->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 mgag200_mm_fini(struct mga_device *mdev)
 280 {
 281         struct drm_device *dev = mdev->dev;
 282
 283         ttm_bo_device_release(&mdev->ttm.bdev);
 284
 285         mgag200_ttm_global_release(mdev);
 286
 287         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
 288                                 pci_resource_len(dev->pdev, 0));
 289         arch_phys_wc_del(mdev->fb_mtrr);
 290         mdev->fb_mtrr = 0;
 291 }
 292
 293 void mgag200_ttm_placement(struct mgag200_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_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 304         if (!c)
 305                 bo->placements[c++].flags = TTM_PL_MASK_CACHING | 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 mgag200_bo_create(struct drm_device *dev, int size, int align,
 315                   uint32_t flags, struct mgag200_bo **pmgabo)
 316 {
 317         struct mga_device *mdev = dev->dev_private;
 318         struct mgag200_bo *mgabo;
 319         size_t acc_size;
 320         int ret;
 321
 322         mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
 323         if (!mgabo)
 324                 return -ENOMEM;
 325
 326         ret = drm_gem_object_init(dev, &mgabo->gem, size);
 327         if (ret) {
 328                 kfree(mgabo);
 329                 return ret;
 330         }
 331
 332         mgabo->bo.bdev = &mdev->ttm.bdev;
 333
 334         mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 335
 336         acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
 337                                        sizeof(struct mgag200_bo));
 338
 339         ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
 340                           ttm_bo_type_device, &mgabo->placement,
 341                           align >> PAGE_SHIFT, false, NULL, acc_size,
 342                           NULL, NULL, mgag200_bo_ttm_destroy);
 343         if (ret)
 344                 return ret;
 345
 346         *pmgabo = mgabo;
 347         return 0;
 348 }
 349
 350 static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
 351 {
 352         return bo->bo.offset;
 353 }
 354
 355 int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
 356 {
 357         struct ttm_operation_ctx ctx = { false, false };
 358         int i, ret;
 359
 360         if (bo->pin_count) {
 361                 bo->pin_count++;
 362                 if (gpu_addr)
 363                         *gpu_addr = mgag200_bo_gpu_offset(bo);
 364                 return 0;
 365         }
 366
 367         mgag200_ttm_placement(bo, pl_flag);
 368         for (i = 0; i < bo->placement.num_placement; i++)
 369                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 370         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 371         if (ret)
 372                 return ret;
 373
 374         bo->pin_count = 1;
 375         if (gpu_addr)
 376                 *gpu_addr = mgag200_bo_gpu_offset(bo);
 377         return 0;
 378 }
 379
 380 int mgag200_bo_unpin(struct mgag200_bo *bo)
 381 {
 382         struct ttm_operation_ctx ctx = { false, false };
 383         int i;
 384         if (!bo->pin_count) {
 385                 DRM_ERROR("unpin bad %p\n", bo);
 386                 return 0;
 387         }
 388         bo->pin_count--;
 389         if (bo->pin_count)
 390                 return 0;
 391
 392         for (i = 0; i < bo->placement.num_placement ; i++)
 393                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 394         return ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 395 }
 396
 397 int mgag200_bo_push_sysram(struct mgag200_bo *bo)
 398 {
 399         struct ttm_operation_ctx ctx = { false, false };
 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         mgag200_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, &ctx);
 417         if (ret) {
 418                 DRM_ERROR("pushing to VRAM failed\n");
 419                 return ret;
 420         }
 421         return 0;
 422 }
 423
 424 int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
 425 {
 426         struct drm_file *file_priv;
 427         struct mga_device *mdev;
 428
 429         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 430                 return -EINVAL;
 431
 432         file_priv = filp->private_data;
 433         mdev = file_priv->minor->dev->dev_private;
 434         return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
 435 }