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 "mgag200_drv.h"
  30 #include <ttm/ttm_page_alloc.h>
  31
  32 static inline struct mga_device *
  33 mgag200_bdev(struct ttm_bo_device *bd)
  34 {
  35         return container_of(bd, struct mga_device, ttm.bdev);
  36 }
  37
  38 static int
  39 mgag200_ttm_mem_global_init(struct drm_global_reference *ref)
  40 {
  41         return ttm_mem_global_init(ref->object);
  42 }
  43
  44 static void
  45 mgag200_ttm_mem_global_release(struct drm_global_reference *ref)
  46 {
  47         ttm_mem_global_release(ref->object);
  48 }
  49
  50 static int mgag200_ttm_global_init(struct mga_device *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 = &mgag200_ttm_mem_global_init;
  59         global_ref->release = &mgag200_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 void
  84 mgag200_ttm_global_release(struct mga_device *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 mgag200_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  96 {
  97         struct mgag200_bo *bo;
  98
  99         bo = container_of(tbo, struct mgag200_bo, bo);
 100
 101         drm_gem_object_release(&bo->gem);
 102         kfree(bo);
 103 }
 104
 105 bool mgag200_ttm_bo_is_mgag200_bo(struct ttm_buffer_object *bo)
 106 {
 107         if (bo->destroy == &mgag200_bo_ttm_destroy)
 108                 return true;
 109         return false;
 110 }
 111
 112 static int
 113 mgag200_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 mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 139 {
 140         struct mgag200_bo *mgabo = mgag200_bo(bo);
 141
 142         if (!mgag200_ttm_bo_is_mgag200_bo(bo))
 143                 return;
 144
 145         mgag200_ttm_placement(mgabo, TTM_PL_FLAG_SYSTEM);
 146         *pl = mgabo->placement;
 147 }
 148
 149 static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 150 {
 151         return 0;
 152 }
 153
 154 static int mgag200_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 155                                   struct ttm_mem_reg *mem)
 156 {
 157         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 158         struct mga_device *mdev = mgag200_bdev(bdev);
 159
 160         mem->bus.addr = NULL;
 161         mem->bus.offset = 0;
 162         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 163         mem->bus.base = 0;
 164         mem->bus.is_iomem = false;
 165         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 166                 return -EINVAL;
 167         switch (mem->mem_type) {
 168         case TTM_PL_SYSTEM:
 169                 /* system memory */
 170                 return 0;
 171         case TTM_PL_VRAM:
 172                 mem->bus.offset = mem->start << PAGE_SHIFT;
 173                 mem->bus.base = pci_resource_start(mdev->dev->pdev, 0);
 174                 mem->bus.is_iomem = true;
 175                 break;
 176         default:
 177                 return -EINVAL;
 178                 break;
 179         }
 180         return 0;
 181 }
 182
 183 static void mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 184 {
 185 }
 186
 187 static int mgag200_bo_move(struct ttm_buffer_object *bo,
 188                        bool evict, bool interruptible,
 189                        bool no_wait_reserve, bool no_wait_gpu,
 190                        struct ttm_mem_reg *new_mem)
 191 {
 192         int r;
 193         r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
 194         return r;
 195 }
 196
 197
 198 static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
 199 {
 200         ttm_tt_fini(tt);
 201         kfree(tt);
 202 }
 203
 204 static struct ttm_backend_func mgag200_tt_backend_func = {
 205         .destroy = &mgag200_ttm_backend_destroy,
 206 };
 207
 208
 209 struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
 210                                  unsigned long size, uint32_t page_flags,
 211                                  struct page *dummy_read_page)
 212 {
 213         struct ttm_tt *tt;
 214
 215         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 216         if (tt == NULL)
 217                 return NULL;
 218         tt->func = &mgag200_tt_backend_func;
 219         if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
 220                 kfree(tt);
 221                 return NULL;
 222         }
 223         return tt;
 224 }
 225
 226 static int mgag200_ttm_tt_populate(struct ttm_tt *ttm)
 227 {
 228         return ttm_pool_populate(ttm);
 229 }
 230
 231 static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
 232 {
 233         ttm_pool_unpopulate(ttm);
 234 }
 235
 236 struct ttm_bo_driver mgag200_bo_driver = {
 237         .ttm_tt_create = mgag200_ttm_tt_create,
 238         .ttm_tt_populate = mgag200_ttm_tt_populate,
 239         .ttm_tt_unpopulate = mgag200_ttm_tt_unpopulate,
 240         .init_mem_type = mgag200_bo_init_mem_type,
 241         .evict_flags = mgag200_bo_evict_flags,
 242         .move = mgag200_bo_move,
 243         .verify_access = mgag200_bo_verify_access,
 244         .io_mem_reserve = &mgag200_ttm_io_mem_reserve,
 245         .io_mem_free = &mgag200_ttm_io_mem_free,
 246 };
 247
 248 int mgag200_mm_init(struct mga_device *mdev)
 249 {
 250         int ret;
 251         struct drm_device *dev = mdev->dev;
 252         struct ttm_bo_device *bdev = &mdev->ttm.bdev;
 253
 254         ret = mgag200_ttm_global_init(mdev);
 255         if (ret)
 256                 return ret;
 257
 258         ret = ttm_bo_device_init(&mdev->ttm.bdev,
 259                                  mdev->ttm.bo_global_ref.ref.object,
 260                                  &mgag200_bo_driver, DRM_FILE_PAGE_OFFSET,
 261                                  true);
 262         if (ret) {
 263                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 264                 return ret;
 265         }
 266
 267         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, mdev->mc.vram_size >> PAGE_SHIFT);
 268         if (ret) {
 269                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 270                 return ret;
 271         }
 272
 273         mdev->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
 274                                     pci_resource_len(dev->pdev, 0),
 275                                     DRM_MTRR_WC);
 276
 277         return 0;
 278 }
 279
 280 void mgag200_mm_fini(struct mga_device *mdev)
 281 {
 282         struct drm_device *dev = mdev->dev;
 283         ttm_bo_device_release(&mdev->ttm.bdev);
 284
 285         mgag200_ttm_global_release(mdev);
 286
 287         if (mdev->fb_mtrr >= 0) {
 288                 drm_mtrr_del(mdev->fb_mtrr,
 289                              pci_resource_start(dev->pdev, 0),
 290                              pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
 291                 mdev->fb_mtrr = -1;
 292         }
 293 }
 294
 295 void mgag200_ttm_placement(struct mgag200_bo *bo, int domain)
 296 {
 297         u32 c = 0;
 298         bo->placement.fpfn = 0;
 299         bo->placement.lpfn = 0;
 300         bo->placement.placement = bo->placements;
 301         bo->placement.busy_placement = bo->placements;
 302         if (domain & TTM_PL_FLAG_VRAM)
 303                 bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 304         if (domain & TTM_PL_FLAG_SYSTEM)
 305                 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 306         if (!c)
 307                 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 308         bo->placement.num_placement = c;
 309         bo->placement.num_busy_placement = c;
 310 }
 311
 312 int mgag200_bo_reserve(struct mgag200_bo *bo, bool no_wait)
 313 {
 314         int ret;
 315
 316         ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
 317         if (ret) {
 318                 if (ret != -ERESTARTSYS)
 319                         DRM_ERROR("reserve failed %p\n", bo);
 320                 return ret;
 321         }
 322         return 0;
 323 }
 324
 325 void mgag200_bo_unreserve(struct mgag200_bo *bo)
 326 {
 327         ttm_bo_unreserve(&bo->bo);
 328 }
 329
 330 int mgag200_bo_create(struct drm_device *dev, int size, int align,
 331                   uint32_t flags, struct mgag200_bo **pmgabo)
 332 {
 333         struct mga_device *mdev = dev->dev_private;
 334         struct mgag200_bo *mgabo;
 335         size_t acc_size;
 336         int ret;
 337
 338         mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
 339         if (!mgabo)
 340                 return -ENOMEM;
 341
 342         ret = drm_gem_object_init(dev, &mgabo->gem, size);
 343         if (ret) {
 344                 kfree(mgabo);
 345                 return ret;
 346         }
 347
 348         mgabo->gem.driver_private = NULL;
 349         mgabo->bo.bdev = &mdev->ttm.bdev;
 350
 351         mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 352
 353         acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
 354                                        sizeof(struct mgag200_bo));
 355
 356         ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
 357                           ttm_bo_type_device, &mgabo->placement,
 358                           align >> PAGE_SHIFT, 0, false, NULL, acc_size,
 359                           NULL, mgag200_bo_ttm_destroy);
 360         if (ret)
 361                 return ret;
 362
 363         *pmgabo = mgabo;
 364         return 0;
 365 }
 366
 367 static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
 368 {
 369         return bo->bo.offset;
 370 }
 371
 372 int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
 373 {
 374         int i, ret;
 375
 376         if (bo->pin_count) {
 377                 bo->pin_count++;
 378                 if (gpu_addr)
 379                         *gpu_addr = mgag200_bo_gpu_offset(bo);
 380         }
 381
 382         mgag200_ttm_placement(bo, pl_flag);
 383         for (i = 0; i < bo->placement.num_placement; i++)
 384                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 385         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
 386         if (ret)
 387                 return ret;
 388
 389         bo->pin_count = 1;
 390         if (gpu_addr)
 391                 *gpu_addr = mgag200_bo_gpu_offset(bo);
 392         return 0;
 393 }
 394
 395 int mgag200_bo_unpin(struct mgag200_bo *bo)
 396 {
 397         int i, ret;
 398         if (!bo->pin_count) {
 399                 DRM_ERROR("unpin bad %p\n", bo);
 400                 return 0;
 401         }
 402         bo->pin_count--;
 403         if (bo->pin_count)
 404                 return 0;
 405
 406         for (i = 0; i < bo->placement.num_placement ; i++)
 407                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 408         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
 409         if (ret)
 410                 return ret;
 411
 412         return 0;
 413 }
 414
 415 int mgag200_bo_push_sysram(struct mgag200_bo *bo)
 416 {
 417         int i, ret;
 418         if (!bo->pin_count) {
 419                 DRM_ERROR("unpin bad %p\n", bo);
 420                 return 0;
 421         }
 422         bo->pin_count--;
 423         if (bo->pin_count)
 424                 return 0;
 425
 426         if (bo->kmap.virtual)
 427                 ttm_bo_kunmap(&bo->kmap);
 428
 429         mgag200_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 430         for (i = 0; i < bo->placement.num_placement ; i++)
 431                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 432
 433         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
 434         if (ret) {
 435                 DRM_ERROR("pushing to VRAM failed\n");
 436                 return ret;
 437         }
 438         return 0;
 439 }
 440
 441 int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
 442 {
 443         struct drm_file *file_priv;
 444         struct mga_device *mdev;
 445
 446         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 447                 return drm_mmap(filp, vma);
 448
 449         file_priv = filp->private_data;
 450         mdev = file_priv->minor->dev->dev_private;
 451         return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
 452 }