drivers/gpu/drm/cirrus/cirrus_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 "cirrus_drv.h"
  30 #include <ttm/ttm_page_alloc.h>
  31
  32 static inline struct cirrus_device *
  33 cirrus_bdev(struct ttm_bo_device *bd)
  34 {
  35         return container_of(bd, struct cirrus_device, ttm.bdev);
  36 }
  37
  38 static int
  39 cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
  40 {
  41         return ttm_mem_global_init(ref->object);
  42 }
  43
  44 static void
  45 cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
  46 {
  47         ttm_mem_global_release(ref->object);
  48 }
  49
  50 static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
  51 {
  52         struct drm_global_reference *global_ref;
  53         int r;
  54
  55         global_ref = &cirrus->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 = &cirrus_ttm_mem_global_init;
  59         global_ref->release = &cirrus_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         cirrus->ttm.bo_global_ref.mem_glob =
  68                 cirrus->ttm.mem_global_ref.object;
  69         global_ref = &cirrus->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(&cirrus->ttm.mem_global_ref);
  78                 return r;
  79         }
  80         return 0;
  81 }
  82
  83 void
  84 cirrus_ttm_global_release(struct cirrus_device *cirrus)
  85 {
  86         if (cirrus->ttm.mem_global_ref.release == NULL)
  87                 return;
  88
  89         drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
  90         drm_global_item_unref(&cirrus->ttm.mem_global_ref);
  91         cirrus->ttm.mem_global_ref.release = NULL;
  92 }
  93
  94
  95 static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  96 {
  97         struct cirrus_bo *bo;
  98
  99         bo = container_of(tbo, struct cirrus_bo, bo);
 100
 101         drm_gem_object_release(&bo->gem);
 102         kfree(bo);
 103 }
 104
 105 bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
 106 {
 107         if (bo->destroy == &cirrus_bo_ttm_destroy)
 108                 return true;
 109         return false;
 110 }
 111
 112 static int
 113 cirrus_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 cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 139 {
 140         struct cirrus_bo *cirrusbo = cirrus_bo(bo);
 141
 142         if (!cirrus_ttm_bo_is_cirrus_bo(bo))
 143                 return;
 144
 145         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
 146         *pl = cirrusbo->placement;
 147 }
 148
 149 static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 150 {
 151         return 0;
 152 }
 153
 154 static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->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 cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 184 {
 185 }
 186
 187 static int cirrus_bo_move(struct ttm_buffer_object *bo,
 188                        bool evict, bool interruptible,
 189                        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_gpu, new_mem);
 194         return r;
 195 }
 196
 197
 198 static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
 199 {
 200         ttm_tt_fini(tt);
 201         kfree(tt);
 202 }
 203
 204 static struct ttm_backend_func cirrus_tt_backend_func = {
 205         .destroy = &cirrus_ttm_backend_destroy,
 206 };
 207
 208
 209 struct ttm_tt *cirrus_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 = &cirrus_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 cirrus_ttm_tt_populate(struct ttm_tt *ttm)
 227 {
 228         return ttm_pool_populate(ttm);
 229 }
 230
 231 static void cirrus_ttm_tt_unpopulate(struct ttm_tt *ttm)
 232 {
 233         ttm_pool_unpopulate(ttm);
 234 }
 235
 236 struct ttm_bo_driver cirrus_bo_driver = {
 237         .ttm_tt_create = cirrus_ttm_tt_create,
 238         .ttm_tt_populate = cirrus_ttm_tt_populate,
 239         .ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
 240         .init_mem_type = cirrus_bo_init_mem_type,
 241         .evict_flags = cirrus_bo_evict_flags,
 242         .move = cirrus_bo_move,
 243         .verify_access = cirrus_bo_verify_access,
 244         .io_mem_reserve = &cirrus_ttm_io_mem_reserve,
 245         .io_mem_free = &cirrus_ttm_io_mem_free,
 246 };
 247
 248 int cirrus_mm_init(struct cirrus_device *cirrus)
 249 {
 250         int ret;
 251         struct drm_device *dev = cirrus->dev;
 252         struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
 253
 254         ret = cirrus_ttm_global_init(cirrus);
 255         if (ret)
 256                 return ret;
 257
 258         ret = ttm_bo_device_init(&cirrus->ttm.bdev,
 259                                  cirrus->ttm.bo_global_ref.ref.object,
 260                                  &cirrus_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,
 268                              cirrus->mc.vram_size >> PAGE_SHIFT);
 269         if (ret) {
 270                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 271                 return ret;
 272         }
 273
 274         cirrus->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
 275                                     pci_resource_len(dev->pdev, 0),
 276                                     DRM_MTRR_WC);
 277
 278         cirrus->mm_inited = true;
 279         return 0;
 280 }
 281
 282 void cirrus_mm_fini(struct cirrus_device *cirrus)
 283 {
 284         struct drm_device *dev = cirrus->dev;
 285
 286         if (!cirrus->mm_inited)
 287                 return;
 288
 289         ttm_bo_device_release(&cirrus->ttm.bdev);
 290
 291         cirrus_ttm_global_release(cirrus);
 292
 293         if (cirrus->fb_mtrr >= 0) {
 294                 drm_mtrr_del(cirrus->fb_mtrr,
 295                              pci_resource_start(dev->pdev, 0),
 296                              pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
 297                 cirrus->fb_mtrr = -1;
 298         }
 299 }
 300
 301 void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
 302 {
 303         u32 c = 0;
 304         bo->placement.fpfn = 0;
 305         bo->placement.lpfn = 0;
 306         bo->placement.placement = bo->placements;
 307         bo->placement.busy_placement = bo->placements;
 308         if (domain & TTM_PL_FLAG_VRAM)
 309                 bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 310         if (domain & TTM_PL_FLAG_SYSTEM)
 311                 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 312         if (!c)
 313                 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 314         bo->placement.num_placement = c;
 315         bo->placement.num_busy_placement = c;
 316 }
 317
 318 int cirrus_bo_reserve(struct cirrus_bo *bo, bool no_wait)
 319 {
 320         int ret;
 321
 322         ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
 323         if (ret) {
 324                 if (ret != -ERESTARTSYS && ret != -EBUSY)
 325                         DRM_ERROR("reserve failed %p\n", bo);
 326                 return ret;
 327         }
 328         return 0;
 329 }
 330
 331 void cirrus_bo_unreserve(struct cirrus_bo *bo)
 332 {
 333         ttm_bo_unreserve(&bo->bo);
 334 }
 335
 336 int cirrus_bo_create(struct drm_device *dev, int size, int align,
 337                   uint32_t flags, struct cirrus_bo **pcirrusbo)
 338 {
 339         struct cirrus_device *cirrus = dev->dev_private;
 340         struct cirrus_bo *cirrusbo;
 341         size_t acc_size;
 342         int ret;
 343
 344         cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
 345         if (!cirrusbo)
 346                 return -ENOMEM;
 347
 348         ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
 349         if (ret) {
 350                 kfree(cirrusbo);
 351                 return ret;
 352         }
 353
 354         cirrusbo->gem.driver_private = NULL;
 355         cirrusbo->bo.bdev = &cirrus->ttm.bdev;
 356
 357         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 358
 359         acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
 360                                        sizeof(struct cirrus_bo));
 361
 362         ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
 363                           ttm_bo_type_device, &cirrusbo->placement,
 364                           align >> PAGE_SHIFT, false, NULL, acc_size,
 365                           NULL, cirrus_bo_ttm_destroy);
 366         if (ret)
 367                 return ret;
 368
 369         *pcirrusbo = cirrusbo;
 370         return 0;
 371 }
 372
 373 static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
 374 {
 375         return bo->bo.offset;
 376 }
 377
 378 int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
 379 {
 380         int i, ret;
 381
 382         if (bo->pin_count) {
 383                 bo->pin_count++;
 384                 if (gpu_addr)
 385                         *gpu_addr = cirrus_bo_gpu_offset(bo);
 386         }
 387
 388         cirrus_ttm_placement(bo, pl_flag);
 389         for (i = 0; i < bo->placement.num_placement; i++)
 390                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 391         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 392         if (ret)
 393                 return ret;
 394
 395         bo->pin_count = 1;
 396         if (gpu_addr)
 397                 *gpu_addr = cirrus_bo_gpu_offset(bo);
 398         return 0;
 399 }
 400
 401 int cirrus_bo_unpin(struct cirrus_bo *bo)
 402 {
 403         int i, ret;
 404         if (!bo->pin_count) {
 405                 DRM_ERROR("unpin bad %p\n", bo);
 406                 return 0;
 407         }
 408         bo->pin_count--;
 409         if (bo->pin_count)
 410                 return 0;
 411
 412         for (i = 0; i < bo->placement.num_placement ; i++)
 413                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 414         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 415         if (ret)
 416                 return ret;
 417
 418         return 0;
 419 }
 420
 421 int cirrus_bo_push_sysram(struct cirrus_bo *bo)
 422 {
 423         int i, ret;
 424         if (!bo->pin_count) {
 425                 DRM_ERROR("unpin bad %p\n", bo);
 426                 return 0;
 427         }
 428         bo->pin_count--;
 429         if (bo->pin_count)
 430                 return 0;
 431
 432         if (bo->kmap.virtual)
 433                 ttm_bo_kunmap(&bo->kmap);
 434
 435         cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 436         for (i = 0; i < bo->placement.num_placement ; i++)
 437                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 438
 439         ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
 440         if (ret) {
 441                 DRM_ERROR("pushing to VRAM failed\n");
 442                 return ret;
 443         }
 444         return 0;
 445 }
 446
 447 int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
 448 {
 449         struct drm_file *file_priv;
 450         struct cirrus_device *cirrus;
 451
 452         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 453                 return drm_mmap(filp, vma);
 454
 455         file_priv = filp->private_data;
 456         cirrus = file_priv->minor->dev->dev_private;
 457         return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
 458 }