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 <drm/ttm/ttm_page_alloc.h>
  30
  31 #include "cirrus_drv.h"
  32
  33 static inline struct cirrus_device *
  34 cirrus_bdev(struct ttm_bo_device *bd)
  35 {
  36         return container_of(bd, struct cirrus_device, ttm.bdev);
  37 }
  38
  39 static int
  40 cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
  41 {
  42         return ttm_mem_global_init(ref->object);
  43 }
  44
  45 static void
  46 cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
  47 {
  48         ttm_mem_global_release(ref->object);
  49 }
  50
  51 static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
  52 {
  53         struct drm_global_reference *global_ref;
  54         int r;
  55
  56         global_ref = &cirrus->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 = &cirrus_ttm_mem_global_init;
  60         global_ref->release = &cirrus_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         cirrus->ttm.bo_global_ref.mem_glob =
  69                 cirrus->ttm.mem_global_ref.object;
  70         global_ref = &cirrus->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(&cirrus->ttm.mem_global_ref);
  79                 return r;
  80         }
  81         return 0;
  82 }
  83
  84 static void
  85 cirrus_ttm_global_release(struct cirrus_device *cirrus)
  86 {
  87         if (cirrus->ttm.mem_global_ref.release == NULL)
  88                 return;
  89
  90         drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
  91         drm_global_item_unref(&cirrus->ttm.mem_global_ref);
  92         cirrus->ttm.mem_global_ref.release = NULL;
  93 }
  94
  95
  96 static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  97 {
  98         struct cirrus_bo *bo;
  99
 100         bo = container_of(tbo, struct cirrus_bo, bo);
 101
 102         drm_gem_object_release(&bo->gem);
 103         kfree(bo);
 104 }
 105
 106 static bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
 107 {
 108         if (bo->destroy == &cirrus_bo_ttm_destroy)
 109                 return true;
 110         return false;
 111 }
 112
 113 static int
 114 cirrus_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 cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 140 {
 141         struct cirrus_bo *cirrusbo = cirrus_bo(bo);
 142
 143         if (!cirrus_ttm_bo_is_cirrus_bo(bo))
 144                 return;
 145
 146         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
 147         *pl = cirrusbo->placement;
 148 }
 149
 150 static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 151 {
 152         struct cirrus_bo *cirrusbo = cirrus_bo(bo);
 153
 154         return drm_vma_node_verify_access(&cirrusbo->gem.vma_node,
 155                                           filp->private_data);
 156 }
 157
 158 static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->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 cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 188 {
 189 }
 190
 191 static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
 192 {
 193         ttm_tt_fini(tt);
 194         kfree(tt);
 195 }
 196
 197 static struct ttm_backend_func cirrus_tt_backend_func = {
 198         .destroy = &cirrus_ttm_backend_destroy,
 199 };
 200
 201
 202 static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_buffer_object *bo,
 203                                            uint32_t page_flags)
 204 {
 205         struct ttm_tt *tt;
 206
 207         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 208         if (tt == NULL)
 209                 return NULL;
 210         tt->func = &cirrus_tt_backend_func;
 211         if (ttm_tt_init(tt, bo, page_flags)) {
 212                 kfree(tt);
 213                 return NULL;
 214         }
 215         return tt;
 216 }
 217
 218 struct ttm_bo_driver cirrus_bo_driver = {
 219         .ttm_tt_create = cirrus_ttm_tt_create,
 220         .init_mem_type = cirrus_bo_init_mem_type,
 221         .eviction_valuable = ttm_bo_eviction_valuable,
 222         .evict_flags = cirrus_bo_evict_flags,
 223         .move = NULL,
 224         .verify_access = cirrus_bo_verify_access,
 225         .io_mem_reserve = &cirrus_ttm_io_mem_reserve,
 226         .io_mem_free = &cirrus_ttm_io_mem_free,
 227 };
 228
 229 int cirrus_mm_init(struct cirrus_device *cirrus)
 230 {
 231         int ret;
 232         struct drm_device *dev = cirrus->dev;
 233         struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
 234
 235         ret = cirrus_ttm_global_init(cirrus);
 236         if (ret)
 237                 return ret;
 238
 239         ret = ttm_bo_device_init(&cirrus->ttm.bdev,
 240                                  cirrus->ttm.bo_global_ref.ref.object,
 241                                  &cirrus_bo_driver,
 242                                  dev->anon_inode->i_mapping,
 243                                  DRM_FILE_PAGE_OFFSET,
 244                                  true);
 245         if (ret) {
 246                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 247                 return ret;
 248         }
 249
 250         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
 251                              cirrus->mc.vram_size >> PAGE_SHIFT);
 252         if (ret) {
 253                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 254                 return ret;
 255         }
 256
 257         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
 258                                    pci_resource_len(dev->pdev, 0));
 259
 260         cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
 261                                            pci_resource_len(dev->pdev, 0));
 262
 263         cirrus->mm_inited = true;
 264         return 0;
 265 }
 266
 267 void cirrus_mm_fini(struct cirrus_device *cirrus)
 268 {
 269         struct drm_device *dev = cirrus->dev;
 270
 271         if (!cirrus->mm_inited)
 272                 return;
 273
 274         ttm_bo_device_release(&cirrus->ttm.bdev);
 275
 276         cirrus_ttm_global_release(cirrus);
 277
 278         arch_phys_wc_del(cirrus->fb_mtrr);
 279         cirrus->fb_mtrr = 0;
 280         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
 281                                 pci_resource_len(dev->pdev, 0));
 282 }
 283
 284 void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
 285 {
 286         u32 c = 0;
 287         unsigned i;
 288         bo->placement.placement = bo->placements;
 289         bo->placement.busy_placement = bo->placements;
 290         if (domain & TTM_PL_FLAG_VRAM)
 291                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 292         if (domain & TTM_PL_FLAG_SYSTEM)
 293                 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 294         if (!c)
 295                 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 296         bo->placement.num_placement = c;
 297         bo->placement.num_busy_placement = c;
 298         for (i = 0; i < c; ++i) {
 299                 bo->placements[i].fpfn = 0;
 300                 bo->placements[i].lpfn = 0;
 301         }
 302 }
 303
 304 int cirrus_bo_create(struct drm_device *dev, int size, int align,
 305                   uint32_t flags, struct cirrus_bo **pcirrusbo)
 306 {
 307         struct cirrus_device *cirrus = dev->dev_private;
 308         struct cirrus_bo *cirrusbo;
 309         size_t acc_size;
 310         int ret;
 311
 312         cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
 313         if (!cirrusbo)
 314                 return -ENOMEM;
 315
 316         ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
 317         if (ret) {
 318                 kfree(cirrusbo);
 319                 return ret;
 320         }
 321
 322         cirrusbo->bo.bdev = &cirrus->ttm.bdev;
 323
 324         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 325
 326         acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
 327                                        sizeof(struct cirrus_bo));
 328
 329         ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
 330                           ttm_bo_type_device, &cirrusbo->placement,
 331                           align >> PAGE_SHIFT, false, acc_size,
 332                           NULL, NULL, cirrus_bo_ttm_destroy);
 333         if (ret)
 334                 return ret;
 335
 336         *pcirrusbo = cirrusbo;
 337         return 0;
 338 }
 339
 340 static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
 341 {
 342         return bo->bo.offset;
 343 }
 344
 345 int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
 346 {
 347         struct ttm_operation_ctx ctx = { false, false };
 348         int i, ret;
 349
 350         if (bo->pin_count) {
 351                 bo->pin_count++;
 352                 if (gpu_addr)
 353                         *gpu_addr = cirrus_bo_gpu_offset(bo);
 354         }
 355
 356         cirrus_ttm_placement(bo, pl_flag);
 357         for (i = 0; i < bo->placement.num_placement; i++)
 358                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 359         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 360         if (ret)
 361                 return ret;
 362
 363         bo->pin_count = 1;
 364         if (gpu_addr)
 365                 *gpu_addr = cirrus_bo_gpu_offset(bo);
 366         return 0;
 367 }
 368
 369 int cirrus_bo_push_sysram(struct cirrus_bo *bo)
 370 {
 371         struct ttm_operation_ctx ctx = { false, false };
 372         int i, ret;
 373         if (!bo->pin_count) {
 374                 DRM_ERROR("unpin bad %p\n", bo);
 375                 return 0;
 376         }
 377         bo->pin_count--;
 378         if (bo->pin_count)
 379                 return 0;
 380
 381         if (bo->kmap.virtual)
 382                 ttm_bo_kunmap(&bo->kmap);
 383
 384         cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 385         for (i = 0; i < bo->placement.num_placement ; i++)
 386                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 387
 388         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 389         if (ret) {
 390                 DRM_ERROR("pushing to VRAM failed\n");
 391                 return ret;
 392         }
 393         return 0;
 394 }
 395
 396 int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
 397 {
 398         struct drm_file *file_priv;
 399         struct cirrus_device *cirrus;
 400
 401         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 402                 return -EINVAL;
 403
 404         file_priv = filp->private_data;
 405         cirrus = file_priv->minor->dev->dev_private;
 406         return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
 407 }