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 void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  40 {
  41         struct ast_bo *bo;
  42
  43         bo = container_of(tbo, struct ast_bo, bo);
  44
  45         drm_gem_object_release(&bo->gem);
  46         kfree(bo);
  47 }
  48
  49 static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
  50 {
  51         if (bo->destroy == &ast_bo_ttm_destroy)
  52                 return true;
  53         return false;
  54 }
  55
  56 static int
  57 ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  58                      struct ttm_mem_type_manager *man)
  59 {
  60         switch (type) {
  61         case TTM_PL_SYSTEM:
  62                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
  63                 man->available_caching = TTM_PL_MASK_CACHING;
  64                 man->default_caching = TTM_PL_FLAG_CACHED;
  65                 break;
  66         case TTM_PL_VRAM:
  67                 man->func = &ttm_bo_manager_func;
  68                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
  69                         TTM_MEMTYPE_FLAG_MAPPABLE;
  70                 man->available_caching = TTM_PL_FLAG_UNCACHED |
  71                         TTM_PL_FLAG_WC;
  72                 man->default_caching = TTM_PL_FLAG_WC;
  73                 break;
  74         default:
  75                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
  76                 return -EINVAL;
  77         }
  78         return 0;
  79 }
  80
  81 static void
  82 ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
  83 {
  84         struct ast_bo *astbo = ast_bo(bo);
  85
  86         if (!ast_ttm_bo_is_ast_bo(bo))
  87                 return;
  88
  89         ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
  90         *pl = astbo->placement;
  91 }
  92
  93 static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
  94 {
  95         struct ast_bo *astbo = ast_bo(bo);
  96
  97         return drm_vma_node_verify_access(&astbo->gem.vma_node,
  98                                           filp->private_data);
  99 }
 100
 101 static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 102                                   struct ttm_mem_reg *mem)
 103 {
 104         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 105         struct ast_private *ast = ast_bdev(bdev);
 106
 107         mem->bus.addr = NULL;
 108         mem->bus.offset = 0;
 109         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 110         mem->bus.base = 0;
 111         mem->bus.is_iomem = false;
 112         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 113                 return -EINVAL;
 114         switch (mem->mem_type) {
 115         case TTM_PL_SYSTEM:
 116                 /* system memory */
 117                 return 0;
 118         case TTM_PL_VRAM:
 119                 mem->bus.offset = mem->start << PAGE_SHIFT;
 120                 mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
 121                 mem->bus.is_iomem = true;
 122                 break;
 123         default:
 124                 return -EINVAL;
 125                 break;
 126         }
 127         return 0;
 128 }
 129
 130 static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 131 {
 132 }
 133
 134 static void ast_ttm_backend_destroy(struct ttm_tt *tt)
 135 {
 136         ttm_tt_fini(tt);
 137         kfree(tt);
 138 }
 139
 140 static struct ttm_backend_func ast_tt_backend_func = {
 141         .destroy = &ast_ttm_backend_destroy,
 142 };
 143
 144
 145 static struct ttm_tt *ast_ttm_tt_create(struct ttm_buffer_object *bo,
 146                                         uint32_t page_flags)
 147 {
 148         struct ttm_tt *tt;
 149
 150         tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 151         if (tt == NULL)
 152                 return NULL;
 153         tt->func = &ast_tt_backend_func;
 154         if (ttm_tt_init(tt, bo, page_flags)) {
 155                 kfree(tt);
 156                 return NULL;
 157         }
 158         return tt;
 159 }
 160
 161 struct ttm_bo_driver ast_bo_driver = {
 162         .ttm_tt_create = ast_ttm_tt_create,
 163         .init_mem_type = ast_bo_init_mem_type,
 164         .eviction_valuable = ttm_bo_eviction_valuable,
 165         .evict_flags = ast_bo_evict_flags,
 166         .move = NULL,
 167         .verify_access = ast_bo_verify_access,
 168         .io_mem_reserve = &ast_ttm_io_mem_reserve,
 169         .io_mem_free = &ast_ttm_io_mem_free,
 170 };
 171
 172 int ast_mm_init(struct ast_private *ast)
 173 {
 174         int ret;
 175         struct drm_device *dev = ast->dev;
 176         struct ttm_bo_device *bdev = &ast->ttm.bdev;
 177
 178         ret = ttm_bo_device_init(&ast->ttm.bdev,
 179                                  &ast_bo_driver,
 180                                  dev->anon_inode->i_mapping,
 181                                  DRM_FILE_PAGE_OFFSET,
 182                                  true);
 183         if (ret) {
 184                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 185                 return ret;
 186         }
 187
 188         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
 189                              ast->vram_size >> PAGE_SHIFT);
 190         if (ret) {
 191                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 192                 return ret;
 193         }
 194
 195         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
 196                                    pci_resource_len(dev->pdev, 0));
 197         ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
 198                                         pci_resource_len(dev->pdev, 0));
 199
 200         return 0;
 201 }
 202
 203 void ast_mm_fini(struct ast_private *ast)
 204 {
 205         struct drm_device *dev = ast->dev;
 206
 207         ttm_bo_device_release(&ast->ttm.bdev);
 208
 209         arch_phys_wc_del(ast->fb_mtrr);
 210         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
 211                                 pci_resource_len(dev->pdev, 0));
 212 }
 213
 214 void ast_ttm_placement(struct ast_bo *bo, int domain)
 215 {
 216         u32 c = 0;
 217         unsigned i;
 218
 219         bo->placement.placement = bo->placements;
 220         bo->placement.busy_placement = bo->placements;
 221         if (domain & TTM_PL_FLAG_VRAM)
 222                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 223         if (domain & TTM_PL_FLAG_SYSTEM)
 224                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 225         if (!c)
 226                 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 227         bo->placement.num_placement = c;
 228         bo->placement.num_busy_placement = c;
 229         for (i = 0; i < c; ++i) {
 230                 bo->placements[i].fpfn = 0;
 231                 bo->placements[i].lpfn = 0;
 232         }
 233 }
 234
 235 int ast_bo_create(struct drm_device *dev, int size, int align,
 236                   uint32_t flags, struct ast_bo **pastbo)
 237 {
 238         struct ast_private *ast = dev->dev_private;
 239         struct ast_bo *astbo;
 240         size_t acc_size;
 241         int ret;
 242
 243         astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
 244         if (!astbo)
 245                 return -ENOMEM;
 246
 247         ret = drm_gem_object_init(dev, &astbo->gem, size);
 248         if (ret)
 249                 goto error;
 250
 251         astbo->bo.bdev = &ast->ttm.bdev;
 252
 253         ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 254
 255         acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
 256                                        sizeof(struct ast_bo));
 257
 258         ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
 259                           ttm_bo_type_device, &astbo->placement,
 260                           align >> PAGE_SHIFT, false, acc_size,
 261                           NULL, NULL, ast_bo_ttm_destroy);
 262         if (ret)
 263                 goto error;
 264
 265         *pastbo = astbo;
 266         return 0;
 267 error:
 268         kfree(astbo);
 269         return ret;
 270 }
 271
 272 static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
 273 {
 274         return bo->bo.offset;
 275 }
 276
 277 int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
 278 {
 279         struct ttm_operation_ctx ctx = { false, false };
 280         int i, ret;
 281
 282         if (bo->pin_count) {
 283                 bo->pin_count++;
 284                 if (gpu_addr)
 285                         *gpu_addr = ast_bo_gpu_offset(bo);
 286         }
 287
 288         ast_ttm_placement(bo, pl_flag);
 289         for (i = 0; i < bo->placement.num_placement; i++)
 290                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 291         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 292         if (ret)
 293                 return ret;
 294
 295         bo->pin_count = 1;
 296         if (gpu_addr)
 297                 *gpu_addr = ast_bo_gpu_offset(bo);
 298         return 0;
 299 }
 300
 301 int ast_bo_unpin(struct ast_bo *bo)
 302 {
 303         struct ttm_operation_ctx ctx = { false, false };
 304         int i;
 305         if (!bo->pin_count) {
 306                 DRM_ERROR("unpin bad %p\n", bo);
 307                 return 0;
 308         }
 309         bo->pin_count--;
 310         if (bo->pin_count)
 311                 return 0;
 312
 313         for (i = 0; i < bo->placement.num_placement ; i++)
 314                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 315         return ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 316 }
 317
 318 int ast_bo_push_sysram(struct ast_bo *bo)
 319 {
 320         struct ttm_operation_ctx ctx = { false, false };
 321         int i, ret;
 322         if (!bo->pin_count) {
 323                 DRM_ERROR("unpin bad %p\n", bo);
 324                 return 0;
 325         }
 326         bo->pin_count--;
 327         if (bo->pin_count)
 328                 return 0;
 329
 330         if (bo->kmap.virtual)
 331                 ttm_bo_kunmap(&bo->kmap);
 332
 333         ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 334         for (i = 0; i < bo->placement.num_placement ; i++)
 335                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 336
 337         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 338         if (ret) {
 339                 DRM_ERROR("pushing to VRAM failed\n");
 340                 return ret;
 341         }
 342         return 0;
 343 }
 344
 345 int ast_mmap(struct file *filp, struct vm_area_struct *vma)
 346 {
 347         struct drm_file *file_priv;
 348         struct ast_private *ast;
 349
 350         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
 351                 return -EINVAL;
 352
 353         file_priv = filp->private_data;
 354         ast = file_priv->minor->dev->dev_private;
 355         return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
 356 }