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 void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
  40 {
  41         struct cirrus_bo *bo;
  42
  43         bo = container_of(tbo, struct cirrus_bo, bo);
  44
  45         drm_gem_object_release(&bo->gem);
  46         kfree(bo);
  47 }
  48
  49 static bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
  50 {
  51         if (bo->destroy == &cirrus_bo_ttm_destroy)
  52                 return true;
  53         return false;
  54 }
  55
  56 static int
  57 cirrus_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 cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
  83 {
  84         struct cirrus_bo *cirrusbo = cirrus_bo(bo);
  85
  86         if (!cirrus_ttm_bo_is_cirrus_bo(bo))
  87                 return;
  88
  89         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
  90         *pl = cirrusbo->placement;
  91 }
  92
  93 static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
  94 {
  95         struct cirrus_bo *cirrusbo = cirrus_bo(bo);
  96
  97         return drm_vma_node_verify_access(&cirrusbo->gem.vma_node,
  98                                           filp->private_data);
  99 }
 100
 101 static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->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 cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 131 {
 132 }
 133
 134 static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
 135 {
 136         ttm_tt_fini(tt);
 137         kfree(tt);
 138 }
 139
 140 static struct ttm_backend_func cirrus_tt_backend_func = {
 141         .destroy = &cirrus_ttm_backend_destroy,
 142 };
 143
 144
 145 static struct ttm_tt *cirrus_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 = &cirrus_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 cirrus_bo_driver = {
 162         .ttm_tt_create = cirrus_ttm_tt_create,
 163         .init_mem_type = cirrus_bo_init_mem_type,
 164         .eviction_valuable = ttm_bo_eviction_valuable,
 165         .evict_flags = cirrus_bo_evict_flags,
 166         .move = NULL,
 167         .verify_access = cirrus_bo_verify_access,
 168         .io_mem_reserve = &cirrus_ttm_io_mem_reserve,
 169         .io_mem_free = &cirrus_ttm_io_mem_free,
 170 };
 171
 172 int cirrus_mm_init(struct cirrus_device *cirrus)
 173 {
 174         int ret;
 175         struct drm_device *dev = cirrus->dev;
 176         struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
 177
 178         ret = ttm_bo_device_init(&cirrus->ttm.bdev,
 179                                  &cirrus_bo_driver,
 180                                  dev->anon_inode->i_mapping,
 181                                  true);
 182         if (ret) {
 183                 DRM_ERROR("Error initialising bo driver; %d\n", ret);
 184                 return ret;
 185         }
 186
 187         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
 188                              cirrus->mc.vram_size >> PAGE_SHIFT);
 189         if (ret) {
 190                 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
 191                 return ret;
 192         }
 193
 194         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
 195                                    pci_resource_len(dev->pdev, 0));
 196
 197         cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
 198                                            pci_resource_len(dev->pdev, 0));
 199
 200         cirrus->mm_inited = true;
 201         return 0;
 202 }
 203
 204 void cirrus_mm_fini(struct cirrus_device *cirrus)
 205 {
 206         struct drm_device *dev = cirrus->dev;
 207
 208         if (!cirrus->mm_inited)
 209                 return;
 210
 211         ttm_bo_device_release(&cirrus->ttm.bdev);
 212
 213         arch_phys_wc_del(cirrus->fb_mtrr);
 214         cirrus->fb_mtrr = 0;
 215         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
 216                                 pci_resource_len(dev->pdev, 0));
 217 }
 218
 219 void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
 220 {
 221         u32 c = 0;
 222         unsigned i;
 223         bo->placement.placement = bo->placements;
 224         bo->placement.busy_placement = bo->placements;
 225         if (domain & TTM_PL_FLAG_VRAM)
 226                 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
 227         if (domain & TTM_PL_FLAG_SYSTEM)
 228                 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 229         if (!c)
 230                 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 231         bo->placement.num_placement = c;
 232         bo->placement.num_busy_placement = c;
 233         for (i = 0; i < c; ++i) {
 234                 bo->placements[i].fpfn = 0;
 235                 bo->placements[i].lpfn = 0;
 236         }
 237 }
 238
 239 int cirrus_bo_create(struct drm_device *dev, int size, int align,
 240                   uint32_t flags, struct cirrus_bo **pcirrusbo)
 241 {
 242         struct cirrus_device *cirrus = dev->dev_private;
 243         struct cirrus_bo *cirrusbo;
 244         size_t acc_size;
 245         int ret;
 246
 247         cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
 248         if (!cirrusbo)
 249                 return -ENOMEM;
 250
 251         ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
 252         if (ret) {
 253                 kfree(cirrusbo);
 254                 return ret;
 255         }
 256
 257         cirrusbo->bo.bdev = &cirrus->ttm.bdev;
 258
 259         cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
 260
 261         acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
 262                                        sizeof(struct cirrus_bo));
 263
 264         ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
 265                           ttm_bo_type_device, &cirrusbo->placement,
 266                           align >> PAGE_SHIFT, false, acc_size,
 267                           NULL, NULL, cirrus_bo_ttm_destroy);
 268         if (ret)
 269                 return ret;
 270
 271         *pcirrusbo = cirrusbo;
 272         return 0;
 273 }
 274
 275 static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
 276 {
 277         return bo->bo.offset;
 278 }
 279
 280 int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
 281 {
 282         struct ttm_operation_ctx ctx = { false, false };
 283         int i, ret;
 284
 285         if (bo->pin_count) {
 286                 bo->pin_count++;
 287                 if (gpu_addr)
 288                         *gpu_addr = cirrus_bo_gpu_offset(bo);
 289         }
 290
 291         cirrus_ttm_placement(bo, pl_flag);
 292         for (i = 0; i < bo->placement.num_placement; i++)
 293                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 294         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 295         if (ret)
 296                 return ret;
 297
 298         bo->pin_count = 1;
 299         if (gpu_addr)
 300                 *gpu_addr = cirrus_bo_gpu_offset(bo);
 301         return 0;
 302 }
 303
 304 int cirrus_bo_push_sysram(struct cirrus_bo *bo)
 305 {
 306         struct ttm_operation_ctx ctx = { false, false };
 307         int i, ret;
 308         if (!bo->pin_count) {
 309                 DRM_ERROR("unpin bad %p\n", bo);
 310                 return 0;
 311         }
 312         bo->pin_count--;
 313         if (bo->pin_count)
 314                 return 0;
 315
 316         if (bo->kmap.virtual)
 317                 ttm_bo_kunmap(&bo->kmap);
 318
 319         cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
 320         for (i = 0; i < bo->placement.num_placement ; i++)
 321                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 322
 323         ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
 324         if (ret) {
 325                 DRM_ERROR("pushing to VRAM failed\n");
 326                 return ret;
 327         }
 328         return 0;
 329 }
 330
 331 int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
 332 {
 333         struct drm_file *file_priv = filp->private_data;
 334         struct cirrus_device *cirrus = file_priv->minor->dev->dev_private;
 335
 336         return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
 337 }