LXR linux/drivers/gpu/drm/cirrus/cirrus

   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
  33static inline struct cirrus_device *
  34cirrus_bdev(struct ttm_bo_device *bd)
  35{
  36        return container_of(bd, struct cirrus_device, ttm.bdev);
  37}
  38
  39static 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
  49static 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
  56static int
  57cirrus_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
  81static void
  82cirrus_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
  93static 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
 101static 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
 130static void cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 131{
 132}
 133
 134static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
 135{
 136        ttm_tt_fini(tt);
 137        kfree(tt);
 138}
 139
 140static struct ttm_backend_func cirrus_tt_backend_func = {
 141        .destroy = &cirrus_ttm_backend_destroy,
 142};
 143
 144
 145static 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
 161struct 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
 172int 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
 204void 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
 219void 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
 239int 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
 275static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
 276{
 277        return bo->bo.offset;
 278}
 279
 280int 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
 304int 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
 331int 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}
 338