drivers/gpu/drm/qxl/qxl_object.c

   1 /*
   2  * Copyright 2013 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 "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Dave Airlie
  23  *          Alon Levy
  24  */
  25
  26 #include "qxl_drv.h"
  27 #include "qxl_object.h"
  28
  29 #include <linux/io-mapping.h>
  30 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  31 {
  32         struct qxl_bo *bo;
  33         struct qxl_device *qdev;
  34
  35         bo = container_of(tbo, struct qxl_bo, tbo);
  36         qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
  37
  38         qxl_surface_evict(qdev, bo, false);
  39         qxl_fence_fini(&bo->fence);
  40         mutex_lock(&qdev->gem.mutex);
  41         list_del_init(&bo->list);
  42         mutex_unlock(&qdev->gem.mutex);
  43         drm_gem_object_release(&bo->gem_base);
  44         kfree(bo);
  45 }
  46
  47 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  48 {
  49         if (bo->destroy == &qxl_ttm_bo_destroy)
  50                 return true;
  51         return false;
  52 }
  53
  54 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
  55 {
  56         u32 c = 0;
  57         u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
  58
  59         qbo->placement.fpfn = 0;
  60         qbo->placement.lpfn = 0;
  61         qbo->placement.placement = qbo->placements;
  62         qbo->placement.busy_placement = qbo->placements;
  63         if (domain == QXL_GEM_DOMAIN_VRAM)
  64                 qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
  65         if (domain == QXL_GEM_DOMAIN_SURFACE)
  66                 qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0 | pflag;
  67         if (domain == QXL_GEM_DOMAIN_CPU)
  68                 qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag;
  69         if (!c)
  70                 qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  71         qbo->placement.num_placement = c;
  72         qbo->placement.num_busy_placement = c;
  73 }
  74
  75
  76 int qxl_bo_create(struct qxl_device *qdev,
  77                   unsigned long size, bool kernel, bool pinned, u32 domain,
  78                   struct qxl_surface *surf,
  79                   struct qxl_bo **bo_ptr)
  80 {
  81         struct qxl_bo *bo;
  82         enum ttm_bo_type type;
  83         int r;
  84
  85         if (kernel)
  86                 type = ttm_bo_type_kernel;
  87         else
  88                 type = ttm_bo_type_device;
  89         *bo_ptr = NULL;
  90         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
  91         if (bo == NULL)
  92                 return -ENOMEM;
  93         size = roundup(size, PAGE_SIZE);
  94         r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size);
  95         if (unlikely(r)) {
  96                 kfree(bo);
  97                 return r;
  98         }
  99         bo->type = domain;
 100         bo->pin_count = pinned ? 1 : 0;
 101         bo->surface_id = 0;
 102         qxl_fence_init(qdev, &bo->fence);
 103         INIT_LIST_HEAD(&bo->list);
 104
 105         if (surf)
 106                 bo->surf = *surf;
 107
 108         qxl_ttm_placement_from_domain(bo, domain, pinned);
 109
 110         r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
 111                         &bo->placement, 0, !kernel, NULL, size,
 112                         NULL, &qxl_ttm_bo_destroy);
 113         if (unlikely(r != 0)) {
 114                 if (r != -ERESTARTSYS)
 115                         dev_err(qdev->dev,
 116                                 "object_init failed for (%lu, 0x%08X)\n",
 117                                 size, domain);
 118                 return r;
 119         }
 120         *bo_ptr = bo;
 121         return 0;
 122 }
 123
 124 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
 125 {
 126         bool is_iomem;
 127         int r;
 128
 129         if (bo->kptr) {
 130                 if (ptr)
 131                         *ptr = bo->kptr;
 132                 return 0;
 133         }
 134         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 135         if (r)
 136                 return r;
 137         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 138         if (ptr)
 139                 *ptr = bo->kptr;
 140         return 0;
 141 }
 142
 143 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 144                               struct qxl_bo *bo, int page_offset)
 145 {
 146         struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 147         void *rptr;
 148         int ret;
 149         struct io_mapping *map;
 150
 151         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 152                 map = qdev->vram_mapping;
 153         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 154                 map = qdev->surface_mapping;
 155         else
 156                 goto fallback;
 157
 158         (void) ttm_mem_io_lock(man, false);
 159         ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
 160         ttm_mem_io_unlock(man);
 161
 162         return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
 163 fallback:
 164         if (bo->kptr) {
 165                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 166                 return rptr;
 167         }
 168
 169         ret = qxl_bo_kmap(bo, &rptr);
 170         if (ret)
 171                 return NULL;
 172
 173         rptr += page_offset * PAGE_SIZE;
 174         return rptr;
 175 }
 176
 177 void qxl_bo_kunmap(struct qxl_bo *bo)
 178 {
 179         if (bo->kptr == NULL)
 180                 return;
 181         bo->kptr = NULL;
 182         ttm_bo_kunmap(&bo->kmap);
 183 }
 184
 185 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 186                                struct qxl_bo *bo, void *pmap)
 187 {
 188         struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 189         struct io_mapping *map;
 190
 191         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 192                 map = qdev->vram_mapping;
 193         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 194                 map = qdev->surface_mapping;
 195         else
 196                 goto fallback;
 197
 198         io_mapping_unmap_atomic(pmap);
 199
 200         (void) ttm_mem_io_lock(man, false);
 201         ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
 202         ttm_mem_io_unlock(man);
 203         return ;
 204  fallback:
 205         qxl_bo_kunmap(bo);
 206 }
 207
 208 void qxl_bo_unref(struct qxl_bo **bo)
 209 {
 210         struct ttm_buffer_object *tbo;
 211
 212         if ((*bo) == NULL)
 213                 return;
 214         tbo = &((*bo)->tbo);
 215         ttm_bo_unref(&tbo);
 216         if (tbo == NULL)
 217                 *bo = NULL;
 218 }
 219
 220 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 221 {
 222         ttm_bo_reference(&bo->tbo);
 223         return bo;
 224 }
 225
 226 int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
 227 {
 228         struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 229         int r;
 230
 231         if (bo->pin_count) {
 232                 bo->pin_count++;
 233                 if (gpu_addr)
 234                         *gpu_addr = qxl_bo_gpu_offset(bo);
 235                 return 0;
 236         }
 237         qxl_ttm_placement_from_domain(bo, domain, true);
 238         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 239         if (likely(r == 0)) {
 240                 bo->pin_count = 1;
 241                 if (gpu_addr != NULL)
 242                         *gpu_addr = qxl_bo_gpu_offset(bo);
 243         }
 244         if (unlikely(r != 0))
 245                 dev_err(qdev->dev, "%p pin failed\n", bo);
 246         return r;
 247 }
 248
 249 int qxl_bo_unpin(struct qxl_bo *bo)
 250 {
 251         struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 252         int r, i;
 253
 254         if (!bo->pin_count) {
 255                 dev_warn(qdev->dev, "%p unpin not necessary\n", bo);
 256                 return 0;
 257         }
 258         bo->pin_count--;
 259         if (bo->pin_count)
 260                 return 0;
 261         for (i = 0; i < bo->placement.num_placement; i++)
 262                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 263         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 264         if (unlikely(r != 0))
 265                 dev_err(qdev->dev, "%p validate failed for unpin\n", bo);
 266         return r;
 267 }
 268
 269 void qxl_bo_force_delete(struct qxl_device *qdev)
 270 {
 271         struct qxl_bo *bo, *n;
 272
 273         if (list_empty(&qdev->gem.objects))
 274                 return;
 275         dev_err(qdev->dev, "Userspace still has active objects !\n");
 276         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 277                 mutex_lock(&qdev->ddev->struct_mutex);
 278                 dev_err(qdev->dev, "%p %p %lu %lu force free\n",
 279                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 280                         *((unsigned long *)&bo->gem_base.refcount));
 281                 mutex_lock(&qdev->gem.mutex);
 282                 list_del_init(&bo->list);
 283                 mutex_unlock(&qdev->gem.mutex);
 284                 /* this should unref the ttm bo */
 285                 drm_gem_object_unreference(&bo->gem_base);
 286                 mutex_unlock(&qdev->ddev->struct_mutex);
 287         }
 288 }
 289
 290 int qxl_bo_init(struct qxl_device *qdev)
 291 {
 292         return qxl_ttm_init(qdev);
 293 }
 294
 295 void qxl_bo_fini(struct qxl_device *qdev)
 296 {
 297         qxl_ttm_fini(qdev);
 298 }
 299
 300 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 301 {
 302         int ret;
 303         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 304                 /* allocate a surface id for this surface now */
 305                 ret = qxl_surface_id_alloc(qdev, bo);
 306                 if (ret)
 307                         return ret;
 308
 309                 ret = qxl_hw_surface_alloc(qdev, bo, NULL);
 310                 if (ret)
 311                         return ret;
 312         }
 313         return 0;
 314 }
 315
 316 int qxl_surf_evict(struct qxl_device *qdev)
 317 {
 318         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
 319 }
 320
 321 int qxl_vram_evict(struct qxl_device *qdev)
 322 {
 323         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 324 }