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 = to_qxl_bo(tbo);
  36         qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
  37
  38         qxl_surface_evict(qdev, bo, false);
  39         mutex_lock(&qdev->gem.mutex);
  40         list_del_init(&bo->list);
  41         mutex_unlock(&qdev->gem.mutex);
  42         drm_gem_object_release(&bo->gem_base);
  43         kfree(bo);
  44 }
  45
  46 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  47 {
  48         if (bo->destroy == &qxl_ttm_bo_destroy)
  49                 return true;
  50         return false;
  51 }
  52
  53 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
  54 {
  55         u32 c = 0;
  56         u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
  57         unsigned int i;
  58
  59         qbo->placement.placement = qbo->placements;
  60         qbo->placement.busy_placement = qbo->placements;
  61         if (domain == QXL_GEM_DOMAIN_VRAM)
  62                 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
  63         if (domain == QXL_GEM_DOMAIN_SURFACE)
  64                 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV | pflag;
  65         if (domain == QXL_GEM_DOMAIN_CPU)
  66                 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag;
  67         if (!c)
  68                 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  69         qbo->placement.num_placement = c;
  70         qbo->placement.num_busy_placement = c;
  71         for (i = 0; i < c; ++i) {
  72                 qbo->placements[i].fpfn = 0;
  73                 qbo->placements[i].lpfn = 0;
  74         }
  75 }
  76
  77 int qxl_bo_create(struct qxl_device *qdev,
  78                   unsigned long size, bool kernel, bool pinned, u32 domain,
  79                   struct qxl_surface *surf,
  80                   struct qxl_bo **bo_ptr)
  81 {
  82         struct qxl_bo *bo;
  83         enum ttm_bo_type type;
  84         int r;
  85
  86         if (kernel)
  87                 type = ttm_bo_type_kernel;
  88         else
  89                 type = ttm_bo_type_device;
  90         *bo_ptr = NULL;
  91         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
  92         if (bo == NULL)
  93                 return -ENOMEM;
  94         size = roundup(size, PAGE_SIZE);
  95         r = drm_gem_object_init(&qdev->ddev, &bo->gem_base, size);
  96         if (unlikely(r)) {
  97                 kfree(bo);
  98                 return r;
  99         }
 100         bo->type = domain;
 101         bo->pin_count = pinned ? 1 : 0;
 102         bo->surface_id = 0;
 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, size,
 112                         NULL, NULL, &qxl_ttm_bo_destroy);
 113         if (unlikely(r != 0)) {
 114                 if (r != -ERESTARTSYS)
 115                         dev_err(qdev->ddev.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_PRIV)
 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
 190         if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) &&
 191             (bo->tbo.mem.mem_type != TTM_PL_PRIV))
 192                 goto fallback;
 193
 194         io_mapping_unmap_atomic(pmap);
 195
 196         (void) ttm_mem_io_lock(man, false);
 197         ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
 198         ttm_mem_io_unlock(man);
 199         return;
 200  fallback:
 201         qxl_bo_kunmap(bo);
 202 }
 203
 204 void qxl_bo_unref(struct qxl_bo **bo)
 205 {
 206         if ((*bo) == NULL)
 207                 return;
 208
 209         drm_gem_object_put_unlocked(&(*bo)->gem_base);
 210         *bo = NULL;
 211 }
 212
 213 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 214 {
 215         drm_gem_object_get(&bo->gem_base);
 216         return bo;
 217 }
 218
 219 static int __qxl_bo_pin(struct qxl_bo *bo)
 220 {
 221         struct ttm_operation_ctx ctx = { false, false };
 222         struct drm_device *ddev = bo->gem_base.dev;
 223         int r;
 224
 225         if (bo->pin_count) {
 226                 bo->pin_count++;
 227                 return 0;
 228         }
 229         qxl_ttm_placement_from_domain(bo, bo->type, true);
 230         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 231         if (likely(r == 0)) {
 232                 bo->pin_count = 1;
 233         }
 234         if (unlikely(r != 0))
 235                 dev_err(ddev->dev, "%p pin failed\n", bo);
 236         return r;
 237 }
 238
 239 static int __qxl_bo_unpin(struct qxl_bo *bo)
 240 {
 241         struct ttm_operation_ctx ctx = { false, false };
 242         struct drm_device *ddev = bo->gem_base.dev;
 243         int r, i;
 244
 245         if (!bo->pin_count) {
 246                 dev_warn(ddev->dev, "%p unpin not necessary\n", bo);
 247                 return 0;
 248         }
 249         bo->pin_count--;
 250         if (bo->pin_count)
 251                 return 0;
 252         for (i = 0; i < bo->placement.num_placement; i++)
 253                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 254         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 255         if (unlikely(r != 0))
 256                 dev_err(ddev->dev, "%p validate failed for unpin\n", bo);
 257         return r;
 258 }
 259
 260 /*
 261  * Reserve the BO before pinning the object.  If the BO was reserved
 262  * beforehand, use the internal version directly __qxl_bo_pin.
 263  *
 264  */
 265 int qxl_bo_pin(struct qxl_bo *bo)
 266 {
 267         int r;
 268
 269         r = qxl_bo_reserve(bo, false);
 270         if (r)
 271                 return r;
 272
 273         r = __qxl_bo_pin(bo);
 274         qxl_bo_unreserve(bo);
 275         return r;
 276 }
 277
 278 /*
 279  * Reserve the BO before pinning the object.  If the BO was reserved
 280  * beforehand, use the internal version directly __qxl_bo_unpin.
 281  *
 282  */
 283 int qxl_bo_unpin(struct qxl_bo *bo)
 284 {
 285         int r;
 286
 287         r = qxl_bo_reserve(bo, false);
 288         if (r)
 289                 return r;
 290
 291         r = __qxl_bo_unpin(bo);
 292         qxl_bo_unreserve(bo);
 293         return r;
 294 }
 295
 296 void qxl_bo_force_delete(struct qxl_device *qdev)
 297 {
 298         struct qxl_bo *bo, *n;
 299
 300         if (list_empty(&qdev->gem.objects))
 301                 return;
 302         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 303         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 304                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 305                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 306                         *((unsigned long *)&bo->gem_base.refcount));
 307                 mutex_lock(&qdev->gem.mutex);
 308                 list_del_init(&bo->list);
 309                 mutex_unlock(&qdev->gem.mutex);
 310                 /* this should unref the ttm bo */
 311                 drm_gem_object_put_unlocked(&bo->gem_base);
 312         }
 313 }
 314
 315 int qxl_bo_init(struct qxl_device *qdev)
 316 {
 317         return qxl_ttm_init(qdev);
 318 }
 319
 320 void qxl_bo_fini(struct qxl_device *qdev)
 321 {
 322         qxl_ttm_fini(qdev);
 323 }
 324
 325 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 326 {
 327         int ret;
 328
 329         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 330                 /* allocate a surface id for this surface now */
 331                 ret = qxl_surface_id_alloc(qdev, bo);
 332                 if (ret)
 333                         return ret;
 334
 335                 ret = qxl_hw_surface_alloc(qdev, bo, NULL);
 336                 if (ret)
 337                         return ret;
 338         }
 339         return 0;
 340 }
 341
 342 int qxl_surf_evict(struct qxl_device *qdev)
 343 {
 344         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 345 }
 346
 347 int qxl_vram_evict(struct qxl_device *qdev)
 348 {
 349         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 350 }