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 <linux/iosys-map.h>
  27 #include <linux/io-mapping.h>
  28
  29 #include "qxl_drv.h"
  30 #include "qxl_object.h"
  31
  32 static int __qxl_bo_pin(struct qxl_bo *bo);
  33 static void __qxl_bo_unpin(struct qxl_bo *bo);
  34
  35 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  36 {
  37         struct qxl_bo *bo;
  38         struct qxl_device *qdev;
  39
  40         bo = to_qxl_bo(tbo);
  41         qdev = to_qxl(bo->tbo.base.dev);
  42
  43         qxl_surface_evict(qdev, bo, false);
  44         WARN_ON_ONCE(bo->map_count > 0);
  45         mutex_lock(&qdev->gem.mutex);
  46         list_del_init(&bo->list);
  47         mutex_unlock(&qdev->gem.mutex);
  48         drm_gem_object_release(&bo->tbo.base);
  49         kfree(bo);
  50 }
  51
  52 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  53 {
  54         if (bo->destroy == &qxl_ttm_bo_destroy)
  55                 return true;
  56         return false;
  57 }
  58
  59 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
  60 {
  61         u32 c = 0;
  62         u32 pflag = 0;
  63         unsigned int i;
  64
  65         if (qbo->tbo.base.size <= PAGE_SIZE)
  66                 pflag |= TTM_PL_FLAG_TOPDOWN;
  67
  68         qbo->placement.placement = qbo->placements;
  69         qbo->placement.busy_placement = qbo->placements;
  70         if (domain == QXL_GEM_DOMAIN_VRAM) {
  71                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  72                 qbo->placements[c++].flags = pflag;
  73         }
  74         if (domain == QXL_GEM_DOMAIN_SURFACE) {
  75                 qbo->placements[c].mem_type = TTM_PL_PRIV;
  76                 qbo->placements[c++].flags = pflag;
  77                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  78                 qbo->placements[c++].flags = pflag;
  79         }
  80         if (domain == QXL_GEM_DOMAIN_CPU) {
  81                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  82                 qbo->placements[c++].flags = pflag;
  83         }
  84         if (!c) {
  85                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  86                 qbo->placements[c++].flags = 0;
  87         }
  88         qbo->placement.num_placement = c;
  89         qbo->placement.num_busy_placement = c;
  90         for (i = 0; i < c; ++i) {
  91                 qbo->placements[i].fpfn = 0;
  92                 qbo->placements[i].lpfn = 0;
  93         }
  94 }
  95
  96 static const struct drm_gem_object_funcs qxl_object_funcs = {
  97         .free = qxl_gem_object_free,
  98         .open = qxl_gem_object_open,
  99         .close = qxl_gem_object_close,
 100         .pin = qxl_gem_prime_pin,
 101         .unpin = qxl_gem_prime_unpin,
 102         .get_sg_table = qxl_gem_prime_get_sg_table,
 103         .vmap = qxl_gem_prime_vmap,
 104         .vunmap = qxl_gem_prime_vunmap,
 105         .mmap = drm_gem_ttm_mmap,
 106         .print_info = drm_gem_ttm_print_info,
 107 };
 108
 109 int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
 110                   bool kernel, bool pinned, u32 domain, u32 priority,
 111                   struct qxl_surface *surf,
 112                   struct qxl_bo **bo_ptr)
 113 {
 114         struct ttm_operation_ctx ctx = { !kernel, false };
 115         struct qxl_bo *bo;
 116         enum ttm_bo_type type;
 117         int r;
 118
 119         if (kernel)
 120                 type = ttm_bo_type_kernel;
 121         else
 122                 type = ttm_bo_type_device;
 123         *bo_ptr = NULL;
 124         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
 125         if (bo == NULL)
 126                 return -ENOMEM;
 127         size = roundup(size, PAGE_SIZE);
 128         r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
 129         if (unlikely(r)) {
 130                 kfree(bo);
 131                 return r;
 132         }
 133         bo->tbo.base.funcs = &qxl_object_funcs;
 134         bo->type = domain;
 135         bo->surface_id = 0;
 136         INIT_LIST_HEAD(&bo->list);
 137
 138         if (surf)
 139                 bo->surf = *surf;
 140
 141         qxl_ttm_placement_from_domain(bo, domain);
 142
 143         bo->tbo.priority = priority;
 144         r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, type,
 145                                  &bo->placement, 0, &ctx, NULL, NULL,
 146                                  &qxl_ttm_bo_destroy);
 147         if (unlikely(r != 0)) {
 148                 if (r != -ERESTARTSYS)
 149                         dev_err(qdev->ddev.dev,
 150                                 "object_init failed for (%lu, 0x%08X)\n",
 151                                 size, domain);
 152                 return r;
 153         }
 154         if (pinned)
 155                 ttm_bo_pin(&bo->tbo);
 156         ttm_bo_unreserve(&bo->tbo);
 157         *bo_ptr = bo;
 158         return 0;
 159 }
 160
 161 int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map)
 162 {
 163         int r;
 164
 165         dma_resv_assert_held(bo->tbo.base.resv);
 166
 167         if (bo->kptr) {
 168                 bo->map_count++;
 169                 goto out;
 170         }
 171
 172         r = __qxl_bo_pin(bo);
 173         if (r)
 174                 return r;
 175
 176         r = ttm_bo_vmap(&bo->tbo, &bo->map);
 177         if (r) {
 178                 __qxl_bo_unpin(bo);
 179                 return r;
 180         }
 181         bo->map_count = 1;
 182
 183         /* TODO: Remove kptr in favor of map everywhere. */
 184         if (bo->map.is_iomem)
 185                 bo->kptr = (void *)bo->map.vaddr_iomem;
 186         else
 187                 bo->kptr = bo->map.vaddr;
 188
 189 out:
 190         *map = bo->map;
 191         return 0;
 192 }
 193
 194 int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map)
 195 {
 196         int r;
 197
 198         r = qxl_bo_reserve(bo);
 199         if (r)
 200                 return r;
 201
 202         r = qxl_bo_vmap_locked(bo, map);
 203         qxl_bo_unreserve(bo);
 204         return r;
 205 }
 206
 207 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 208                               struct qxl_bo *bo, int page_offset)
 209 {
 210         unsigned long offset;
 211         void *rptr;
 212         int ret;
 213         struct io_mapping *map;
 214         struct iosys_map bo_map;
 215
 216         if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
 217                 map = qdev->vram_mapping;
 218         else if (bo->tbo.resource->mem_type == TTM_PL_PRIV)
 219                 map = qdev->surface_mapping;
 220         else
 221                 goto fallback;
 222
 223         offset = bo->tbo.resource->start << PAGE_SHIFT;
 224         return io_mapping_map_atomic_wc(map, offset + page_offset);
 225 fallback:
 226         if (bo->kptr) {
 227                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 228                 return rptr;
 229         }
 230
 231         ret = qxl_bo_vmap_locked(bo, &bo_map);
 232         if (ret)
 233                 return NULL;
 234         rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
 235
 236         rptr += page_offset * PAGE_SIZE;
 237         return rptr;
 238 }
 239
 240 void qxl_bo_vunmap_locked(struct qxl_bo *bo)
 241 {
 242         dma_resv_assert_held(bo->tbo.base.resv);
 243
 244         if (bo->kptr == NULL)
 245                 return;
 246         bo->map_count--;
 247         if (bo->map_count > 0)
 248                 return;
 249         bo->kptr = NULL;
 250         ttm_bo_vunmap(&bo->tbo, &bo->map);
 251         __qxl_bo_unpin(bo);
 252 }
 253
 254 int qxl_bo_vunmap(struct qxl_bo *bo)
 255 {
 256         int r;
 257
 258         r = qxl_bo_reserve(bo);
 259         if (r)
 260                 return r;
 261
 262         qxl_bo_vunmap_locked(bo);
 263         qxl_bo_unreserve(bo);
 264         return 0;
 265 }
 266
 267 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 268                                struct qxl_bo *bo, void *pmap)
 269 {
 270         if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) &&
 271             (bo->tbo.resource->mem_type != TTM_PL_PRIV))
 272                 goto fallback;
 273
 274         io_mapping_unmap_atomic(pmap);
 275         return;
 276  fallback:
 277         qxl_bo_vunmap_locked(bo);
 278 }
 279
 280 void qxl_bo_unref(struct qxl_bo **bo)
 281 {
 282         if ((*bo) == NULL)
 283                 return;
 284
 285         drm_gem_object_put(&(*bo)->tbo.base);
 286         *bo = NULL;
 287 }
 288
 289 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 290 {
 291         drm_gem_object_get(&bo->tbo.base);
 292         return bo;
 293 }
 294
 295 static int __qxl_bo_pin(struct qxl_bo *bo)
 296 {
 297         struct ttm_operation_ctx ctx = { false, false };
 298         struct drm_device *ddev = bo->tbo.base.dev;
 299         int r;
 300
 301         if (bo->tbo.pin_count) {
 302                 ttm_bo_pin(&bo->tbo);
 303                 return 0;
 304         }
 305         qxl_ttm_placement_from_domain(bo, bo->type);
 306         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 307         if (likely(r == 0))
 308                 ttm_bo_pin(&bo->tbo);
 309         if (unlikely(r != 0))
 310                 dev_err(ddev->dev, "%p pin failed\n", bo);
 311         return r;
 312 }
 313
 314 static void __qxl_bo_unpin(struct qxl_bo *bo)
 315 {
 316         ttm_bo_unpin(&bo->tbo);
 317 }
 318
 319 /*
 320  * Reserve the BO before pinning the object.  If the BO was reserved
 321  * beforehand, use the internal version directly __qxl_bo_pin.
 322  *
 323  */
 324 int qxl_bo_pin(struct qxl_bo *bo)
 325 {
 326         int r;
 327
 328         r = qxl_bo_reserve(bo);
 329         if (r)
 330                 return r;
 331
 332         r = __qxl_bo_pin(bo);
 333         qxl_bo_unreserve(bo);
 334         return r;
 335 }
 336
 337 /*
 338  * Reserve the BO before pinning the object.  If the BO was reserved
 339  * beforehand, use the internal version directly __qxl_bo_unpin.
 340  *
 341  */
 342 int qxl_bo_unpin(struct qxl_bo *bo)
 343 {
 344         int r;
 345
 346         r = qxl_bo_reserve(bo);
 347         if (r)
 348                 return r;
 349
 350         __qxl_bo_unpin(bo);
 351         qxl_bo_unreserve(bo);
 352         return 0;
 353 }
 354
 355 void qxl_bo_force_delete(struct qxl_device *qdev)
 356 {
 357         struct qxl_bo *bo, *n;
 358
 359         if (list_empty(&qdev->gem.objects))
 360                 return;
 361         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 362         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 363                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 364                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 365                         *((unsigned long *)&bo->tbo.base.refcount));
 366                 mutex_lock(&qdev->gem.mutex);
 367                 list_del_init(&bo->list);
 368                 mutex_unlock(&qdev->gem.mutex);
 369                 /* this should unref the ttm bo */
 370                 drm_gem_object_put(&bo->tbo.base);
 371         }
 372 }
 373
 374 int qxl_bo_init(struct qxl_device *qdev)
 375 {
 376         return qxl_ttm_init(qdev);
 377 }
 378
 379 void qxl_bo_fini(struct qxl_device *qdev)
 380 {
 381         qxl_ttm_fini(qdev);
 382 }
 383
 384 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 385 {
 386         int ret;
 387
 388         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 389                 /* allocate a surface id for this surface now */
 390                 ret = qxl_surface_id_alloc(qdev, bo);
 391                 if (ret)
 392                         return ret;
 393
 394                 ret = qxl_hw_surface_alloc(qdev, bo);
 395                 if (ret)
 396                         return ret;
 397         }
 398         return 0;
 399 }
 400
 401 int qxl_surf_evict(struct qxl_device *qdev)
 402 {
 403         struct ttm_resource_manager *man;
 404
 405         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 406         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 407 }
 408
 409 int qxl_vram_evict(struct qxl_device *qdev)
 410 {
 411         struct ttm_resource_manager *man;
 412
 413         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 414         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 415 }