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, size, 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         r = ttm_bo_vmap(&bo->tbo, &bo->map);
 172         if (r)
 173                 return r;
 174         bo->map_count = 1;
 175
 176         /* TODO: Remove kptr in favor of map everywhere. */
 177         if (bo->map.is_iomem)
 178                 bo->kptr = (void *)bo->map.vaddr_iomem;
 179         else
 180                 bo->kptr = bo->map.vaddr;
 181
 182 out:
 183         *map = bo->map;
 184         return 0;
 185 }
 186
 187 int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map)
 188 {
 189         int r;
 190
 191         r = qxl_bo_reserve(bo);
 192         if (r)
 193                 return r;
 194
 195         r = __qxl_bo_pin(bo);
 196         if (r) {
 197                 qxl_bo_unreserve(bo);
 198                 return r;
 199         }
 200
 201         r = qxl_bo_vmap_locked(bo, map);
 202         qxl_bo_unreserve(bo);
 203         return r;
 204 }
 205
 206 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 207                               struct qxl_bo *bo, int page_offset)
 208 {
 209         unsigned long offset;
 210         void *rptr;
 211         int ret;
 212         struct io_mapping *map;
 213         struct iosys_map bo_map;
 214
 215         if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
 216                 map = qdev->vram_mapping;
 217         else if (bo->tbo.resource->mem_type == TTM_PL_PRIV)
 218                 map = qdev->surface_mapping;
 219         else
 220                 goto fallback;
 221
 222         offset = bo->tbo.resource->start << PAGE_SHIFT;
 223         return io_mapping_map_atomic_wc(map, offset + page_offset);
 224 fallback:
 225         if (bo->kptr) {
 226                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 227                 return rptr;
 228         }
 229
 230         ret = qxl_bo_vmap_locked(bo, &bo_map);
 231         if (ret)
 232                 return NULL;
 233         rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
 234
 235         rptr += page_offset * PAGE_SIZE;
 236         return rptr;
 237 }
 238
 239 void qxl_bo_vunmap_locked(struct qxl_bo *bo)
 240 {
 241         dma_resv_assert_held(bo->tbo.base.resv);
 242
 243         if (bo->kptr == NULL)
 244                 return;
 245         bo->map_count--;
 246         if (bo->map_count > 0)
 247                 return;
 248         bo->kptr = NULL;
 249         ttm_bo_vunmap(&bo->tbo, &bo->map);
 250 }
 251
 252 int qxl_bo_vunmap(struct qxl_bo *bo)
 253 {
 254         int r;
 255
 256         r = qxl_bo_reserve(bo);
 257         if (r)
 258                 return r;
 259
 260         qxl_bo_vunmap_locked(bo);
 261         __qxl_bo_unpin(bo);
 262         qxl_bo_unreserve(bo);
 263         return 0;
 264 }
 265
 266 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 267                                struct qxl_bo *bo, void *pmap)
 268 {
 269         if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) &&
 270             (bo->tbo.resource->mem_type != TTM_PL_PRIV))
 271                 goto fallback;
 272
 273         io_mapping_unmap_atomic(pmap);
 274         return;
 275  fallback:
 276         qxl_bo_vunmap_locked(bo);
 277 }
 278
 279 void qxl_bo_unref(struct qxl_bo **bo)
 280 {
 281         if ((*bo) == NULL)
 282                 return;
 283
 284         drm_gem_object_put(&(*bo)->tbo.base);
 285         *bo = NULL;
 286 }
 287
 288 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 289 {
 290         drm_gem_object_get(&bo->tbo.base);
 291         return bo;
 292 }
 293
 294 static int __qxl_bo_pin(struct qxl_bo *bo)
 295 {
 296         struct ttm_operation_ctx ctx = { false, false };
 297         struct drm_device *ddev = bo->tbo.base.dev;
 298         int r;
 299
 300         if (bo->tbo.pin_count) {
 301                 ttm_bo_pin(&bo->tbo);
 302                 return 0;
 303         }
 304         qxl_ttm_placement_from_domain(bo, bo->type);
 305         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 306         if (likely(r == 0))
 307                 ttm_bo_pin(&bo->tbo);
 308         if (unlikely(r != 0))
 309                 dev_err(ddev->dev, "%p pin failed\n", bo);
 310         return r;
 311 }
 312
 313 static void __qxl_bo_unpin(struct qxl_bo *bo)
 314 {
 315         ttm_bo_unpin(&bo->tbo);
 316 }
 317
 318 /*
 319  * Reserve the BO before pinning the object.  If the BO was reserved
 320  * beforehand, use the internal version directly __qxl_bo_pin.
 321  *
 322  */
 323 int qxl_bo_pin(struct qxl_bo *bo)
 324 {
 325         int r;
 326
 327         r = qxl_bo_reserve(bo);
 328         if (r)
 329                 return r;
 330
 331         r = __qxl_bo_pin(bo);
 332         qxl_bo_unreserve(bo);
 333         return r;
 334 }
 335
 336 /*
 337  * Reserve the BO before pinning the object.  If the BO was reserved
 338  * beforehand, use the internal version directly __qxl_bo_unpin.
 339  *
 340  */
 341 int qxl_bo_unpin(struct qxl_bo *bo)
 342 {
 343         int r;
 344
 345         r = qxl_bo_reserve(bo);
 346         if (r)
 347                 return r;
 348
 349         __qxl_bo_unpin(bo);
 350         qxl_bo_unreserve(bo);
 351         return 0;
 352 }
 353
 354 void qxl_bo_force_delete(struct qxl_device *qdev)
 355 {
 356         struct qxl_bo *bo, *n;
 357
 358         if (list_empty(&qdev->gem.objects))
 359                 return;
 360         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 361         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 362                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 363                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 364                         *((unsigned long *)&bo->tbo.base.refcount));
 365                 mutex_lock(&qdev->gem.mutex);
 366                 list_del_init(&bo->list);
 367                 mutex_unlock(&qdev->gem.mutex);
 368                 /* this should unref the ttm bo */
 369                 drm_gem_object_put(&bo->tbo.base);
 370         }
 371 }
 372
 373 int qxl_bo_init(struct qxl_device *qdev)
 374 {
 375         return qxl_ttm_init(qdev);
 376 }
 377
 378 void qxl_bo_fini(struct qxl_device *qdev)
 379 {
 380         qxl_ttm_fini(qdev);
 381 }
 382
 383 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 384 {
 385         int ret;
 386
 387         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 388                 /* allocate a surface id for this surface now */
 389                 ret = qxl_surface_id_alloc(qdev, bo);
 390                 if (ret)
 391                         return ret;
 392
 393                 ret = qxl_hw_surface_alloc(qdev, bo);
 394                 if (ret)
 395                         return ret;
 396         }
 397         return 0;
 398 }
 399
 400 int qxl_surf_evict(struct qxl_device *qdev)
 401 {
 402         struct ttm_resource_manager *man;
 403
 404         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 405         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 406 }
 407
 408 int qxl_vram_evict(struct qxl_device *qdev)
 409 {
 410         struct ttm_resource_manager *man;
 411
 412         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 413         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 414 }