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