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 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         if (domain == QXL_GEM_DOMAIN_VRAM) {
  67                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  68                 qbo->placements[c++].flags = pflag;
  69         }
  70         if (domain == QXL_GEM_DOMAIN_SURFACE) {
  71                 qbo->placements[c].mem_type = TTM_PL_PRIV;
  72                 qbo->placements[c++].flags = pflag;
  73                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  74                 qbo->placements[c++].flags = pflag;
  75         }
  76         if (domain == QXL_GEM_DOMAIN_CPU) {
  77                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  78                 qbo->placements[c++].flags = pflag;
  79         }
  80         if (!c) {
  81                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  82                 qbo->placements[c++].flags = 0;
  83         }
  84         qbo->placement.num_placement = c;
  85         for (i = 0; i < c; ++i) {
  86                 qbo->placements[i].fpfn = 0;
  87                 qbo->placements[i].lpfn = 0;
  88         }
  89 }
  90
  91 static const struct drm_gem_object_funcs qxl_object_funcs = {
  92         .free = qxl_gem_object_free,
  93         .open = qxl_gem_object_open,
  94         .close = qxl_gem_object_close,
  95         .pin = qxl_gem_prime_pin,
  96         .unpin = qxl_gem_prime_unpin,
  97         .get_sg_table = qxl_gem_prime_get_sg_table,
  98         .vmap = qxl_gem_prime_vmap,
  99         .vunmap = qxl_gem_prime_vunmap,
 100         .mmap = drm_gem_ttm_mmap,
 101         .print_info = drm_gem_ttm_print_info,
 102 };
 103
 104 int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
 105                   bool kernel, bool pinned, u32 domain, u32 priority,
 106                   struct qxl_surface *surf,
 107                   struct qxl_bo **bo_ptr)
 108 {
 109         struct ttm_operation_ctx ctx = { !kernel, false };
 110         struct qxl_bo *bo;
 111         enum ttm_bo_type type;
 112         int r;
 113
 114         if (kernel)
 115                 type = ttm_bo_type_kernel;
 116         else
 117                 type = ttm_bo_type_device;
 118         *bo_ptr = NULL;
 119         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
 120         if (bo == NULL)
 121                 return -ENOMEM;
 122         size = roundup(size, PAGE_SIZE);
 123         r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
 124         if (unlikely(r)) {
 125                 kfree(bo);
 126                 return r;
 127         }
 128         bo->tbo.base.funcs = &qxl_object_funcs;
 129         bo->type = domain;
 130         bo->surface_id = 0;
 131         INIT_LIST_HEAD(&bo->list);
 132
 133         if (surf)
 134                 bo->surf = *surf;
 135
 136         qxl_ttm_placement_from_domain(bo, domain);
 137
 138         bo->tbo.priority = priority;
 139         r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, type,
 140                                  &bo->placement, 0, &ctx, NULL, NULL,
 141                                  &qxl_ttm_bo_destroy);
 142         if (unlikely(r != 0)) {
 143                 if (r != -ERESTARTSYS)
 144                         dev_err(qdev->ddev.dev,
 145                                 "object_init failed for (%lu, 0x%08X)\n",
 146                                 size, domain);
 147                 return r;
 148         }
 149         if (pinned)
 150                 ttm_bo_pin(&bo->tbo);
 151         ttm_bo_unreserve(&bo->tbo);
 152         *bo_ptr = bo;
 153         return 0;
 154 }
 155
 156 int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map)
 157 {
 158         int r;
 159
 160         dma_resv_assert_held(bo->tbo.base.resv);
 161
 162         if (bo->kptr) {
 163                 bo->map_count++;
 164                 goto out;
 165         }
 166
 167         r = ttm_bo_vmap(&bo->tbo, &bo->map);
 168         if (r) {
 169                 qxl_bo_unpin_locked(bo);
 170                 return r;
 171         }
 172         bo->map_count = 1;
 173
 174         /* TODO: Remove kptr in favor of map everywhere. */
 175         if (bo->map.is_iomem)
 176                 bo->kptr = (void *)bo->map.vaddr_iomem;
 177         else
 178                 bo->kptr = bo->map.vaddr;
 179
 180 out:
 181         *map = bo->map;
 182         return 0;
 183 }
 184
 185 int qxl_bo_pin_and_vmap(struct qxl_bo *bo, struct iosys_map *map)
 186 {
 187         int r;
 188
 189         r = qxl_bo_reserve(bo);
 190         if (r)
 191                 return r;
 192
 193         r = qxl_bo_pin_locked(bo);
 194         if (r) {
 195                 qxl_bo_unreserve(bo);
 196                 return r;
 197         }
 198
 199         r = qxl_bo_vmap_locked(bo, map);
 200         if (r)
 201                 qxl_bo_unpin_locked(bo);
 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_and_unpin(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_locked(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 int qxl_bo_pin_locked(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         dma_resv_assert_held(bo->tbo.base.resv);
 301
 302         if (bo->tbo.pin_count) {
 303                 ttm_bo_pin(&bo->tbo);
 304                 return 0;
 305         }
 306         qxl_ttm_placement_from_domain(bo, bo->type);
 307         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 308         if (likely(r == 0))
 309                 ttm_bo_pin(&bo->tbo);
 310         if (unlikely(r != 0))
 311                 dev_err(ddev->dev, "%p pin failed\n", bo);
 312         return r;
 313 }
 314
 315 void qxl_bo_unpin_locked(struct qxl_bo *bo)
 316 {
 317         dma_resv_assert_held(bo->tbo.base.resv);
 318
 319         ttm_bo_unpin(&bo->tbo);
 320 }
 321
 322 /*
 323  * Reserve the BO before pinning the object.  If the BO was reserved
 324  * beforehand, use the internal version directly qxl_bo_pin_locked.
 325  *
 326  */
 327 int qxl_bo_pin(struct qxl_bo *bo)
 328 {
 329         int r;
 330
 331         r = qxl_bo_reserve(bo);
 332         if (r)
 333                 return r;
 334
 335         r = qxl_bo_pin_locked(bo);
 336         qxl_bo_unreserve(bo);
 337         return r;
 338 }
 339
 340 /*
 341  * Reserve the BO before pinning the object.  If the BO was reserved
 342  * beforehand, use the internal version directly qxl_bo_unpin_locked.
 343  *
 344  */
 345 int qxl_bo_unpin(struct qxl_bo *bo)
 346 {
 347         int r;
 348
 349         r = qxl_bo_reserve(bo);
 350         if (r)
 351                 return r;
 352
 353         qxl_bo_unpin_locked(bo);
 354         qxl_bo_unreserve(bo);
 355         return 0;
 356 }
 357
 358 void qxl_bo_force_delete(struct qxl_device *qdev)
 359 {
 360         struct qxl_bo *bo, *n;
 361
 362         if (list_empty(&qdev->gem.objects))
 363                 return;
 364         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 365         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 366                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 367                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 368                         *((unsigned long *)&bo->tbo.base.refcount));
 369                 mutex_lock(&qdev->gem.mutex);
 370                 list_del_init(&bo->list);
 371                 mutex_unlock(&qdev->gem.mutex);
 372                 /* this should unref the ttm bo */
 373                 drm_gem_object_put(&bo->tbo.base);
 374         }
 375 }
 376
 377 int qxl_bo_init(struct qxl_device *qdev)
 378 {
 379         return qxl_ttm_init(qdev);
 380 }
 381
 382 void qxl_bo_fini(struct qxl_device *qdev)
 383 {
 384         qxl_ttm_fini(qdev);
 385 }
 386
 387 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 388 {
 389         int ret;
 390
 391         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 392                 /* allocate a surface id for this surface now */
 393                 ret = qxl_surface_id_alloc(qdev, bo);
 394                 if (ret)
 395                         return ret;
 396
 397                 ret = qxl_hw_surface_alloc(qdev, bo);
 398                 if (ret)
 399                         return ret;
 400         }
 401         return 0;
 402 }
 403
 404 int qxl_surf_evict(struct qxl_device *qdev)
 405 {
 406         struct ttm_resource_manager *man;
 407
 408         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 409         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 410 }
 411
 412 int qxl_vram_evict(struct qxl_device *qdev)
 413 {
 414         struct ttm_resource_manager *man;
 415
 416         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 417         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 418 }