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 = to_qxl(bo->tbo.base.dev);
  37
  38         qxl_surface_evict(qdev, bo, false);
  39         WARN_ON_ONCE(bo->map_count > 0);
  40         mutex_lock(&qdev->gem.mutex);
  41         list_del_init(&bo->list);
  42         mutex_unlock(&qdev->gem.mutex);
  43         drm_gem_object_release(&bo->tbo.base);
  44         kfree(bo);
  45 }
  46
  47 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  48 {
  49         if (bo->destroy == &qxl_ttm_bo_destroy)
  50                 return true;
  51         return false;
  52 }
  53
  54 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
  55 {
  56         u32 c = 0;
  57         u32 pflag = 0;
  58         unsigned int i;
  59
  60         if (pinned)
  61                 pflag |= TTM_PL_FLAG_NO_EVICT;
  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 = TTM_PL_FLAG_CACHED | pflag;
  70         }
  71         if (domain == QXL_GEM_DOMAIN_SURFACE) {
  72                 qbo->placements[c].mem_type = TTM_PL_PRIV;
  73                 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag;
  74                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  75                 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag;
  76         }
  77         if (domain == QXL_GEM_DOMAIN_CPU) {
  78                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  79                 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | pflag;
  80         }
  81         if (!c) {
  82                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  83                 qbo->placements[c++].flags = TTM_PL_MASK_CACHING;
  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 qxl_bo *bo;
 112         enum ttm_bo_type type;
 113         int r;
 114
 115         if (kernel)
 116                 type = ttm_bo_type_kernel;
 117         else
 118                 type = ttm_bo_type_device;
 119         *bo_ptr = NULL;
 120         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
 121         if (bo == NULL)
 122                 return -ENOMEM;
 123         size = roundup(size, PAGE_SIZE);
 124         r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
 125         if (unlikely(r)) {
 126                 kfree(bo);
 127                 return r;
 128         }
 129         bo->tbo.base.funcs = &qxl_object_funcs;
 130         bo->type = domain;
 131         bo->pin_count = pinned ? 1 : 0;
 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, pinned);
 139
 140         r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
 141                         &bo->placement, 0, !kernel, 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         *bo_ptr = bo;
 151         return 0;
 152 }
 153
 154 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
 155 {
 156         bool is_iomem;
 157         int r;
 158
 159         if (bo->kptr) {
 160                 if (ptr)
 161                         *ptr = bo->kptr;
 162                 bo->map_count++;
 163                 return 0;
 164         }
 165         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 166         if (r)
 167                 return r;
 168         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 169         if (ptr)
 170                 *ptr = bo->kptr;
 171         bo->map_count = 1;
 172         return 0;
 173 }
 174
 175 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 176                               struct qxl_bo *bo, int page_offset)
 177 {
 178         unsigned long offset;
 179         void *rptr;
 180         int ret;
 181         struct io_mapping *map;
 182
 183         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 184                 map = qdev->vram_mapping;
 185         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV)
 186                 map = qdev->surface_mapping;
 187         else
 188                 goto fallback;
 189
 190         offset = bo->tbo.mem.start << PAGE_SHIFT;
 191         return io_mapping_map_atomic_wc(map, offset + page_offset);
 192 fallback:
 193         if (bo->kptr) {
 194                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 195                 return rptr;
 196         }
 197
 198         ret = qxl_bo_kmap(bo, &rptr);
 199         if (ret)
 200                 return NULL;
 201
 202         rptr += page_offset * PAGE_SIZE;
 203         return rptr;
 204 }
 205
 206 void qxl_bo_kunmap(struct qxl_bo *bo)
 207 {
 208         if (bo->kptr == NULL)
 209                 return;
 210         bo->map_count--;
 211         if (bo->map_count > 0)
 212                 return;
 213         bo->kptr = NULL;
 214         ttm_bo_kunmap(&bo->kmap);
 215 }
 216
 217 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 218                                struct qxl_bo *bo, void *pmap)
 219 {
 220         if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) &&
 221             (bo->tbo.mem.mem_type != TTM_PL_PRIV))
 222                 goto fallback;
 223
 224         io_mapping_unmap_atomic(pmap);
 225         return;
 226  fallback:
 227         qxl_bo_kunmap(bo);
 228 }
 229
 230 void qxl_bo_unref(struct qxl_bo **bo)
 231 {
 232         if ((*bo) == NULL)
 233                 return;
 234
 235         drm_gem_object_put(&(*bo)->tbo.base);
 236         *bo = NULL;
 237 }
 238
 239 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 240 {
 241         drm_gem_object_get(&bo->tbo.base);
 242         return bo;
 243 }
 244
 245 static int __qxl_bo_pin(struct qxl_bo *bo)
 246 {
 247         struct ttm_operation_ctx ctx = { false, false };
 248         struct drm_device *ddev = bo->tbo.base.dev;
 249         int r;
 250
 251         if (bo->pin_count) {
 252                 bo->pin_count++;
 253                 return 0;
 254         }
 255         qxl_ttm_placement_from_domain(bo, bo->type, true);
 256         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 257         if (likely(r == 0)) {
 258                 bo->pin_count = 1;
 259         }
 260         if (unlikely(r != 0))
 261                 dev_err(ddev->dev, "%p pin failed\n", bo);
 262         return r;
 263 }
 264
 265 static int __qxl_bo_unpin(struct qxl_bo *bo)
 266 {
 267         struct ttm_operation_ctx ctx = { false, false };
 268         struct drm_device *ddev = bo->tbo.base.dev;
 269         int r, i;
 270
 271         if (!bo->pin_count) {
 272                 dev_warn(ddev->dev, "%p unpin not necessary\n", bo);
 273                 return 0;
 274         }
 275         bo->pin_count--;
 276         if (bo->pin_count)
 277                 return 0;
 278         for (i = 0; i < bo->placement.num_placement; i++)
 279                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 280         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 281         if (unlikely(r != 0))
 282                 dev_err(ddev->dev, "%p validate failed for unpin\n", bo);
 283         return r;
 284 }
 285
 286 /*
 287  * Reserve the BO before pinning the object.  If the BO was reserved
 288  * beforehand, use the internal version directly __qxl_bo_pin.
 289  *
 290  */
 291 int qxl_bo_pin(struct qxl_bo *bo)
 292 {
 293         int r;
 294
 295         r = qxl_bo_reserve(bo);
 296         if (r)
 297                 return r;
 298
 299         r = __qxl_bo_pin(bo);
 300         qxl_bo_unreserve(bo);
 301         return r;
 302 }
 303
 304 /*
 305  * Reserve the BO before pinning the object.  If the BO was reserved
 306  * beforehand, use the internal version directly __qxl_bo_unpin.
 307  *
 308  */
 309 int qxl_bo_unpin(struct qxl_bo *bo)
 310 {
 311         int r;
 312
 313         r = qxl_bo_reserve(bo);
 314         if (r)
 315                 return r;
 316
 317         r = __qxl_bo_unpin(bo);
 318         qxl_bo_unreserve(bo);
 319         return r;
 320 }
 321
 322 void qxl_bo_force_delete(struct qxl_device *qdev)
 323 {
 324         struct qxl_bo *bo, *n;
 325
 326         if (list_empty(&qdev->gem.objects))
 327                 return;
 328         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 329         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 330                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 331                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 332                         *((unsigned long *)&bo->tbo.base.refcount));
 333                 mutex_lock(&qdev->gem.mutex);
 334                 list_del_init(&bo->list);
 335                 mutex_unlock(&qdev->gem.mutex);
 336                 /* this should unref the ttm bo */
 337                 drm_gem_object_put(&bo->tbo.base);
 338         }
 339 }
 340
 341 int qxl_bo_init(struct qxl_device *qdev)
 342 {
 343         return qxl_ttm_init(qdev);
 344 }
 345
 346 void qxl_bo_fini(struct qxl_device *qdev)
 347 {
 348         qxl_ttm_fini(qdev);
 349 }
 350
 351 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 352 {
 353         int ret;
 354
 355         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 356                 /* allocate a surface id for this surface now */
 357                 ret = qxl_surface_id_alloc(qdev, bo);
 358                 if (ret)
 359                         return ret;
 360
 361                 ret = qxl_hw_surface_alloc(qdev, bo);
 362                 if (ret)
 363                         return ret;
 364         }
 365         return 0;
 366 }
 367
 368 int qxl_surf_evict(struct qxl_device *qdev)
 369 {
 370         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 371 }
 372
 373 int qxl_vram_evict(struct qxl_device *qdev)
 374 {
 375         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 376 }