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