drivers/gpu/drm/qxl/qxl_release.c

   1 /*
   2  * Copyright 2011 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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  19  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  20  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22 #include "qxl_drv.h"
  23 #include "qxl_object.h"
  24
  25 /*
  26  * drawable cmd cache - allocate a bunch of VRAM pages, suballocate
  27  * into 256 byte chunks for now - gives 16 cmds per page.
  28  *
  29  * use an ida to index into the chunks?
  30  */
  31 /* manage releaseables */
  32 /* stack them 16 high for now -drawable object is 191 */
  33 #define RELEASE_SIZE 256
  34 #define RELEASES_PER_BO (4096 / RELEASE_SIZE)
  35 /* put an alloc/dealloc surface cmd into one bo and round up to 128 */
  36 #define SURFACE_RELEASE_SIZE 128
  37 #define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE)
  38
  39 static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE };
  40 static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO };
  41
  42 static uint64_t
  43 qxl_release_alloc(struct qxl_device *qdev, int type,
  44                   struct qxl_release **ret)
  45 {
  46         struct qxl_release *release;
  47         int handle;
  48         size_t size = sizeof(*release);
  49         int idr_ret;
  50
  51         release = kmalloc(size, GFP_KERNEL);
  52         if (!release) {
  53                 DRM_ERROR("Out of memory\n");
  54                 return 0;
  55         }
  56         release->type = type;
  57         release->release_offset = 0;
  58         release->surface_release_id = 0;
  59         INIT_LIST_HEAD(&release->bos);
  60
  61         idr_preload(GFP_KERNEL);
  62         spin_lock(&qdev->release_idr_lock);
  63         idr_ret = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
  64         spin_unlock(&qdev->release_idr_lock);
  65         idr_preload_end();
  66         handle = idr_ret;
  67         if (idr_ret < 0)
  68                 goto release_fail;
  69         *ret = release;
  70         QXL_INFO(qdev, "allocated release %lld\n", handle);
  71         release->id = handle;
  72 release_fail:
  73
  74         return handle;
  75 }
  76
  77 void
  78 qxl_release_free(struct qxl_device *qdev,
  79                  struct qxl_release *release)
  80 {
  81         struct qxl_bo_list *entry, *tmp;
  82         QXL_INFO(qdev, "release %d, type %d\n", release->id,
  83                  release->type);
  84
  85         if (release->surface_release_id)
  86                 qxl_surface_id_dealloc(qdev, release->surface_release_id);
  87
  88         list_for_each_entry_safe(entry, tmp, &release->bos, tv.head) {
  89                 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
  90                 QXL_INFO(qdev, "release %llx\n",
  91                         drm_vma_node_offset_addr(&entry->tv.bo->vma_node)
  92                                                 - DRM_FILE_OFFSET);
  93                 qxl_fence_remove_release(&bo->fence, release->id);
  94                 qxl_bo_unref(&bo);
  95                 kfree(entry);
  96         }
  97         spin_lock(&qdev->release_idr_lock);
  98         idr_remove(&qdev->release_idr, release->id);
  99         spin_unlock(&qdev->release_idr_lock);
 100         kfree(release);
 101 }
 102
 103 static int qxl_release_bo_alloc(struct qxl_device *qdev,
 104                                 struct qxl_bo **bo)
 105 {
 106         int ret;
 107         /* pin releases bo's they are too messy to evict */
 108         ret = qxl_bo_create(qdev, PAGE_SIZE, false, true,
 109                             QXL_GEM_DOMAIN_VRAM, NULL,
 110                             bo);
 111         return ret;
 112 }
 113
 114 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
 115 {
 116         struct qxl_bo_list *entry;
 117
 118         list_for_each_entry(entry, &release->bos, tv.head) {
 119                 if (entry->tv.bo == &bo->tbo)
 120                         return 0;
 121         }
 122
 123         entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
 124         if (!entry)
 125                 return -ENOMEM;
 126
 127         qxl_bo_ref(bo);
 128         entry->tv.bo = &bo->tbo;
 129         list_add_tail(&entry->tv.head, &release->bos);
 130         return 0;
 131 }
 132
 133 static int qxl_release_validate_bo(struct qxl_bo *bo)
 134 {
 135         int ret;
 136
 137         if (!bo->pin_count) {
 138                 qxl_ttm_placement_from_domain(bo, bo->type, false);
 139                 ret = ttm_bo_validate(&bo->tbo, &bo->placement,
 140                                       true, false);
 141                 if (ret)
 142                         return ret;
 143         }
 144
 145         /* allocate a surface for reserved + validated buffers */
 146         ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
 147         if (ret)
 148                 return ret;
 149         return 0;
 150 }
 151
 152 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)
 153 {
 154         int ret;
 155         struct qxl_bo_list *entry;
 156
 157         /* if only one object on the release its the release itself
 158            since these objects are pinned no need to reserve */
 159         if (list_is_singular(&release->bos))
 160                 return 0;
 161
 162         ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos);
 163         if (ret)
 164                 return ret;
 165
 166         list_for_each_entry(entry, &release->bos, tv.head) {
 167                 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 168
 169                 ret = qxl_release_validate_bo(bo);
 170                 if (ret) {
 171                         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 172                         return ret;
 173                 }
 174         }
 175         return 0;
 176 }
 177
 178 void qxl_release_backoff_reserve_list(struct qxl_release *release)
 179 {
 180         /* if only one object on the release its the release itself
 181            since these objects are pinned no need to reserve */
 182         if (list_is_singular(&release->bos))
 183                 return;
 184
 185         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 186 }
 187
 188
 189 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
 190                                        enum qxl_surface_cmd_type surface_cmd_type,
 191                                        struct qxl_release *create_rel,
 192                                        struct qxl_release **release)
 193 {
 194         if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
 195                 int idr_ret;
 196                 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
 197                 struct qxl_bo *bo;
 198                 union qxl_release_info *info;
 199
 200                 /* stash the release after the create command */
 201                 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
 202                 bo = qxl_bo_ref(to_qxl_bo(entry->tv.bo));
 203
 204                 (*release)->release_offset = create_rel->release_offset + 64;
 205
 206                 qxl_release_list_add(*release, bo);
 207
 208                 info = qxl_release_map(qdev, *release);
 209                 info->id = idr_ret;
 210                 qxl_release_unmap(qdev, *release, info);
 211
 212                 qxl_bo_unref(&bo);
 213                 return 0;
 214         }
 215
 216         return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
 217                                          QXL_RELEASE_SURFACE_CMD, release, NULL);
 218 }
 219
 220 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 221                                        int type, struct qxl_release **release,
 222                                        struct qxl_bo **rbo)
 223 {
 224         struct qxl_bo *bo;
 225         int idr_ret;
 226         int ret = 0;
 227         union qxl_release_info *info;
 228         int cur_idx;
 229
 230         if (type == QXL_RELEASE_DRAWABLE)
 231                 cur_idx = 0;
 232         else if (type == QXL_RELEASE_SURFACE_CMD)
 233                 cur_idx = 1;
 234         else if (type == QXL_RELEASE_CURSOR_CMD)
 235                 cur_idx = 2;
 236         else {
 237                 DRM_ERROR("got illegal type: %d\n", type);
 238                 return -EINVAL;
 239         }
 240
 241         idr_ret = qxl_release_alloc(qdev, type, release);
 242
 243         mutex_lock(&qdev->release_mutex);
 244         if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
 245                 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
 246                 qdev->current_release_bo_offset[cur_idx] = 0;
 247                 qdev->current_release_bo[cur_idx] = NULL;
 248         }
 249         if (!qdev->current_release_bo[cur_idx]) {
 250                 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
 251                 if (ret) {
 252                         mutex_unlock(&qdev->release_mutex);
 253                         return ret;
 254                 }
 255         }
 256
 257         bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
 258
 259         (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
 260         qdev->current_release_bo_offset[cur_idx]++;
 261
 262         if (rbo)
 263                 *rbo = bo;
 264
 265         mutex_unlock(&qdev->release_mutex);
 266
 267         qxl_release_list_add(*release, bo);
 268
 269         info = qxl_release_map(qdev, *release);
 270         info->id = idr_ret;
 271         qxl_release_unmap(qdev, *release, info);
 272
 273         qxl_bo_unref(&bo);
 274         return ret;
 275 }
 276
 277 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
 278                                                    uint64_t id)
 279 {
 280         struct qxl_release *release;
 281
 282         spin_lock(&qdev->release_idr_lock);
 283         release = idr_find(&qdev->release_idr, id);
 284         spin_unlock(&qdev->release_idr_lock);
 285         if (!release) {
 286                 DRM_ERROR("failed to find id in release_idr\n");
 287                 return NULL;
 288         }
 289
 290         return release;
 291 }
 292
 293 union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
 294                                         struct qxl_release *release)
 295 {
 296         void *ptr;
 297         union qxl_release_info *info;
 298         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 299         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 300
 301         ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
 302         if (!ptr)
 303                 return NULL;
 304         info = ptr + (release->release_offset & ~PAGE_SIZE);
 305         return info;
 306 }
 307
 308 void qxl_release_unmap(struct qxl_device *qdev,
 309                        struct qxl_release *release,
 310                        union qxl_release_info *info)
 311 {
 312         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 313         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 314         void *ptr;
 315
 316         ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
 317         qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
 318 }
 319
 320 void qxl_release_fence_buffer_objects(struct qxl_release *release)
 321 {
 322         struct ttm_validate_buffer *entry;
 323         struct ttm_buffer_object *bo;
 324         struct ttm_bo_global *glob;
 325         struct ttm_bo_device *bdev;
 326         struct ttm_bo_driver *driver;
 327         struct qxl_bo *qbo;
 328
 329         /* if only one object on the release its the release itself
 330            since these objects are pinned no need to reserve */
 331         if (list_is_singular(&release->bos))
 332                 return;
 333
 334         bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;
 335         bdev = bo->bdev;
 336         driver = bdev->driver;
 337         glob = bo->glob;
 338
 339         spin_lock(&glob->lru_lock);
 340         spin_lock(&bdev->fence_lock);
 341
 342         list_for_each_entry(entry, &release->bos, head) {
 343                 bo = entry->bo;
 344                 qbo = to_qxl_bo(bo);
 345
 346                 if (!entry->bo->sync_obj)
 347                         entry->bo->sync_obj = &qbo->fence;
 348
 349                 qxl_fence_add_release_locked(&qbo->fence, release->id);
 350
 351                 ttm_bo_add_to_lru(bo);
 352                 ww_mutex_unlock(&bo->resv->lock);
 353                 entry->reserved = false;
 354         }
 355         spin_unlock(&bdev->fence_lock);
 356         spin_unlock(&glob->lru_lock);
 357         ww_acquire_fini(&release->ticket);
 358 }
 359