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 #include <trace/events/dma_fence.h>
  25
  26 /*
  27  * drawable cmd cache - allocate a bunch of VRAM pages, suballocate
  28  * into 256 byte chunks for now - gives 16 cmds per page.
  29  *
  30  * use an ida to index into the chunks?
  31  */
  32 /* manage releaseables */
  33 /* stack them 16 high for now -drawable object is 191 */
  34 #define RELEASE_SIZE 256
  35 #define RELEASES_PER_BO (4096 / RELEASE_SIZE)
  36 /* put an alloc/dealloc surface cmd into one bo and round up to 128 */
  37 #define SURFACE_RELEASE_SIZE 128
  38 #define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE)
  39
  40 static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE };
  41 static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO };
  42
  43 static const char *qxl_get_driver_name(struct dma_fence *fence)
  44 {
  45         return "qxl";
  46 }
  47
  48 static const char *qxl_get_timeline_name(struct dma_fence *fence)
  49 {
  50         return "release";
  51 }
  52
  53 static bool qxl_nop_signaling(struct dma_fence *fence)
  54 {
  55         /* fences are always automatically signaled, so just pretend we did this.. */
  56         return true;
  57 }
  58
  59 static long qxl_fence_wait(struct dma_fence *fence, bool intr,
  60                            signed long timeout)
  61 {
  62         struct qxl_device *qdev;
  63         struct qxl_release *release;
  64         int count = 0, sc = 0;
  65         bool have_drawable_releases;
  66         unsigned long cur, end = jiffies + timeout;
  67
  68         qdev = container_of(fence->lock, struct qxl_device, release_lock);
  69         release = container_of(fence, struct qxl_release, base);
  70         have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE;
  71
  72 retry:
  73         sc++;
  74
  75         if (dma_fence_is_signaled(fence))
  76                 goto signaled;
  77
  78         qxl_io_notify_oom(qdev);
  79
  80         for (count = 0; count < 11; count++) {
  81                 if (!qxl_queue_garbage_collect(qdev, true))
  82                         break;
  83
  84                 if (dma_fence_is_signaled(fence))
  85                         goto signaled;
  86         }
  87
  88         if (dma_fence_is_signaled(fence))
  89                 goto signaled;
  90
  91         if (have_drawable_releases || sc < 4) {
  92                 if (sc > 2)
  93                         /* back off */
  94                         usleep_range(500, 1000);
  95
  96                 if (time_after(jiffies, end))
  97                         return 0;
  98
  99                 if (have_drawable_releases && sc > 300) {
 100                         DMA_FENCE_WARN(fence, "failed to wait on release %llu "
 101                                        "after spincount %d\n",
 102                                        fence->context & ~0xf0000000, sc);
 103                         goto signaled;
 104                 }
 105                 goto retry;
 106         }
 107         /*
 108          * yeah, original sync_obj_wait gave up after 3 spins when
 109          * have_drawable_releases is not set.
 110          */
 111
 112 signaled:
 113         cur = jiffies;
 114         if (time_after(cur, end))
 115                 return 0;
 116         return end - cur;
 117 }
 118
 119 static const struct dma_fence_ops qxl_fence_ops = {
 120         .get_driver_name = qxl_get_driver_name,
 121         .get_timeline_name = qxl_get_timeline_name,
 122         .enable_signaling = qxl_nop_signaling,
 123         .wait = qxl_fence_wait,
 124 };
 125
 126 static int
 127 qxl_release_alloc(struct qxl_device *qdev, int type,
 128                   struct qxl_release **ret)
 129 {
 130         struct qxl_release *release;
 131         int handle;
 132         size_t size = sizeof(*release);
 133
 134         release = kmalloc(size, GFP_KERNEL);
 135         if (!release) {
 136                 DRM_ERROR("Out of memory\n");
 137                 return -ENOMEM;
 138         }
 139         release->base.ops = NULL;
 140         release->type = type;
 141         release->release_offset = 0;
 142         release->surface_release_id = 0;
 143         INIT_LIST_HEAD(&release->bos);
 144
 145         idr_preload(GFP_KERNEL);
 146         spin_lock(&qdev->release_idr_lock);
 147         handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
 148         release->base.seqno = ++qdev->release_seqno;
 149         spin_unlock(&qdev->release_idr_lock);
 150         idr_preload_end();
 151         if (handle < 0) {
 152                 kfree(release);
 153                 *ret = NULL;
 154                 return handle;
 155         }
 156         *ret = release;
 157         DRM_DEBUG_DRIVER("allocated release %d\n", handle);
 158         release->id = handle;
 159         return handle;
 160 }
 161
 162 static void
 163 qxl_release_free_list(struct qxl_release *release)
 164 {
 165         while (!list_empty(&release->bos)) {
 166                 struct qxl_bo_list *entry;
 167                 struct qxl_bo *bo;
 168
 169                 entry = container_of(release->bos.next,
 170                                      struct qxl_bo_list, tv.head);
 171                 bo = to_qxl_bo(entry->tv.bo);
 172                 qxl_bo_unref(&bo);
 173                 list_del(&entry->tv.head);
 174                 kfree(entry);
 175         }
 176 }
 177
 178 void
 179 qxl_release_free(struct qxl_device *qdev,
 180                  struct qxl_release *release)
 181 {
 182         DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type);
 183
 184         if (release->surface_release_id)
 185                 qxl_surface_id_dealloc(qdev, release->surface_release_id);
 186
 187         spin_lock(&qdev->release_idr_lock);
 188         idr_remove(&qdev->release_idr, release->id);
 189         spin_unlock(&qdev->release_idr_lock);
 190
 191         if (release->base.ops) {
 192                 WARN_ON(list_empty(&release->bos));
 193                 qxl_release_free_list(release);
 194
 195                 dma_fence_signal(&release->base);
 196                 dma_fence_put(&release->base);
 197         } else {
 198                 qxl_release_free_list(release);
 199                 kfree(release);
 200         }
 201 }
 202
 203 static int qxl_release_bo_alloc(struct qxl_device *qdev,
 204                                 struct qxl_bo **bo)
 205 {
 206         /* pin releases bo's they are too messy to evict */
 207         return qxl_bo_create(qdev, PAGE_SIZE, false, true,
 208                              QXL_GEM_DOMAIN_VRAM, NULL, bo);
 209 }
 210
 211 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
 212 {
 213         struct qxl_bo_list *entry;
 214
 215         list_for_each_entry(entry, &release->bos, tv.head) {
 216                 if (entry->tv.bo == &bo->tbo)
 217                         return 0;
 218         }
 219
 220         entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
 221         if (!entry)
 222                 return -ENOMEM;
 223
 224         qxl_bo_ref(bo);
 225         entry->tv.bo = &bo->tbo;
 226         entry->tv.shared = false;
 227         list_add_tail(&entry->tv.head, &release->bos);
 228         return 0;
 229 }
 230
 231 static int qxl_release_validate_bo(struct qxl_bo *bo)
 232 {
 233         struct ttm_operation_ctx ctx = { true, false };
 234         int ret;
 235
 236         if (!bo->pin_count) {
 237                 qxl_ttm_placement_from_domain(bo, bo->type, false);
 238                 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 239                 if (ret)
 240                         return ret;
 241         }
 242
 243         ret = reservation_object_reserve_shared(bo->tbo.resv);
 244         if (ret)
 245                 return ret;
 246
 247         /* allocate a surface for reserved + validated buffers */
 248         ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
 249         if (ret)
 250                 return ret;
 251         return 0;
 252 }
 253
 254 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)
 255 {
 256         int ret;
 257         struct qxl_bo_list *entry;
 258
 259         /* if only one object on the release its the release itself
 260            since these objects are pinned no need to reserve */
 261         if (list_is_singular(&release->bos))
 262                 return 0;
 263
 264         ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos,
 265                                      !no_intr, NULL);
 266         if (ret)
 267                 return ret;
 268
 269         list_for_each_entry(entry, &release->bos, tv.head) {
 270                 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 271
 272                 ret = qxl_release_validate_bo(bo);
 273                 if (ret) {
 274                         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 275                         return ret;
 276                 }
 277         }
 278         return 0;
 279 }
 280
 281 void qxl_release_backoff_reserve_list(struct qxl_release *release)
 282 {
 283         /* if only one object on the release its the release itself
 284            since these objects are pinned no need to reserve */
 285         if (list_is_singular(&release->bos))
 286                 return;
 287
 288         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 289 }
 290
 291
 292 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
 293                                        enum qxl_surface_cmd_type surface_cmd_type,
 294                                        struct qxl_release *create_rel,
 295                                        struct qxl_release **release)
 296 {
 297         if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
 298                 int idr_ret;
 299                 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
 300                 struct qxl_bo *bo;
 301                 union qxl_release_info *info;
 302
 303                 /* stash the release after the create command */
 304                 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
 305                 if (idr_ret < 0)
 306                         return idr_ret;
 307                 bo = to_qxl_bo(entry->tv.bo);
 308
 309                 (*release)->release_offset = create_rel->release_offset + 64;
 310
 311                 qxl_release_list_add(*release, bo);
 312
 313                 info = qxl_release_map(qdev, *release);
 314                 info->id = idr_ret;
 315                 qxl_release_unmap(qdev, *release, info);
 316                 return 0;
 317         }
 318
 319         return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
 320                                          QXL_RELEASE_SURFACE_CMD, release, NULL);
 321 }
 322
 323 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 324                                        int type, struct qxl_release **release,
 325                                        struct qxl_bo **rbo)
 326 {
 327         struct qxl_bo *bo;
 328         int idr_ret;
 329         int ret = 0;
 330         union qxl_release_info *info;
 331         int cur_idx;
 332
 333         if (type == QXL_RELEASE_DRAWABLE)
 334                 cur_idx = 0;
 335         else if (type == QXL_RELEASE_SURFACE_CMD)
 336                 cur_idx = 1;
 337         else if (type == QXL_RELEASE_CURSOR_CMD)
 338                 cur_idx = 2;
 339         else {
 340                 DRM_ERROR("got illegal type: %d\n", type);
 341                 return -EINVAL;
 342         }
 343
 344         idr_ret = qxl_release_alloc(qdev, type, release);
 345         if (idr_ret < 0) {
 346                 if (rbo)
 347                         *rbo = NULL;
 348                 return idr_ret;
 349         }
 350
 351         mutex_lock(&qdev->release_mutex);
 352         if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
 353                 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
 354                 qdev->current_release_bo_offset[cur_idx] = 0;
 355                 qdev->current_release_bo[cur_idx] = NULL;
 356         }
 357         if (!qdev->current_release_bo[cur_idx]) {
 358                 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
 359                 if (ret) {
 360                         mutex_unlock(&qdev->release_mutex);
 361                         qxl_release_free(qdev, *release);
 362                         return ret;
 363                 }
 364         }
 365
 366         bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
 367
 368         (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
 369         qdev->current_release_bo_offset[cur_idx]++;
 370
 371         if (rbo)
 372                 *rbo = bo;
 373
 374         mutex_unlock(&qdev->release_mutex);
 375
 376         ret = qxl_release_list_add(*release, bo);
 377         qxl_bo_unref(&bo);
 378         if (ret) {
 379                 qxl_release_free(qdev, *release);
 380                 return ret;
 381         }
 382
 383         info = qxl_release_map(qdev, *release);
 384         info->id = idr_ret;
 385         qxl_release_unmap(qdev, *release, info);
 386
 387         return ret;
 388 }
 389
 390 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
 391                                                    uint64_t id)
 392 {
 393         struct qxl_release *release;
 394
 395         spin_lock(&qdev->release_idr_lock);
 396         release = idr_find(&qdev->release_idr, id);
 397         spin_unlock(&qdev->release_idr_lock);
 398         if (!release) {
 399                 DRM_ERROR("failed to find id in release_idr\n");
 400                 return NULL;
 401         }
 402
 403         return release;
 404 }
 405
 406 union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
 407                                         struct qxl_release *release)
 408 {
 409         void *ptr;
 410         union qxl_release_info *info;
 411         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 412         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 413
 414         ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
 415         if (!ptr)
 416                 return NULL;
 417         info = ptr + (release->release_offset & ~PAGE_SIZE);
 418         return info;
 419 }
 420
 421 void qxl_release_unmap(struct qxl_device *qdev,
 422                        struct qxl_release *release,
 423                        union qxl_release_info *info)
 424 {
 425         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 426         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 427         void *ptr;
 428
 429         ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
 430         qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
 431 }
 432
 433 void qxl_release_fence_buffer_objects(struct qxl_release *release)
 434 {
 435         struct ttm_buffer_object *bo;
 436         struct ttm_bo_global *glob;
 437         struct ttm_bo_device *bdev;
 438         struct ttm_bo_driver *driver;
 439         struct qxl_bo *qbo;
 440         struct ttm_validate_buffer *entry;
 441         struct qxl_device *qdev;
 442
 443         /* if only one object on the release its the release itself
 444            since these objects are pinned no need to reserve */
 445         if (list_is_singular(&release->bos) || list_empty(&release->bos))
 446                 return;
 447
 448         bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;
 449         bdev = bo->bdev;
 450         qdev = container_of(bdev, struct qxl_device, mman.bdev);
 451
 452         /*
 453          * Since we never really allocated a context and we don't want to conflict,
 454          * set the highest bits. This will break if we really allow exporting of dma-bufs.
 455          */
 456         dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock,
 457                        release->id | 0xf0000000, release->base.seqno);
 458         trace_dma_fence_emit(&release->base);
 459
 460         driver = bdev->driver;
 461         glob = bo->glob;
 462
 463         spin_lock(&glob->lru_lock);
 464
 465         list_for_each_entry(entry, &release->bos, head) {
 466                 bo = entry->bo;
 467                 qbo = to_qxl_bo(bo);
 468
 469                 reservation_object_add_shared_fence(bo->resv, &release->base);
 470                 ttm_bo_add_to_lru(bo);
 471                 reservation_object_unlock(bo->resv);
 472         }
 473         spin_unlock(&glob->lru_lock);
 474         ww_acquire_fini(&release->ticket);
 475 }
 476