Pileus Git - ~andy/linux/blob - 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         }
  96         spin_lock(&qdev->release_idr_lock);
  97         idr_remove(&qdev->release_idr, release->id);
  98         spin_unlock(&qdev->release_idr_lock);
  99         kfree(release);
 100 }
 101
 102 static int qxl_release_bo_alloc(struct qxl_device *qdev,
 103                                 struct qxl_bo **bo)
 104 {
 105         int ret;
 106         /* pin releases bo's they are too messy to evict */
 107         ret = qxl_bo_create(qdev, PAGE_SIZE, false, true,
 108                             QXL_GEM_DOMAIN_VRAM, NULL,
 109                             bo);
 110         return ret;
 111 }
 112
 113 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
 114 {
 115         struct qxl_bo_list *entry;
 116
 117         list_for_each_entry(entry, &release->bos, tv.head) {
 118                 if (entry->tv.bo == &bo->tbo)
 119                         return 0;
 120         }
 121
 122         entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
 123         if (!entry)
 124                 return -ENOMEM;
 125
 126         qxl_bo_ref(bo);
 127         entry->tv.bo = &bo->tbo;
 128         list_add_tail(&entry->tv.head, &release->bos);
 129         return 0;
 130 }
 131
 132 static int qxl_release_validate_bo(struct qxl_bo *bo)
 133 {
 134         int ret;
 135
 136         if (!bo->pin_count) {
 137                 qxl_ttm_placement_from_domain(bo, bo->type, false);
 138                 ret = ttm_bo_validate(&bo->tbo, &bo->placement,
 139                                       true, false);
 140                 if (ret)
 141                         return ret;
 142         }
 143
 144         /* allocate a surface for reserved + validated buffers */
 145         ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
 146         if (ret)
 147                 return ret;
 148         return 0;
 149 }
 150
 151 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)
 152 {
 153         int ret;
 154         struct qxl_bo_list *entry;
 155
 156         /* if only one object on the release its the release itself
 157            since these objects are pinned no need to reserve */
 158         if (list_is_singular(&release->bos))
 159                 return 0;
 160
 161         ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos);
 162         if (ret)
 163                 return ret;
 164
 165         list_for_each_entry(entry, &release->bos, tv.head) {
 166                 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 167
 168                 ret = qxl_release_validate_bo(bo);
 169                 if (ret) {
 170                         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 171                         return ret;
 172                 }
 173         }
 174         return 0;
 175 }
 176
 177 void qxl_release_backoff_reserve_list(struct qxl_release *release)
 178 {
 179         /* if only one object on the release its the release itself
 180            since these objects are pinned no need to reserve */
 181         if (list_is_singular(&release->bos))
 182                 return;
 183
 184         ttm_eu_backoff_reservation(&release->ticket, &release->bos);
 185 }
 186
 187
 188 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
 189                                        enum qxl_surface_cmd_type surface_cmd_type,
 190                                        struct qxl_release *create_rel,
 191                                        struct qxl_release **release)
 192 {
 193         if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
 194                 int idr_ret;
 195                 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
 196                 struct qxl_bo *bo;
 197                 union qxl_release_info *info;
 198
 199                 /* stash the release after the create command */
 200                 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
 201                 bo = qxl_bo_ref(to_qxl_bo(entry->tv.bo));
 202
 203                 (*release)->release_offset = create_rel->release_offset + 64;
 204
 205                 qxl_release_list_add(*release, bo);
 206
 207                 info = qxl_release_map(qdev, *release);
 208                 info->id = idr_ret;
 209                 qxl_release_unmap(qdev, *release, info);
 210
 211                 qxl_bo_unref(&bo);
 212                 return 0;
 213         }
 214
 215         return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
 216                                          QXL_RELEASE_SURFACE_CMD, release, NULL);
 217 }
 218
 219 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 220                                        int type, struct qxl_release **release,
 221                                        struct qxl_bo **rbo)
 222 {
 223         struct qxl_bo *bo;
 224         int idr_ret;
 225         int ret = 0;
 226         union qxl_release_info *info;
 227         int cur_idx;
 228
 229         if (type == QXL_RELEASE_DRAWABLE)
 230                 cur_idx = 0;
 231         else if (type == QXL_RELEASE_SURFACE_CMD)
 232                 cur_idx = 1;
 233         else if (type == QXL_RELEASE_CURSOR_CMD)
 234                 cur_idx = 2;
 235         else {
 236                 DRM_ERROR("got illegal type: %d\n", type);
 237                 return -EINVAL;
 238         }
 239
 240         idr_ret = qxl_release_alloc(qdev, type, release);
 241
 242         mutex_lock(&qdev->release_mutex);
 243         if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
 244                 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
 245                 qdev->current_release_bo_offset[cur_idx] = 0;
 246                 qdev->current_release_bo[cur_idx] = NULL;
 247         }
 248         if (!qdev->current_release_bo[cur_idx]) {
 249                 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
 250                 if (ret) {
 251                         mutex_unlock(&qdev->release_mutex);
 252                         return ret;
 253                 }
 254         }
 255
 256         bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
 257
 258         (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
 259         qdev->current_release_bo_offset[cur_idx]++;
 260
 261         if (rbo)
 262                 *rbo = bo;
 263
 264         mutex_unlock(&qdev->release_mutex);
 265
 266         qxl_release_list_add(*release, bo);
 267
 268         info = qxl_release_map(qdev, *release);
 269         info->id = idr_ret;
 270         qxl_release_unmap(qdev, *release, info);
 271
 272         qxl_bo_unref(&bo);
 273         return ret;
 274 }
 275
 276 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
 277                                                    uint64_t id)
 278 {
 279         struct qxl_release *release;
 280
 281         spin_lock(&qdev->release_idr_lock);
 282         release = idr_find(&qdev->release_idr, id);
 283         spin_unlock(&qdev->release_idr_lock);
 284         if (!release) {
 285                 DRM_ERROR("failed to find id in release_idr\n");
 286                 return NULL;
 287         }
 288
 289         return release;
 290 }
 291
 292 union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
 293                                         struct qxl_release *release)
 294 {
 295         void *ptr;
 296         union qxl_release_info *info;
 297         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 298         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 299
 300         ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
 301         if (!ptr)
 302                 return NULL;
 303         info = ptr + (release->release_offset & ~PAGE_SIZE);
 304         return info;
 305 }
 306
 307 void qxl_release_unmap(struct qxl_device *qdev,
 308                        struct qxl_release *release,
 309                        union qxl_release_info *info)
 310 {
 311         struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
 312         struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
 313         void *ptr;
 314
 315         ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
 316         qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
 317 }
 318
 319 void qxl_release_fence_buffer_objects(struct qxl_release *release)
 320 {
 321         struct ttm_validate_buffer *entry;
 322         struct ttm_buffer_object *bo;
 323         struct ttm_bo_global *glob;
 324         struct ttm_bo_device *bdev;
 325         struct ttm_bo_driver *driver;
 326         struct qxl_bo *qbo;
 327
 328         /* if only one object on the release its the release itself
 329            since these objects are pinned no need to reserve */
 330         if (list_is_singular(&release->bos))
 331                 return;
 332
 333         bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;
 334         bdev = bo->bdev;
 335         driver = bdev->driver;
 336         glob = bo->glob;
 337
 338         spin_lock(&glob->lru_lock);
 339         spin_lock(&bdev->fence_lock);
 340
 341         list_for_each_entry(entry, &release->bos, head) {
 342                 bo = entry->bo;
 343                 qbo = to_qxl_bo(bo);
 344
 345                 if (!entry->bo->sync_obj)
 346                         entry->bo->sync_obj = &qbo->fence;
 347
 348                 qxl_fence_add_release_locked(&qbo->fence, release->id);
 349
 350                 ttm_bo_add_to_lru(bo);
 351                 ww_mutex_unlock(&bo->resv->lock);
 352                 entry->reserved = false;
 353         }
 354         spin_unlock(&bdev->fence_lock);
 355         spin_unlock(&glob->lru_lock);
 356         ww_acquire_fini(&release->ticket);
 357 }
 358