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 uint64_t
  42 qxl_release_alloc(struct qxl_device *qdev, int type,
  43                   struct qxl_release **ret)
  44 {
  45         struct qxl_release *release;
  46         int handle = 0;
  47         size_t size = sizeof(*release);
  48         int idr_ret;
  49
  50         release = kmalloc(size, GFP_KERNEL);
  51         if (!release) {
  52                 DRM_ERROR("Out of memory\n");
  53                 return 0;
  54         }
  55         release->type = type;
  56         release->bo_count = 0;
  57         release->release_offset = 0;
  58         release->surface_release_id = 0;
  59 again:
  60         if (idr_pre_get(&qdev->release_idr, GFP_KERNEL) == 0) {
  61                 DRM_ERROR("Out of memory for release idr\n");
  62                 kfree(release);
  63                 goto release_fail;
  64         }
  65         spin_lock(&qdev->release_idr_lock);
  66         idr_ret = idr_get_new_above(&qdev->release_idr, release, 1, &handle);
  67         spin_unlock(&qdev->release_idr_lock);
  68         if (idr_ret == -EAGAIN)
  69                 goto again;
  70         if (ret)
  71                 *ret = release;
  72         QXL_INFO(qdev, "allocated release %lld\n", handle);
  73         release->id = handle;
  74 release_fail:
  75
  76         return handle;
  77 }
  78
  79 void
  80 qxl_release_free(struct qxl_device *qdev,
  81                  struct qxl_release *release)
  82 {
  83         int i;
  84
  85         QXL_INFO(qdev, "release %d, type %d, %d bos\n", release->id,
  86                  release->type, release->bo_count);
  87
  88         if (release->surface_release_id)
  89                 qxl_surface_id_dealloc(qdev, release->surface_release_id);
  90
  91         for (i = 0 ; i < release->bo_count; ++i) {
  92                 QXL_INFO(qdev, "release %llx\n",
  93                         release->bos[i]->tbo.addr_space_offset
  94                                                 - DRM_FILE_OFFSET);
  95                 qxl_fence_remove_release(&release->bos[i]->fence, release->id);
  96                 qxl_bo_unref(&release->bos[i]);
  97         }
  98         spin_lock(&qdev->release_idr_lock);
  99         idr_remove(&qdev->release_idr, release->id);
 100         spin_unlock(&qdev->release_idr_lock);
 101         kfree(release);
 102 }
 103
 104 void
 105 qxl_release_add_res(struct qxl_device *qdev, struct qxl_release *release,
 106                     struct qxl_bo *bo)
 107 {
 108         int i;
 109         for (i = 0; i < release->bo_count; i++)
 110                 if (release->bos[i] == bo)
 111                         return;
 112
 113         if (release->bo_count >= QXL_MAX_RES) {
 114                 DRM_ERROR("exceeded max resource on a qxl_release item\n");
 115                 return;
 116         }
 117         release->bos[release->bo_count++] = qxl_bo_ref(bo);
 118 }
 119
 120 static int qxl_release_bo_alloc(struct qxl_device *qdev,
 121                                 struct qxl_bo **bo)
 122 {
 123         int ret;
 124         ret = qxl_bo_create(qdev, PAGE_SIZE, false, QXL_GEM_DOMAIN_VRAM, NULL,
 125                             bo);
 126         return ret;
 127 }
 128
 129 int qxl_release_reserve(struct qxl_device *qdev,
 130                         struct qxl_release *release, bool no_wait)
 131 {
 132         int ret;
 133         if (atomic_inc_return(&release->bos[0]->reserve_count) == 1) {
 134                 ret = qxl_bo_reserve(release->bos[0], no_wait);
 135                 if (ret)
 136                         return ret;
 137         }
 138         return 0;
 139 }
 140
 141 void qxl_release_unreserve(struct qxl_device *qdev,
 142                           struct qxl_release *release)
 143 {
 144         if (atomic_dec_and_test(&release->bos[0]->reserve_count))
 145                 qxl_bo_unreserve(release->bos[0]);
 146 }
 147
 148 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,
 149                                        enum qxl_surface_cmd_type surface_cmd_type,
 150                                        struct qxl_release *create_rel,
 151                                        struct qxl_release **release)
 152 {
 153         int ret;
 154
 155         if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {
 156                 int idr_ret;
 157                 struct qxl_bo *bo;
 158                 union qxl_release_info *info;
 159
 160                 /* stash the release after the create command */
 161                 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);
 162                 bo = qxl_bo_ref(create_rel->bos[0]);
 163
 164                 (*release)->release_offset = create_rel->release_offset + 64;
 165
 166                 qxl_release_add_res(qdev, *release, bo);
 167
 168                 ret = qxl_release_reserve(qdev, *release, false);
 169                 if (ret) {
 170                         DRM_ERROR("release reserve failed\n");
 171                         goto out_unref;
 172                 }
 173                 info = qxl_release_map(qdev, *release);
 174                 info->id = idr_ret;
 175                 qxl_release_unmap(qdev, *release, info);
 176
 177
 178 out_unref:
 179                 qxl_bo_unref(&bo);
 180                 return ret;
 181         }
 182
 183         return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),
 184                                          QXL_RELEASE_SURFACE_CMD, release, NULL);
 185 }
 186
 187 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 188                                        int type, struct qxl_release **release,
 189                                        struct qxl_bo **rbo)
 190 {
 191         struct qxl_bo *bo;
 192         int idr_ret;
 193         int ret;
 194         union qxl_release_info *info;
 195         int cur_idx;
 196
 197         if (type == QXL_RELEASE_DRAWABLE)
 198                 cur_idx = 0;
 199         else if (type == QXL_RELEASE_SURFACE_CMD)
 200                 cur_idx = 1;
 201         else if (type == QXL_RELEASE_CURSOR_CMD)
 202                 cur_idx = 2;
 203         else {
 204                 DRM_ERROR("got illegal type: %d\n", type);
 205                 return -EINVAL;
 206         }
 207
 208         idr_ret = qxl_release_alloc(qdev, type, release);
 209
 210         mutex_lock(&qdev->release_mutex);
 211         if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
 212                 qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
 213                 qdev->current_release_bo_offset[cur_idx] = 0;
 214                 qdev->current_release_bo[cur_idx] = NULL;
 215         }
 216         if (!qdev->current_release_bo[cur_idx]) {
 217                 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
 218                 if (ret) {
 219                         mutex_unlock(&qdev->release_mutex);
 220                         return ret;
 221                 }
 222
 223                 /* pin releases bo's they are too messy to evict */
 224                 ret = qxl_bo_reserve(qdev->current_release_bo[cur_idx], false);
 225                 qxl_bo_pin(qdev->current_release_bo[cur_idx], QXL_GEM_DOMAIN_VRAM, NULL);
 226                 qxl_bo_unreserve(qdev->current_release_bo[cur_idx]);
 227         }
 228
 229         bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
 230
 231         (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];
 232         qdev->current_release_bo_offset[cur_idx]++;
 233
 234         if (rbo)
 235                 *rbo = bo;
 236
 237         qxl_release_add_res(qdev, *release, bo);
 238
 239         ret = qxl_release_reserve(qdev, *release, false);
 240         mutex_unlock(&qdev->release_mutex);
 241         if (ret)
 242                 goto out_unref;
 243
 244         info = qxl_release_map(qdev, *release);
 245         info->id = idr_ret;
 246         qxl_release_unmap(qdev, *release, info);
 247
 248 out_unref:
 249         qxl_bo_unref(&bo);
 250         return ret;
 251 }
 252
 253 int qxl_fence_releaseable(struct qxl_device *qdev,
 254                           struct qxl_release *release)
 255 {
 256         int i, ret;
 257         for (i = 0; i < release->bo_count; i++) {
 258                 if (!release->bos[i]->tbo.sync_obj)
 259                         release->bos[i]->tbo.sync_obj = &release->bos[i]->fence;
 260                 ret = qxl_fence_add_release(&release->bos[i]->fence, release->id);
 261                 if (ret)
 262                         return ret;
 263         }
 264         return 0;
 265 }
 266
 267 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,
 268                                                    uint64_t id)
 269 {
 270         struct qxl_release *release;
 271
 272         spin_lock(&qdev->release_idr_lock);
 273         release = idr_find(&qdev->release_idr, id);
 274         spin_unlock(&qdev->release_idr_lock);
 275         if (!release) {
 276                 DRM_ERROR("failed to find id in release_idr\n");
 277                 return NULL;
 278         }
 279         if (release->bo_count < 1) {
 280                 DRM_ERROR("read a released resource with 0 bos\n");
 281                 return NULL;
 282         }
 283         return release;
 284 }
 285
 286 union qxl_release_info *qxl_release_map(struct qxl_device *qdev,
 287                                         struct qxl_release *release)
 288 {
 289         void *ptr;
 290         union qxl_release_info *info;
 291         struct qxl_bo *bo = release->bos[0];
 292
 293         ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
 294         info = ptr + (release->release_offset & ~PAGE_SIZE);
 295         return info;
 296 }
 297
 298 void qxl_release_unmap(struct qxl_device *qdev,
 299                        struct qxl_release *release,
 300                        union qxl_release_info *info)
 301 {
 302         struct qxl_bo *bo = release->bos[0];
 303         void *ptr;
 304
 305         ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
 306         qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
 307 }