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