src/freedreno/drm/freedreno_bo.c

   1 /*
   2  * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27 #include "os/os_mman.h"
  28
  29 #include "freedreno_drmif.h"
  30 #include "freedreno_priv.h"
  31
  32 pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
  33 void bo_del(struct fd_bo *bo);
  34
  35 /* set buffer name, and add to table, call w/ table_lock held: */
  36 static void set_name(struct fd_bo *bo, uint32_t name)
  37 {
  38         bo->name = name;
  39         /* add ourself into the handle table: */
  40         _mesa_hash_table_insert(bo->dev->name_table, &bo->name, bo);
  41 }
  42
  43 /* lookup a buffer, call w/ table_lock held: */
  44 static struct fd_bo * lookup_bo(struct hash_table *tbl, uint32_t key)
  45 {
  46         struct fd_bo *bo = NULL;
  47         struct hash_entry *entry = _mesa_hash_table_search(tbl, &key);
  48         if (entry) {
  49                 /* found, incr refcnt and return: */
  50                 bo = fd_bo_ref(entry->data);
  51
  52                 /* don't break the bucket if this bo was found in one */
  53                 list_delinit(&bo->list);
  54         }
  55         return bo;
  56 }
  57
  58 /* allocate a new buffer object, call w/ table_lock held */
  59 static struct fd_bo * bo_from_handle(struct fd_device *dev,
  60                 uint32_t size, uint32_t handle)
  61 {
  62         struct fd_bo *bo;
  63
  64         bo = dev->funcs->bo_from_handle(dev, size, handle);
  65         if (!bo) {
  66                 struct drm_gem_close req = {
  67                                 .handle = handle,
  68                 };
  69                 drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
  70                 return NULL;
  71         }
  72         bo->dev = fd_device_ref(dev);
  73         bo->size = size;
  74         bo->handle = handle;
  75         p_atomic_set(&bo->refcnt, 1);
  76         list_inithead(&bo->list);
  77         /* add ourself into the handle table: */
  78         _mesa_hash_table_insert(dev->handle_table, &bo->handle, bo);
  79         return bo;
  80 }
  81
  82 static struct fd_bo *
  83 bo_new(struct fd_device *dev, uint32_t size, uint32_t flags,
  84                 struct fd_bo_cache *cache)
  85 {
  86         struct fd_bo *bo = NULL;
  87         uint32_t handle;
  88         int ret;
  89
  90         bo = fd_bo_cache_alloc(cache, &size, flags);
  91         if (bo)
  92                 return bo;
  93
  94         ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
  95         if (ret)
  96                 return NULL;
  97
  98         pthread_mutex_lock(&table_lock);
  99         bo = bo_from_handle(dev, size, handle);
 100         pthread_mutex_unlock(&table_lock);
 101
 102         VG_BO_ALLOC(bo);
 103
 104         return bo;
 105 }
 106
 107 struct fd_bo *
 108 _fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
 109 {
 110         struct fd_bo *bo = bo_new(dev, size, flags, &dev->bo_cache);
 111         if (bo)
 112                 bo->bo_reuse = BO_CACHE;
 113         return bo;
 114 }
 115
 116 void
 117 _fd_bo_set_name(struct fd_bo *bo, const char *fmt, va_list ap)
 118 {
 119         bo->funcs->set_name(bo, fmt, ap);
 120 }
 121
 122 /* internal function to allocate bo's that use the ringbuffer cache
 123  * instead of the normal bo_cache.  The purpose is, because cmdstream
 124  * bo's get vmap'd on the kernel side, and that is expensive, we want
 125  * to re-use cmdstream bo's for cmdstream and not unrelated purposes.
 126  */
 127 struct fd_bo *
 128 fd_bo_new_ring(struct fd_device *dev, uint32_t size, uint32_t flags)
 129 {
 130         struct fd_bo *bo = bo_new(dev, size, flags, &dev->ring_cache);
 131         if (bo)
 132                 bo->bo_reuse = RING_CACHE;
 133         fd_bo_set_name(bo, "cmdstream");
 134         return bo;
 135 }
 136
 137 struct fd_bo *
 138 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 139 {
 140         struct fd_bo *bo = NULL;
 141
 142         pthread_mutex_lock(&table_lock);
 143
 144         bo = lookup_bo(dev->handle_table, handle);
 145         if (bo)
 146                 goto out_unlock;
 147
 148         bo = bo_from_handle(dev, size, handle);
 149
 150         VG_BO_ALLOC(bo);
 151
 152 out_unlock:
 153         pthread_mutex_unlock(&table_lock);
 154
 155         return bo;
 156 }
 157
 158 struct fd_bo *
 159 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 160 {
 161         int ret, size;
 162         uint32_t handle;
 163         struct fd_bo *bo;
 164
 165         pthread_mutex_lock(&table_lock);
 166         ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 167         if (ret) {
 168                 pthread_mutex_unlock(&table_lock);
 169                 return NULL;
 170         }
 171
 172         bo = lookup_bo(dev->handle_table, handle);
 173         if (bo)
 174                 goto out_unlock;
 175
 176         /* lseek() to get bo size */
 177         size = lseek(fd, 0, SEEK_END);
 178         lseek(fd, 0, SEEK_CUR);
 179
 180         bo = bo_from_handle(dev, size, handle);
 181
 182         VG_BO_ALLOC(bo);
 183
 184 out_unlock:
 185         pthread_mutex_unlock(&table_lock);
 186
 187         return bo;
 188 }
 189
 190 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 191 {
 192         struct drm_gem_open req = {
 193                         .name = name,
 194         };
 195         struct fd_bo *bo;
 196
 197         pthread_mutex_lock(&table_lock);
 198
 199         /* check name table first, to see if bo is already open: */
 200         bo = lookup_bo(dev->name_table, name);
 201         if (bo)
 202                 goto out_unlock;
 203
 204         if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 205                 ERROR_MSG("gem-open failed: %s", strerror(errno));
 206                 goto out_unlock;
 207         }
 208
 209         bo = lookup_bo(dev->handle_table, req.handle);
 210         if (bo)
 211                 goto out_unlock;
 212
 213         bo = bo_from_handle(dev, req.size, req.handle);
 214         if (bo) {
 215                 set_name(bo, name);
 216                 VG_BO_ALLOC(bo);
 217         }
 218
 219 out_unlock:
 220         pthread_mutex_unlock(&table_lock);
 221
 222         return bo;
 223 }
 224
 225 uint64_t fd_bo_get_iova(struct fd_bo *bo)
 226 {
 227         if (!bo->iova)
 228                 bo->iova = bo->funcs->iova(bo);
 229         return bo->iova;
 230 }
 231
 232 void fd_bo_put_iova(struct fd_bo *bo)
 233 {
 234         /* currently a no-op */
 235 }
 236
 237 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 238 {
 239         p_atomic_inc(&bo->refcnt);
 240         return bo;
 241 }
 242
 243 void fd_bo_del(struct fd_bo *bo)
 244 {
 245         struct fd_device *dev = bo->dev;
 246
 247         if (!atomic_dec_and_test(&bo->refcnt))
 248                 return;
 249
 250         pthread_mutex_lock(&table_lock);
 251
 252         if ((bo->bo_reuse == BO_CACHE) && (fd_bo_cache_free(&dev->bo_cache, bo) == 0))
 253                 goto out;
 254         if ((bo->bo_reuse == RING_CACHE) && (fd_bo_cache_free(&dev->ring_cache, bo) == 0))
 255                 goto out;
 256
 257         bo_del(bo);
 258         fd_device_del_locked(dev);
 259 out:
 260         pthread_mutex_unlock(&table_lock);
 261 }
 262
 263 /* Called under table_lock */
 264 void bo_del(struct fd_bo *bo)
 265 {
 266         VG_BO_FREE(bo);
 267
 268         if (bo->map)
 269                 os_munmap(bo->map, bo->size);
 270
 271         /* TODO probably bo's in bucket list get removed from
 272          * handle table??
 273          */
 274
 275         if (bo->handle) {
 276                 struct drm_gem_close req = {
 277                                 .handle = bo->handle,
 278                 };
 279                 _mesa_hash_table_remove_key(bo->dev->handle_table, &bo->handle);
 280                 if (bo->name)
 281                         _mesa_hash_table_remove_key(bo->dev->name_table, &bo->name);
 282                 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 283         }
 284
 285         bo->funcs->destroy(bo);
 286 }
 287
 288 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 289 {
 290         if (!bo->name) {
 291                 struct drm_gem_flink req = {
 292                                 .handle = bo->handle,
 293                 };
 294                 int ret;
 295
 296                 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 297                 if (ret) {
 298                         return ret;
 299                 }
 300
 301                 pthread_mutex_lock(&table_lock);
 302                 set_name(bo, req.name);
 303                 pthread_mutex_unlock(&table_lock);
 304                 bo->bo_reuse = NO_CACHE;
 305         }
 306
 307         *name = bo->name;
 308
 309         return 0;
 310 }
 311
 312 uint32_t fd_bo_handle(struct fd_bo *bo)
 313 {
 314         return bo->handle;
 315 }
 316
 317 int fd_bo_dmabuf(struct fd_bo *bo)
 318 {
 319         int ret, prime_fd;
 320
 321         ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 322                         &prime_fd);
 323         if (ret) {
 324                 ERROR_MSG("failed to get dmabuf fd: %d", ret);
 325                 return ret;
 326         }
 327
 328         bo->bo_reuse = NO_CACHE;
 329
 330         return prime_fd;
 331 }
 332
 333 uint32_t fd_bo_size(struct fd_bo *bo)
 334 {
 335         return bo->size;
 336 }
 337
 338 void * fd_bo_map(struct fd_bo *bo)
 339 {
 340         if (!bo->map) {
 341                 uint64_t offset;
 342                 int ret;
 343
 344                 ret = bo->funcs->offset(bo, &offset);
 345                 if (ret) {
 346                         return NULL;
 347                 }
 348
 349                 bo->map = os_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 350                                 bo->dev->fd, offset);
 351                 if (bo->map == MAP_FAILED) {
 352                         ERROR_MSG("mmap failed: %s", strerror(errno));
 353                         bo->map = NULL;
 354                 }
 355         }
 356         return bo->map;
 357 }
 358
 359 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 360 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 361 {
 362         return bo->funcs->cpu_prep(bo, pipe, op);
 363 }
 364
 365 void fd_bo_cpu_fini(struct fd_bo *bo)
 366 {
 367         bo->funcs->cpu_fini(bo);
 368 }