src/gallium/drivers/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 /* internal function to allocate bo's that use the ringbuffer cache
 117  * instead of the normal bo_cache.  The purpose is, because cmdstream
 118  * bo's get vmap'd on the kernel side, and that is expensive, we want
 119  * to re-use cmdstream bo's for cmdstream and not unrelated purposes.
 120  */
 121 struct fd_bo *
 122 fd_bo_new_ring(struct fd_device *dev, uint32_t size, uint32_t flags)
 123 {
 124         struct fd_bo *bo = bo_new(dev, size, flags, &dev->ring_cache);
 125         if (bo)
 126                 bo->bo_reuse = RING_CACHE;
 127         return bo;
 128 }
 129
 130 struct fd_bo *
 131 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 132 {
 133         struct fd_bo *bo = NULL;
 134
 135         pthread_mutex_lock(&table_lock);
 136
 137         bo = lookup_bo(dev->handle_table, handle);
 138         if (bo)
 139                 goto out_unlock;
 140
 141         bo = bo_from_handle(dev, size, handle);
 142
 143         VG_BO_ALLOC(bo);
 144
 145 out_unlock:
 146         pthread_mutex_unlock(&table_lock);
 147
 148         return bo;
 149 }
 150
 151 struct fd_bo *
 152 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 153 {
 154         int ret, size;
 155         uint32_t handle;
 156         struct fd_bo *bo;
 157
 158         pthread_mutex_lock(&table_lock);
 159         ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 160         if (ret) {
 161                 pthread_mutex_unlock(&table_lock);
 162                 return NULL;
 163         }
 164
 165         bo = lookup_bo(dev->handle_table, handle);
 166         if (bo)
 167                 goto out_unlock;
 168
 169         /* lseek() to get bo size */
 170         size = lseek(fd, 0, SEEK_END);
 171         lseek(fd, 0, SEEK_CUR);
 172
 173         bo = bo_from_handle(dev, size, handle);
 174
 175         VG_BO_ALLOC(bo);
 176
 177 out_unlock:
 178         pthread_mutex_unlock(&table_lock);
 179
 180         return bo;
 181 }
 182
 183 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 184 {
 185         struct drm_gem_open req = {
 186                         .name = name,
 187         };
 188         struct fd_bo *bo;
 189
 190         pthread_mutex_lock(&table_lock);
 191
 192         /* check name table first, to see if bo is already open: */
 193         bo = lookup_bo(dev->name_table, name);
 194         if (bo)
 195                 goto out_unlock;
 196
 197         if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 198                 ERROR_MSG("gem-open failed: %s", strerror(errno));
 199                 goto out_unlock;
 200         }
 201
 202         bo = lookup_bo(dev->handle_table, req.handle);
 203         if (bo)
 204                 goto out_unlock;
 205
 206         bo = bo_from_handle(dev, req.size, req.handle);
 207         if (bo) {
 208                 set_name(bo, name);
 209                 VG_BO_ALLOC(bo);
 210         }
 211
 212 out_unlock:
 213         pthread_mutex_unlock(&table_lock);
 214
 215         return bo;
 216 }
 217
 218 uint64_t fd_bo_get_iova(struct fd_bo *bo)
 219 {
 220         if (!bo->iova)
 221                 bo->iova = bo->funcs->iova(bo);
 222         return bo->iova;
 223 }
 224
 225 void fd_bo_put_iova(struct fd_bo *bo)
 226 {
 227         /* currently a no-op */
 228 }
 229
 230 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 231 {
 232         p_atomic_inc(&bo->refcnt);
 233         return bo;
 234 }
 235
 236 void fd_bo_del(struct fd_bo *bo)
 237 {
 238         struct fd_device *dev = bo->dev;
 239
 240         if (!atomic_dec_and_test(&bo->refcnt))
 241                 return;
 242
 243         pthread_mutex_lock(&table_lock);
 244
 245         if ((bo->bo_reuse == BO_CACHE) && (fd_bo_cache_free(&dev->bo_cache, bo) == 0))
 246                 goto out;
 247         if ((bo->bo_reuse == RING_CACHE) && (fd_bo_cache_free(&dev->ring_cache, bo) == 0))
 248                 goto out;
 249
 250         bo_del(bo);
 251         fd_device_del_locked(dev);
 252 out:
 253         pthread_mutex_unlock(&table_lock);
 254 }
 255
 256 /* Called under table_lock */
 257 void bo_del(struct fd_bo *bo)
 258 {
 259         VG_BO_FREE(bo);
 260
 261         if (bo->map)
 262                 os_munmap(bo->map, bo->size);
 263
 264         /* TODO probably bo's in bucket list get removed from
 265          * handle table??
 266          */
 267
 268         if (bo->handle) {
 269                 struct drm_gem_close req = {
 270                                 .handle = bo->handle,
 271                 };
 272                 _mesa_hash_table_remove_key(bo->dev->handle_table, &bo->handle);
 273                 if (bo->name)
 274                         _mesa_hash_table_remove_key(bo->dev->name_table, &bo->name);
 275                 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 276         }
 277
 278         bo->funcs->destroy(bo);
 279 }
 280
 281 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 282 {
 283         if (!bo->name) {
 284                 struct drm_gem_flink req = {
 285                                 .handle = bo->handle,
 286                 };
 287                 int ret;
 288
 289                 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 290                 if (ret) {
 291                         return ret;
 292                 }
 293
 294                 pthread_mutex_lock(&table_lock);
 295                 set_name(bo, req.name);
 296                 pthread_mutex_unlock(&table_lock);
 297                 bo->bo_reuse = NO_CACHE;
 298         }
 299
 300         *name = bo->name;
 301
 302         return 0;
 303 }
 304
 305 uint32_t fd_bo_handle(struct fd_bo *bo)
 306 {
 307         return bo->handle;
 308 }
 309
 310 int fd_bo_dmabuf(struct fd_bo *bo)
 311 {
 312         int ret, prime_fd;
 313
 314         ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 315                         &prime_fd);
 316         if (ret) {
 317                 ERROR_MSG("failed to get dmabuf fd: %d", ret);
 318                 return ret;
 319         }
 320
 321         bo->bo_reuse = NO_CACHE;
 322
 323         return prime_fd;
 324 }
 325
 326 uint32_t fd_bo_size(struct fd_bo *bo)
 327 {
 328         return bo->size;
 329 }
 330
 331 void * fd_bo_map(struct fd_bo *bo)
 332 {
 333         if (!bo->map) {
 334                 uint64_t offset;
 335                 int ret;
 336
 337                 ret = bo->funcs->offset(bo, &offset);
 338                 if (ret) {
 339                         return NULL;
 340                 }
 341
 342                 bo->map = os_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 343                                 bo->dev->fd, offset);
 344                 if (bo->map == MAP_FAILED) {
 345                         ERROR_MSG("mmap failed: %s", strerror(errno));
 346                         bo->map = NULL;
 347                 }
 348         }
 349         return bo->map;
 350 }
 351
 352 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 353 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 354 {
 355         return bo->funcs->cpu_prep(bo, pipe, op);
 356 }
 357
 358 void fd_bo_cpu_fini(struct fd_bo *bo)
 359 {
 360         bo->funcs->cpu_fini(bo);
 361 }