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         bo->iova = bo->funcs->iova(bo);
  76
  77         p_atomic_set(&bo->refcnt, 1);
  78         list_inithead(&bo->list);
  79         /* add ourself into the handle table: */
  80         _mesa_hash_table_insert(dev->handle_table, &bo->handle, bo);
  81         return bo;
  82 }
  83
  84 static struct fd_bo *
  85 bo_new(struct fd_device *dev, uint32_t size, uint32_t flags,
  86                 struct fd_bo_cache *cache)
  87 {
  88         struct fd_bo *bo = NULL;
  89         uint32_t handle;
  90         int ret;
  91
  92         bo = fd_bo_cache_alloc(cache, &size, flags);
  93         if (bo)
  94                 return bo;
  95
  96         ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
  97         if (ret)
  98                 return NULL;
  99
 100         pthread_mutex_lock(&table_lock);
 101         bo = bo_from_handle(dev, size, handle);
 102         pthread_mutex_unlock(&table_lock);
 103
 104         VG_BO_ALLOC(bo);
 105
 106         return bo;
 107 }
 108
 109 struct fd_bo *
 110 _fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
 111 {
 112         struct fd_bo *bo = bo_new(dev, size, flags, &dev->bo_cache);
 113         if (bo)
 114                 bo->bo_reuse = BO_CACHE;
 115         return bo;
 116 }
 117
 118 void
 119 _fd_bo_set_name(struct fd_bo *bo, const char *fmt, va_list ap)
 120 {
 121         bo->funcs->set_name(bo, fmt, ap);
 122 }
 123
 124 /* internal function to allocate bo's that use the ringbuffer cache
 125  * instead of the normal bo_cache.  The purpose is, because cmdstream
 126  * bo's get vmap'd on the kernel side, and that is expensive, we want
 127  * to re-use cmdstream bo's for cmdstream and not unrelated purposes.
 128  */
 129 struct fd_bo *
 130 fd_bo_new_ring(struct fd_device *dev, uint32_t size)
 131 {
 132         uint32_t flags = DRM_FREEDRENO_GEM_GPUREADONLY;
 133         struct fd_bo *bo = bo_new(dev, size, flags, &dev->ring_cache);
 134         if (bo)
 135                 bo->bo_reuse = RING_CACHE;
 136         fd_bo_set_name(bo, "cmdstream");
 137         return bo;
 138 }
 139
 140 struct fd_bo *
 141 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 142 {
 143         struct fd_bo *bo = NULL;
 144
 145         pthread_mutex_lock(&table_lock);
 146
 147         bo = lookup_bo(dev->handle_table, handle);
 148         if (bo)
 149                 goto out_unlock;
 150
 151         bo = bo_from_handle(dev, size, handle);
 152
 153         VG_BO_ALLOC(bo);
 154
 155 out_unlock:
 156         pthread_mutex_unlock(&table_lock);
 157
 158         return bo;
 159 }
 160
 161 struct fd_bo *
 162 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 163 {
 164         int ret, size;
 165         uint32_t handle;
 166         struct fd_bo *bo;
 167
 168         pthread_mutex_lock(&table_lock);
 169         ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 170         if (ret) {
 171                 pthread_mutex_unlock(&table_lock);
 172                 return NULL;
 173         }
 174
 175         bo = lookup_bo(dev->handle_table, handle);
 176         if (bo)
 177                 goto out_unlock;
 178
 179         /* lseek() to get bo size */
 180         size = lseek(fd, 0, SEEK_END);
 181         lseek(fd, 0, SEEK_CUR);
 182
 183         bo = bo_from_handle(dev, size, handle);
 184
 185         VG_BO_ALLOC(bo);
 186
 187 out_unlock:
 188         pthread_mutex_unlock(&table_lock);
 189
 190         return bo;
 191 }
 192
 193 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 194 {
 195         struct drm_gem_open req = {
 196                         .name = name,
 197         };
 198         struct fd_bo *bo;
 199
 200         pthread_mutex_lock(&table_lock);
 201
 202         /* check name table first, to see if bo is already open: */
 203         bo = lookup_bo(dev->name_table, name);
 204         if (bo)
 205                 goto out_unlock;
 206
 207         if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 208                 ERROR_MSG("gem-open failed: %s", strerror(errno));
 209                 goto out_unlock;
 210         }
 211
 212         bo = lookup_bo(dev->handle_table, req.handle);
 213         if (bo)
 214                 goto out_unlock;
 215
 216         bo = bo_from_handle(dev, req.size, req.handle);
 217         if (bo) {
 218                 set_name(bo, name);
 219                 VG_BO_ALLOC(bo);
 220         }
 221
 222 out_unlock:
 223         pthread_mutex_unlock(&table_lock);
 224
 225         return bo;
 226 }
 227
 228 uint64_t fd_bo_get_iova(struct fd_bo *bo)
 229 {
 230         return bo->iova;
 231 }
 232
 233 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 234 {
 235         p_atomic_inc(&bo->refcnt);
 236         return bo;
 237 }
 238
 239 void fd_bo_del(struct fd_bo *bo)
 240 {
 241         struct fd_device *dev = bo->dev;
 242
 243         if (!atomic_dec_and_test(&bo->refcnt))
 244                 return;
 245
 246         pthread_mutex_lock(&table_lock);
 247
 248         if ((bo->bo_reuse == BO_CACHE) && (fd_bo_cache_free(&dev->bo_cache, bo) == 0))
 249                 goto out;
 250         if ((bo->bo_reuse == RING_CACHE) && (fd_bo_cache_free(&dev->ring_cache, bo) == 0))
 251                 goto out;
 252
 253         bo_del(bo);
 254         fd_device_del_locked(dev);
 255 out:
 256         pthread_mutex_unlock(&table_lock);
 257 }
 258
 259 /* Called under table_lock */
 260 void bo_del(struct fd_bo *bo)
 261 {
 262         VG_BO_FREE(bo);
 263
 264         if (bo->map)
 265                 os_munmap(bo->map, bo->size);
 266
 267         /* TODO probably bo's in bucket list get removed from
 268          * handle table??
 269          */
 270
 271         if (bo->handle) {
 272                 struct drm_gem_close req = {
 273                                 .handle = bo->handle,
 274                 };
 275                 _mesa_hash_table_remove_key(bo->dev->handle_table, &bo->handle);
 276                 if (bo->name)
 277                         _mesa_hash_table_remove_key(bo->dev->name_table, &bo->name);
 278                 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 279         }
 280
 281         bo->funcs->destroy(bo);
 282 }
 283
 284 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 285 {
 286         if (!bo->name) {
 287                 struct drm_gem_flink req = {
 288                                 .handle = bo->handle,
 289                 };
 290                 int ret;
 291
 292                 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 293                 if (ret) {
 294                         return ret;
 295                 }
 296
 297                 pthread_mutex_lock(&table_lock);
 298                 set_name(bo, req.name);
 299                 pthread_mutex_unlock(&table_lock);
 300                 bo->bo_reuse = NO_CACHE;
 301         }
 302
 303         *name = bo->name;
 304
 305         return 0;
 306 }
 307
 308 uint32_t fd_bo_handle(struct fd_bo *bo)
 309 {
 310         return bo->handle;
 311 }
 312
 313 int fd_bo_dmabuf(struct fd_bo *bo)
 314 {
 315         int ret, prime_fd;
 316
 317         ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 318                         &prime_fd);
 319         if (ret) {
 320                 ERROR_MSG("failed to get dmabuf fd: %d", ret);
 321                 return ret;
 322         }
 323
 324         bo->bo_reuse = NO_CACHE;
 325
 326         return prime_fd;
 327 }
 328
 329 uint32_t fd_bo_size(struct fd_bo *bo)
 330 {
 331         return bo->size;
 332 }
 333
 334 void * fd_bo_map(struct fd_bo *bo)
 335 {
 336         if (!bo->map) {
 337                 uint64_t offset;
 338                 int ret;
 339
 340                 ret = bo->funcs->offset(bo, &offset);
 341                 if (ret) {
 342                         return NULL;
 343                 }
 344
 345                 bo->map = os_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 346                                 bo->dev->fd, offset);
 347                 if (bo->map == MAP_FAILED) {
 348                         ERROR_MSG("mmap failed: %s", strerror(errno));
 349                         bo->map = NULL;
 350                 }
 351         }
 352         return bo->map;
 353 }
 354
 355 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 356 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 357 {
 358         return bo->funcs->cpu_prep(bo, pipe, op);
 359 }
 360
 361 void fd_bo_cpu_fini(struct fd_bo *bo)
 362 {
 363         bo->funcs->cpu_fini(bo);
 364 }