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)
 129 {
 130         uint32_t flags = DRM_FREEDRENO_GEM_GPUREADONLY;
 131         struct fd_bo *bo = bo_new(dev, size, flags, &dev->ring_cache);
 132         if (bo)
 133                 bo->bo_reuse = RING_CACHE;
 134         fd_bo_set_name(bo, "cmdstream");
 135         return bo;
 136 }
 137
 138 struct fd_bo *
 139 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 140 {
 141         struct fd_bo *bo = NULL;
 142
 143         pthread_mutex_lock(&table_lock);
 144
 145         bo = lookup_bo(dev->handle_table, handle);
 146         if (bo)
 147                 goto out_unlock;
 148
 149         bo = bo_from_handle(dev, size, handle);
 150
 151         VG_BO_ALLOC(bo);
 152
 153 out_unlock:
 154         pthread_mutex_unlock(&table_lock);
 155
 156         return bo;
 157 }
 158
 159 struct fd_bo *
 160 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 161 {
 162         int ret, size;
 163         uint32_t handle;
 164         struct fd_bo *bo;
 165
 166         pthread_mutex_lock(&table_lock);
 167         ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 168         if (ret) {
 169                 pthread_mutex_unlock(&table_lock);
 170                 return NULL;
 171         }
 172
 173         bo = lookup_bo(dev->handle_table, handle);
 174         if (bo)
 175                 goto out_unlock;
 176
 177         /* lseek() to get bo size */
 178         size = lseek(fd, 0, SEEK_END);
 179         lseek(fd, 0, SEEK_CUR);
 180
 181         bo = bo_from_handle(dev, size, handle);
 182
 183         VG_BO_ALLOC(bo);
 184
 185 out_unlock:
 186         pthread_mutex_unlock(&table_lock);
 187
 188         return bo;
 189 }
 190
 191 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 192 {
 193         struct drm_gem_open req = {
 194                         .name = name,
 195         };
 196         struct fd_bo *bo;
 197
 198         pthread_mutex_lock(&table_lock);
 199
 200         /* check name table first, to see if bo is already open: */
 201         bo = lookup_bo(dev->name_table, name);
 202         if (bo)
 203                 goto out_unlock;
 204
 205         if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 206                 ERROR_MSG("gem-open failed: %s", strerror(errno));
 207                 goto out_unlock;
 208         }
 209
 210         bo = lookup_bo(dev->handle_table, req.handle);
 211         if (bo)
 212                 goto out_unlock;
 213
 214         bo = bo_from_handle(dev, req.size, req.handle);
 215         if (bo) {
 216                 set_name(bo, name);
 217                 VG_BO_ALLOC(bo);
 218         }
 219
 220 out_unlock:
 221         pthread_mutex_unlock(&table_lock);
 222
 223         return bo;
 224 }
 225
 226 uint64_t fd_bo_get_iova(struct fd_bo *bo)
 227 {
 228         if (!bo->iova)
 229                 bo->iova = bo->funcs->iova(bo);
 230         return bo->iova;
 231 }
 232
 233 void fd_bo_put_iova(struct fd_bo *bo)
 234 {
 235         /* currently a no-op */
 236 }
 237
 238 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 239 {
 240         p_atomic_inc(&bo->refcnt);
 241         return bo;
 242 }
 243
 244 void fd_bo_del(struct fd_bo *bo)
 245 {
 246         struct fd_device *dev = bo->dev;
 247
 248         if (!atomic_dec_and_test(&bo->refcnt))
 249                 return;
 250
 251         pthread_mutex_lock(&table_lock);
 252
 253         if ((bo->bo_reuse == BO_CACHE) && (fd_bo_cache_free(&dev->bo_cache, bo) == 0))
 254                 goto out;
 255         if ((bo->bo_reuse == RING_CACHE) && (fd_bo_cache_free(&dev->ring_cache, bo) == 0))
 256                 goto out;
 257
 258         bo_del(bo);
 259         fd_device_del_locked(dev);
 260 out:
 261         pthread_mutex_unlock(&table_lock);
 262 }
 263
 264 /* Called under table_lock */
 265 void bo_del(struct fd_bo *bo)
 266 {
 267         VG_BO_FREE(bo);
 268
 269         if (bo->map)
 270                 os_munmap(bo->map, bo->size);
 271
 272         /* TODO probably bo's in bucket list get removed from
 273          * handle table??
 274          */
 275
 276         if (bo->handle) {
 277                 struct drm_gem_close req = {
 278                                 .handle = bo->handle,
 279                 };
 280                 _mesa_hash_table_remove_key(bo->dev->handle_table, &bo->handle);
 281                 if (bo->name)
 282                         _mesa_hash_table_remove_key(bo->dev->name_table, &bo->name);
 283                 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 284         }
 285
 286         bo->funcs->destroy(bo);
 287 }
 288
 289 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 290 {
 291         if (!bo->name) {
 292                 struct drm_gem_flink req = {
 293                                 .handle = bo->handle,
 294                 };
 295                 int ret;
 296
 297                 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 298                 if (ret) {
 299                         return ret;
 300                 }
 301
 302                 pthread_mutex_lock(&table_lock);
 303                 set_name(bo, req.name);
 304                 pthread_mutex_unlock(&table_lock);
 305                 bo->bo_reuse = NO_CACHE;
 306         }
 307
 308         *name = bo->name;
 309
 310         return 0;
 311 }
 312
 313 uint32_t fd_bo_handle(struct fd_bo *bo)
 314 {
 315         return bo->handle;
 316 }
 317
 318 int fd_bo_dmabuf(struct fd_bo *bo)
 319 {
 320         int ret, prime_fd;
 321
 322         ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 323                         &prime_fd);
 324         if (ret) {
 325                 ERROR_MSG("failed to get dmabuf fd: %d", ret);
 326                 return ret;
 327         }
 328
 329         bo->bo_reuse = NO_CACHE;
 330
 331         return prime_fd;
 332 }
 333
 334 uint32_t fd_bo_size(struct fd_bo *bo)
 335 {
 336         return bo->size;
 337 }
 338
 339 void * fd_bo_map(struct fd_bo *bo)
 340 {
 341         if (!bo->map) {
 342                 uint64_t offset;
 343                 int ret;
 344
 345                 ret = bo->funcs->offset(bo, &offset);
 346                 if (ret) {
 347                         return NULL;
 348                 }
 349
 350                 bo->map = os_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 351                                 bo->dev->fd, offset);
 352                 if (bo->map == MAP_FAILED) {
 353                         ERROR_MSG("mmap failed: %s", strerror(errno));
 354                         bo->map = NULL;
 355                 }
 356         }
 357         return bo->map;
 358 }
 359
 360 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 361 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 362 {
 363         return bo->funcs->cpu_prep(bo, pipe, op);
 364 }
 365
 366 void fd_bo_cpu_fini(struct fd_bo *bo)
 367 {
 368         bo->funcs->cpu_fini(bo);
 369 }