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         bo->flags = FD_RELOC_FLAGS_INIT;
  77
  78         p_atomic_set(&bo->refcnt, 1);
  79         list_inithead(&bo->list);
  80         /* add ourself into the handle table: */
  81         _mesa_hash_table_insert(dev->handle_table, &bo->handle, bo);
  82         return bo;
  83 }
  84
  85 static struct fd_bo *
  86 bo_new(struct fd_device *dev, uint32_t size, uint32_t flags,
  87                 struct fd_bo_cache *cache)
  88 {
  89         struct fd_bo *bo = NULL;
  90         uint32_t handle;
  91         int ret;
  92
  93         bo = fd_bo_cache_alloc(cache, &size, flags);
  94         if (bo)
  95                 return bo;
  96
  97         ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
  98         if (ret)
  99                 return NULL;
 100
 101         pthread_mutex_lock(&table_lock);
 102         bo = bo_from_handle(dev, size, handle);
 103         pthread_mutex_unlock(&table_lock);
 104
 105         VG_BO_ALLOC(bo);
 106
 107         return bo;
 108 }
 109
 110 struct fd_bo *
 111 _fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
 112 {
 113         struct fd_bo *bo = bo_new(dev, size, flags, &dev->bo_cache);
 114         if (bo)
 115                 bo->bo_reuse = BO_CACHE;
 116         return bo;
 117 }
 118
 119 void
 120 _fd_bo_set_name(struct fd_bo *bo, const char *fmt, va_list ap)
 121 {
 122         bo->funcs->set_name(bo, fmt, ap);
 123 }
 124
 125 /* internal function to allocate bo's that use the ringbuffer cache
 126  * instead of the normal bo_cache.  The purpose is, because cmdstream
 127  * bo's get vmap'd on the kernel side, and that is expensive, we want
 128  * to re-use cmdstream bo's for cmdstream and not unrelated purposes.
 129  */
 130 struct fd_bo *
 131 fd_bo_new_ring(struct fd_device *dev, uint32_t size)
 132 {
 133         uint32_t flags = DRM_FREEDRENO_GEM_GPUREADONLY;
 134         struct fd_bo *bo = bo_new(dev, size, flags, &dev->ring_cache);
 135         if (bo)
 136                 bo->bo_reuse = RING_CACHE;
 137         fd_bo_set_name(bo, "cmdstream");
 138         return bo;
 139 }
 140
 141 struct fd_bo *
 142 fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 143 {
 144         struct fd_bo *bo = NULL;
 145
 146         pthread_mutex_lock(&table_lock);
 147
 148         bo = lookup_bo(dev->handle_table, handle);
 149         if (bo)
 150                 goto out_unlock;
 151
 152         bo = bo_from_handle(dev, size, handle);
 153
 154         VG_BO_ALLOC(bo);
 155
 156 out_unlock:
 157         pthread_mutex_unlock(&table_lock);
 158
 159         return bo;
 160 }
 161
 162 struct fd_bo *
 163 fd_bo_from_dmabuf(struct fd_device *dev, int fd)
 164 {
 165         int ret, size;
 166         uint32_t handle;
 167         struct fd_bo *bo;
 168
 169         pthread_mutex_lock(&table_lock);
 170         ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
 171         if (ret) {
 172                 pthread_mutex_unlock(&table_lock);
 173                 return NULL;
 174         }
 175
 176         bo = lookup_bo(dev->handle_table, handle);
 177         if (bo)
 178                 goto out_unlock;
 179
 180         /* lseek() to get bo size */
 181         size = lseek(fd, 0, SEEK_END);
 182         lseek(fd, 0, SEEK_CUR);
 183
 184         bo = bo_from_handle(dev, size, handle);
 185
 186         VG_BO_ALLOC(bo);
 187
 188 out_unlock:
 189         pthread_mutex_unlock(&table_lock);
 190
 191         return bo;
 192 }
 193
 194 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 195 {
 196         struct drm_gem_open req = {
 197                         .name = name,
 198         };
 199         struct fd_bo *bo;
 200
 201         pthread_mutex_lock(&table_lock);
 202
 203         /* check name table first, to see if bo is already open: */
 204         bo = lookup_bo(dev->name_table, name);
 205         if (bo)
 206                 goto out_unlock;
 207
 208         if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
 209                 ERROR_MSG("gem-open failed: %s", strerror(errno));
 210                 goto out_unlock;
 211         }
 212
 213         bo = lookup_bo(dev->handle_table, req.handle);
 214         if (bo)
 215                 goto out_unlock;
 216
 217         bo = bo_from_handle(dev, req.size, req.handle);
 218         if (bo) {
 219                 set_name(bo, name);
 220                 VG_BO_ALLOC(bo);
 221         }
 222
 223 out_unlock:
 224         pthread_mutex_unlock(&table_lock);
 225
 226         return bo;
 227 }
 228
 229 uint64_t fd_bo_get_iova(struct fd_bo *bo)
 230 {
 231         return bo->iova;
 232 }
 233
 234 struct fd_bo * fd_bo_ref(struct fd_bo *bo)
 235 {
 236         p_atomic_inc(&bo->refcnt);
 237         return bo;
 238 }
 239
 240 void fd_bo_del(struct fd_bo *bo)
 241 {
 242         struct fd_device *dev = bo->dev;
 243
 244         if (!atomic_dec_and_test(&bo->refcnt))
 245                 return;
 246
 247         pthread_mutex_lock(&table_lock);
 248
 249         if ((bo->bo_reuse == BO_CACHE) && (fd_bo_cache_free(&dev->bo_cache, bo) == 0))
 250                 goto out;
 251         if ((bo->bo_reuse == RING_CACHE) && (fd_bo_cache_free(&dev->ring_cache, bo) == 0))
 252                 goto out;
 253
 254         bo_del(bo);
 255         fd_device_del_locked(dev);
 256 out:
 257         pthread_mutex_unlock(&table_lock);
 258 }
 259
 260 /* Called under table_lock */
 261 void bo_del(struct fd_bo *bo)
 262 {
 263         VG_BO_FREE(bo);
 264
 265         if (bo->map)
 266                 os_munmap(bo->map, bo->size);
 267
 268         /* TODO probably bo's in bucket list get removed from
 269          * handle table??
 270          */
 271
 272         if (bo->handle) {
 273                 struct drm_gem_close req = {
 274                                 .handle = bo->handle,
 275                 };
 276                 _mesa_hash_table_remove_key(bo->dev->handle_table, &bo->handle);
 277                 if (bo->name)
 278                         _mesa_hash_table_remove_key(bo->dev->name_table, &bo->name);
 279                 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
 280         }
 281
 282         bo->funcs->destroy(bo);
 283 }
 284
 285 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 286 {
 287         if (!bo->name) {
 288                 struct drm_gem_flink req = {
 289                                 .handle = bo->handle,
 290                 };
 291                 int ret;
 292
 293                 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
 294                 if (ret) {
 295                         return ret;
 296                 }
 297
 298                 pthread_mutex_lock(&table_lock);
 299                 set_name(bo, req.name);
 300                 pthread_mutex_unlock(&table_lock);
 301                 bo->bo_reuse = NO_CACHE;
 302         }
 303
 304         *name = bo->name;
 305
 306         return 0;
 307 }
 308
 309 uint32_t fd_bo_handle(struct fd_bo *bo)
 310 {
 311         return bo->handle;
 312 }
 313
 314 int fd_bo_dmabuf(struct fd_bo *bo)
 315 {
 316         int ret, prime_fd;
 317
 318         ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
 319                         &prime_fd);
 320         if (ret) {
 321                 ERROR_MSG("failed to get dmabuf fd: %d", ret);
 322                 return ret;
 323         }
 324
 325         bo->bo_reuse = NO_CACHE;
 326
 327         return prime_fd;
 328 }
 329
 330 uint32_t fd_bo_size(struct fd_bo *bo)
 331 {
 332         return bo->size;
 333 }
 334
 335 void * fd_bo_map(struct fd_bo *bo)
 336 {
 337         if (!bo->map) {
 338                 uint64_t offset;
 339                 int ret;
 340
 341                 ret = bo->funcs->offset(bo, &offset);
 342                 if (ret) {
 343                         return NULL;
 344                 }
 345
 346                 bo->map = os_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 347                                 bo->dev->fd, offset);
 348                 if (bo->map == MAP_FAILED) {
 349                         ERROR_MSG("mmap failed: %s", strerror(errno));
 350                         bo->map = NULL;
 351                 }
 352         }
 353         return bo->map;
 354 }
 355
 356 /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
 357 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
 358 {
 359         return bo->funcs->cpu_prep(bo, pipe, op);
 360 }
 361
 362 void fd_bo_cpu_fini(struct fd_bo *bo)
 363 {
 364         bo->funcs->cpu_fini(bo);
 365 }