src/etnaviv/drm/etnaviv_device.c

   1 /*
   2  * Copyright (C) 2014 Etnaviv Project
   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  *    Christian Gmeiner <christian.gmeiner@gmail.com>
  25  */
  26
  27 #include "util/hash_table.h"
  28
  29 #include "etnaviv_priv.h"
  30 #include "etnaviv_drmif.h"
  31
  32 static pthread_mutex_t etna_drm_table_lock = PTHREAD_MUTEX_INITIALIZER;
  33
  34 static uint32_t
  35 u32_hash(const void *key)
  36 {
  37         return _mesa_hash_data(key, sizeof(uint32_t));
  38 }
  39
  40 static bool
  41 u32_equals(const void *key1, const void *key2)
  42 {
  43         return *(const uint32_t *)key1 == *(const uint32_t *)key2;
  44 }
  45
  46 struct etna_device *etna_device_new(int fd)
  47 {
  48         struct etna_device *dev = calloc(sizeof(*dev), 1);
  49
  50         if (!dev)
  51                 return NULL;
  52
  53         p_atomic_set(&dev->refcnt, 1);
  54         dev->fd = fd;
  55         dev->handle_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
  56         dev->name_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
  57         etna_bo_cache_init(&dev->bo_cache);
  58
  59         return dev;
  60 }
  61
  62 /* like etna_device_new() but creates it's own private dup() of the fd
  63  * which is close()d when the device is finalized. */
  64 struct etna_device *etna_device_new_dup(int fd)
  65 {
  66         int dup_fd = dup(fd);
  67         struct etna_device *dev = etna_device_new(dup_fd);
  68
  69         if (dev)
  70                 dev->closefd = 1;
  71         else
  72                 close(dup_fd);
  73
  74         return dev;
  75 }
  76
  77 struct etna_device *etna_device_ref(struct etna_device *dev)
  78 {
  79         p_atomic_inc(&dev->refcnt);
  80
  81         return dev;
  82 }
  83
  84 static void etna_device_del_impl(struct etna_device *dev)
  85 {
  86         etna_bo_cache_cleanup(&dev->bo_cache, 0);
  87         _mesa_hash_table_destroy(dev->handle_table, NULL);
  88         _mesa_hash_table_destroy(dev->name_table, NULL);
  89
  90         if (dev->closefd)
  91                 close(dev->fd);
  92
  93         free(dev);
  94 }
  95
  96 void etna_device_del_locked(struct etna_device *dev)
  97 {
  98         if (!p_atomic_dec_zero(&dev->refcnt))
  99                 return;
 100
 101         etna_device_del_impl(dev);
 102 }
 103
 104 void etna_device_del(struct etna_device *dev)
 105 {
 106         if (!p_atomic_dec_zero(&dev->refcnt))
 107                 return;
 108
 109         pthread_mutex_lock(&etna_drm_table_lock);
 110         etna_device_del_impl(dev);
 111         pthread_mutex_unlock(&etna_drm_table_lock);
 112 }
 113
 114 int etna_device_fd(struct etna_device *dev)
 115 {
 116    return dev->fd;
 117 }