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 <stdlib.h>
  28 #include <linux/stddef.h>
  29 #include <linux/types.h>
  30 #include <errno.h>
  31 #include <sys/mman.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <pthread.h>
  35
  36 #include <xf86drm.h>
  37
  38 #include "etnaviv_priv.h"
  39 #include "etnaviv_drmif.h"
  40
  41 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
  42
  43 struct etna_device *etna_device_new(int fd)
  44 {
  45         struct etna_device *dev = calloc(sizeof(*dev), 1);
  46
  47         if (!dev)
  48                 return NULL;
  49
  50         p_atomic_set(&dev->refcnt, 1);
  51         dev->fd = fd;
  52         dev->handle_table = drmHashCreate();
  53         dev->name_table = drmHashCreate();
  54         etna_bo_cache_init(&dev->bo_cache);
  55
  56         return dev;
  57 }
  58
  59 /* like etna_device_new() but creates it's own private dup() of the fd
  60  * which is close()d when the device is finalized. */
  61 struct etna_device *etna_device_new_dup(int fd)
  62 {
  63         int dup_fd = dup(fd);
  64         struct etna_device *dev = etna_device_new(dup_fd);
  65
  66         if (dev)
  67                 dev->closefd = 1;
  68         else
  69                 close(dup_fd);
  70
  71         return dev;
  72 }
  73
  74 struct etna_device *etna_device_ref(struct etna_device *dev)
  75 {
  76         p_atomic_inc(&dev->refcnt);
  77
  78         return dev;
  79 }
  80
  81 static void etna_device_del_impl(struct etna_device *dev)
  82 {
  83         etna_bo_cache_cleanup(&dev->bo_cache, 0);
  84         drmHashDestroy(dev->handle_table);
  85         drmHashDestroy(dev->name_table);
  86
  87         if (dev->closefd)
  88                 close(dev->fd);
  89
  90         free(dev);
  91 }
  92
  93 void etna_device_del_locked(struct etna_device *dev)
  94 {
  95         if (!p_atomic_dec_zero(&dev->refcnt))
  96                 return;
  97
  98         etna_device_del_impl(dev);
  99 }
 100
 101 void etna_device_del(struct etna_device *dev)
 102 {
 103         if (!p_atomic_dec_zero(&dev->refcnt))
 104                 return;
 105
 106         pthread_mutex_lock(&table_lock);
 107         etna_device_del_impl(dev);
 108         pthread_mutex_unlock(&table_lock);
 109 }
 110
 111 int etna_device_fd(struct etna_device *dev)
 112 {
 113    return dev->fd;
 114 }