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 #include <xf86atomic.h>
  38
  39 #include "etnaviv_priv.h"
  40 #include "etnaviv_drmif.h"
  41
  42 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
  43
  44 drm_public struct etna_device *etna_device_new(int fd)
  45 {
  46         struct etna_device *dev = calloc(sizeof(*dev), 1);
  47
  48         if (!dev)
  49                 return NULL;
  50
  51         atomic_set(&dev->refcnt, 1);
  52         dev->fd = fd;
  53         dev->handle_table = drmHashCreate();
  54         dev->name_table = drmHashCreate();
  55         etna_bo_cache_init(&dev->bo_cache);
  56
  57         return dev;
  58 }
  59
  60 /* like etna_device_new() but creates it's own private dup() of the fd
  61  * which is close()d when the device is finalized. */
  62 drm_public struct etna_device *etna_device_new_dup(int fd)
  63 {
  64         int dup_fd = dup(fd);
  65         struct etna_device *dev = etna_device_new(dup_fd);
  66
  67         if (dev)
  68                 dev->closefd = 1;
  69         else
  70                 close(dup_fd);
  71
  72         return dev;
  73 }
  74
  75 drm_public struct etna_device *etna_device_ref(struct etna_device *dev)
  76 {
  77         atomic_inc(&dev->refcnt);
  78
  79         return dev;
  80 }
  81
  82 static void etna_device_del_impl(struct etna_device *dev)
  83 {
  84         etna_bo_cache_cleanup(&dev->bo_cache, 0);
  85         drmHashDestroy(dev->handle_table);
  86         drmHashDestroy(dev->name_table);
  87
  88         if (dev->closefd)
  89                 close(dev->fd);
  90
  91         free(dev);
  92 }
  93
  94 drm_private void etna_device_del_locked(struct etna_device *dev)
  95 {
  96         if (!atomic_dec_and_test(&dev->refcnt))
  97                 return;
  98
  99         etna_device_del_impl(dev);
 100 }
 101
 102 drm_public void etna_device_del(struct etna_device *dev)
 103 {
 104         if (!atomic_dec_and_test(&dev->refcnt))
 105                 return;
 106
 107         pthread_mutex_lock(&table_lock);
 108         etna_device_del_impl(dev);
 109         pthread_mutex_unlock(&table_lock);
 110 }
 111
 112 drm_public int etna_device_fd(struct etna_device *dev)
 113 {
 114    return dev->fd;
 115 }