etnaviv: drm: Use mesa's atomic definitions
[mesa.git] / 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 }