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 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <stdlib.h>
32 #include <linux/stddef.h>
33 #include <linux/types.h>
34 #include <errno.h>
35 #include <sys/mman.h>
36 #include <fcntl.h>
37 #include <unistd.h>
38 #include <pthread.h>
39
40 #include <xf86drm.h>
41 #include <xf86atomic.h>
42
43 #include "etnaviv_priv.h"
44 #include "etnaviv_drmif.h"
45
46 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
47
etna_device_new(int fd)48 struct etna_device *etna_device_new(int fd)
49 {
50 struct etna_device *dev = calloc(sizeof(*dev), 1);
51
52 if (!dev)
53 return NULL;
54
55 atomic_set(&dev->refcnt, 1);
56 dev->fd = fd;
57 dev->handle_table = drmHashCreate();
58 dev->name_table = drmHashCreate();
59 etna_bo_cache_init(&dev->bo_cache);
60
61 return dev;
62 }
63
64 /* like etna_device_new() but creates it's own private dup() of the fd
65 * which is close()d when the device is finalized. */
etna_device_new_dup(int fd)66 struct etna_device *etna_device_new_dup(int fd)
67 {
68 int dup_fd = dup(fd);
69 struct etna_device *dev = etna_device_new(dup_fd);
70
71 if (dev)
72 dev->closefd = 1;
73 else
74 close(dup_fd);
75
76 return dev;
77 }
78
etna_device_ref(struct etna_device * dev)79 struct etna_device *etna_device_ref(struct etna_device *dev)
80 {
81 atomic_inc(&dev->refcnt);
82
83 return dev;
84 }
85
etna_device_del_impl(struct etna_device * dev)86 static void etna_device_del_impl(struct etna_device *dev)
87 {
88 etna_bo_cache_cleanup(&dev->bo_cache, 0);
89 drmHashDestroy(dev->handle_table);
90 drmHashDestroy(dev->name_table);
91
92 if (dev->closefd)
93 close(dev->fd);
94
95 free(dev);
96 }
97
etna_device_del_locked(struct etna_device * dev)98 drm_private void etna_device_del_locked(struct etna_device *dev)
99 {
100 if (!atomic_dec_and_test(&dev->refcnt))
101 return;
102
103 etna_device_del_impl(dev);
104 }
105
etna_device_del(struct etna_device * dev)106 void etna_device_del(struct etna_device *dev)
107 {
108 if (!atomic_dec_and_test(&dev->refcnt))
109 return;
110
111 pthread_mutex_lock(&table_lock);
112 etna_device_del_impl(dev);
113 pthread_mutex_unlock(&table_lock);
114 }
115
etna_device_fd(struct etna_device * dev)116 int etna_device_fd(struct etna_device *dev)
117 {
118 return dev->fd;
119 }
120