c1833da5a9f160fc4ebfc2f948dbac4b35343ec4
[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 #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 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 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 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 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 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 int etna_device_fd(struct etna_device *dev)
113 {
114 return dev->fd;
115 }