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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 
etna_device_new(int fd)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. */
etna_device_new_dup(int fd)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 
etna_device_ref(struct etna_device * dev)75 struct etna_device *etna_device_ref(struct etna_device *dev)
76 {
77 	atomic_inc(&dev->refcnt);
78 
79 	return dev;
80 }
81 
etna_device_del_impl(struct etna_device * dev)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 
etna_device_del_locked(struct etna_device * dev)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 
etna_device_del(struct etna_device * dev)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 
etna_device_fd(struct etna_device * dev)112 int etna_device_fd(struct etna_device *dev)
113 {
114    return dev->fd;
115 }
116