1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3 /*
4 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 * Rob Clark <robclark@freedesktop.org>
27 */
28
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <unistd.h>
32
33 #include "freedreno_drmif.h"
34 #include "freedreno_priv.h"
35
36 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
37
38 struct fd_device * kgsl_device_new(int fd);
39 struct fd_device * msm_device_new(int fd);
40
fd_device_new(int fd)41 struct fd_device * fd_device_new(int fd)
42 {
43 struct fd_device *dev;
44 drmVersionPtr version;
45
46 /* figure out if we are kgsl or msm drm driver: */
47 version = drmGetVersion(fd);
48 if (!version) {
49 ERROR_MSG("cannot get version: %s", strerror(errno));
50 return NULL;
51 }
52
53 if (!strcmp(version->name, "msm")) {
54 DEBUG_MSG("msm DRM device");
55 if (version->version_major != 1) {
56 ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
57 version->version_minor, version->version_patchlevel);
58 dev = NULL;
59 goto out;
60 }
61
62 dev = msm_device_new(fd);
63 dev->version = version->version_minor;
64 #if HAVE_FREEDRENO_KGSL
65 } else if (!strcmp(version->name, "kgsl")) {
66 DEBUG_MSG("kgsl DRM device");
67 dev = kgsl_device_new(fd);
68 #endif
69 } else {
70 ERROR_MSG("unknown device: %s", version->name);
71 dev = NULL;
72 }
73
74 out:
75 drmFreeVersion(version);
76
77 if (!dev)
78 return NULL;
79
80 atomic_set(&dev->refcnt, 1);
81 dev->fd = fd;
82 dev->handle_table = drmHashCreate();
83 dev->name_table = drmHashCreate();
84 fd_bo_cache_init(&dev->bo_cache, FALSE);
85
86 return dev;
87 }
88
89 /* like fd_device_new() but creates it's own private dup() of the fd
90 * which is close()d when the device is finalized.
91 */
fd_device_new_dup(int fd)92 struct fd_device * fd_device_new_dup(int fd)
93 {
94 int dup_fd = dup(fd);
95 struct fd_device *dev = fd_device_new(dup_fd);
96 if (dev)
97 dev->closefd = 1;
98 else
99 close(dup_fd);
100 return dev;
101 }
102
fd_device_ref(struct fd_device * dev)103 struct fd_device * fd_device_ref(struct fd_device *dev)
104 {
105 atomic_inc(&dev->refcnt);
106 return dev;
107 }
108
fd_device_del_impl(struct fd_device * dev)109 static void fd_device_del_impl(struct fd_device *dev)
110 {
111 int close_fd = dev->closefd ? dev->fd : -1;
112 fd_bo_cache_cleanup(&dev->bo_cache, 0);
113 drmHashDestroy(dev->handle_table);
114 drmHashDestroy(dev->name_table);
115 dev->funcs->destroy(dev);
116 if (close_fd >= 0)
117 close(close_fd);
118 }
119
fd_device_del_locked(struct fd_device * dev)120 drm_private void fd_device_del_locked(struct fd_device *dev)
121 {
122 if (!atomic_dec_and_test(&dev->refcnt))
123 return;
124 fd_device_del_impl(dev);
125 }
126
fd_device_del(struct fd_device * dev)127 void fd_device_del(struct fd_device *dev)
128 {
129 if (!atomic_dec_and_test(&dev->refcnt))
130 return;
131 pthread_mutex_lock(&table_lock);
132 fd_device_del_impl(dev);
133 pthread_mutex_unlock(&table_lock);
134 }
135
fd_device_fd(struct fd_device * dev)136 int fd_device_fd(struct fd_device *dev)
137 {
138 return dev->fd;
139 }
140
fd_device_version(struct fd_device * dev)141 enum fd_version fd_device_version(struct fd_device *dev)
142 {
143 return dev->version;
144 }
145