1/*
2 * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
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 *    Rob Clark <robclark@freedesktop.org>
25 */
26
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <unistd.h>
30
31#include "freedreno_drmif.h"
32#include "freedreno_priv.h"
33
34static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
35
36static uint32_t
37u32_hash(const void *key)
38{
39	return _mesa_hash_data(key, sizeof(uint32_t));
40}
41
42static bool
43u32_equals(const void *key1, const void *key2)
44{
45	return *(const uint32_t *)key1 == *(const uint32_t *)key2;
46}
47
48
49struct fd_device * kgsl_device_new(int fd);
50struct fd_device * msm_device_new(int fd);
51
52struct fd_device * fd_device_new(int fd)
53{
54	struct fd_device *dev;
55	drmVersionPtr version;
56
57	/* figure out if we are kgsl or msm drm driver: */
58	version = drmGetVersion(fd);
59	if (!version) {
60		ERROR_MSG("cannot get version: %s", strerror(errno));
61		return NULL;
62	}
63
64	if (!strcmp(version->name, "msm")) {
65		DEBUG_MSG("msm DRM device");
66		if (version->version_major != 1) {
67			ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
68				version->version_minor, version->version_patchlevel);
69			dev = NULL;
70			goto out;
71		}
72
73		dev = msm_device_new(fd);
74		dev->version = version->version_minor;
75#if HAVE_FREEDRENO_KGSL
76	} else if (!strcmp(version->name, "kgsl")) {
77		DEBUG_MSG("kgsl DRM device");
78		dev = kgsl_device_new(fd);
79#endif
80	} else {
81		ERROR_MSG("unknown device: %s", version->name);
82		dev = NULL;
83	}
84
85out:
86	drmFreeVersion(version);
87
88	if (!dev)
89		return NULL;
90
91	p_atomic_set(&dev->refcnt, 1);
92	dev->fd = fd;
93	dev->handle_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
94	dev->name_table = _mesa_hash_table_create(NULL, u32_hash, u32_equals);
95	fd_bo_cache_init(&dev->bo_cache, FALSE);
96	fd_bo_cache_init(&dev->ring_cache, TRUE);
97
98	return dev;
99}
100
101/* like fd_device_new() but creates it's own private dup() of the fd
102 * which is close()d when the device is finalized.
103 */
104struct fd_device * fd_device_new_dup(int fd)
105{
106	int dup_fd = dup(fd);
107	struct fd_device *dev = fd_device_new(dup_fd);
108	if (dev)
109		dev->closefd = 1;
110	else
111		close(dup_fd);
112	return dev;
113}
114
115struct fd_device * fd_device_ref(struct fd_device *dev)
116{
117	p_atomic_inc(&dev->refcnt);
118	return dev;
119}
120
121static void fd_device_del_impl(struct fd_device *dev)
122{
123	int close_fd = dev->closefd ? dev->fd : -1;
124	fd_bo_cache_cleanup(&dev->bo_cache, 0);
125	_mesa_hash_table_destroy(dev->handle_table, NULL);
126	_mesa_hash_table_destroy(dev->name_table, NULL);
127	dev->funcs->destroy(dev);
128	if (close_fd >= 0)
129		close(close_fd);
130}
131
132void fd_device_del_locked(struct fd_device *dev)
133{
134	if (!atomic_dec_and_test(&dev->refcnt))
135		return;
136	fd_device_del_impl(dev);
137}
138
139void fd_device_del(struct fd_device *dev)
140{
141	if (!atomic_dec_and_test(&dev->refcnt))
142		return;
143	pthread_mutex_lock(&table_lock);
144	fd_device_del_impl(dev);
145	pthread_mutex_unlock(&table_lock);
146}
147
148int fd_device_fd(struct fd_device *dev)
149{
150	return dev->fd;
151}
152
153enum fd_version fd_device_version(struct fd_device *dev)
154{
155	return dev->version;
156}
157