freedreno_device.c revision d8807b2f 
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#ifdef HAVE_CONFIG_H
30# include <config.h>
31#endif
32
33#include <sys/types.h>
34#include <sys/stat.h>
35#include <unistd.h>
36
37#include "freedreno_drmif.h"
38#include "freedreno_priv.h"
39
40static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
41
42struct fd_device * kgsl_device_new(int fd);
43struct fd_device * msm_device_new(int fd);
44
45struct fd_device * fd_device_new(int fd)
46{
47	struct fd_device *dev;
48	drmVersionPtr version;
49
50	/* figure out if we are kgsl or msm drm driver: */
51	version = drmGetVersion(fd);
52	if (!version) {
53		ERROR_MSG("cannot get version: %s", strerror(errno));
54		return NULL;
55	}
56
57	if (!strcmp(version->name, "msm")) {
58		DEBUG_MSG("msm DRM device");
59		if (version->version_major != 1) {
60			ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
61				version->version_minor, version->version_patchlevel);
62			dev = NULL;
63			goto out;
64		}
65
66		dev = msm_device_new(fd);
67		dev->version = version->version_minor;
68#ifdef HAVE_FREEDRENO_KGSL
69	} else if (!strcmp(version->name, "kgsl")) {
70		DEBUG_MSG("kgsl DRM device");
71		dev = kgsl_device_new(fd);
72#endif
73	} else {
74		ERROR_MSG("unknown device: %s", version->name);
75		dev = NULL;
76	}
77
78out:
79	drmFreeVersion(version);
80
81	if (!dev)
82		return NULL;
83
84	atomic_set(&dev->refcnt, 1);
85	dev->fd = fd;
86	dev->handle_table = drmHashCreate();
87	dev->name_table = drmHashCreate();
88	fd_bo_cache_init(&dev->bo_cache, FALSE);
89
90	return dev;
91}
92
93/* like fd_device_new() but creates it's own private dup() of the fd
94 * which is close()d when the device is finalized.
95 */
96struct fd_device * fd_device_new_dup(int fd)
97{
98	int dup_fd = dup(fd);
99	struct fd_device *dev = fd_device_new(dup_fd);
100	if (dev)
101		dev->closefd = 1;
102	else
103		close(dup_fd);
104	return dev;
105}
106
107struct fd_device * fd_device_ref(struct fd_device *dev)
108{
109	atomic_inc(&dev->refcnt);
110	return dev;
111}
112
113static void fd_device_del_impl(struct fd_device *dev)
114{
115	int close_fd = dev->closefd ? dev->fd : -1;
116	fd_bo_cache_cleanup(&dev->bo_cache, 0);
117	drmHashDestroy(dev->handle_table);
118	drmHashDestroy(dev->name_table);
119	dev->funcs->destroy(dev);
120	if (close_fd >= 0)
121		close(close_fd);
122}
123
124drm_private void fd_device_del_locked(struct fd_device *dev)
125{
126	if (!atomic_dec_and_test(&dev->refcnt))
127		return;
128	fd_device_del_impl(dev);
129}
130
131void fd_device_del(struct fd_device *dev)
132{
133	if (!atomic_dec_and_test(&dev->refcnt))
134		return;
135	pthread_mutex_lock(&table_lock);
136	fd_device_del_impl(dev);
137	pthread_mutex_unlock(&table_lock);
138}
139
140int fd_device_fd(struct fd_device *dev)
141{
142	return dev->fd;
143}
144
145enum fd_version fd_device_version(struct fd_device *dev)
146{
147	return dev->version;
148}
149