1/*-
2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4 * All Rights Reserved.
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 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Rickard E. (Rik) Faith <faith@valinux.com>
27 *    Daryll Strauss <daryll@valinux.com>
28 *    Gareth Hughes <gareth@valinux.com>
29 *
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: releng/10.2/sys/dev/drm/drm_fops.c 239303 2012-08-15 16:19:39Z hselasky $");
34
35/** @file drm_fops.c
36 * Support code for dealing with the file privates associated with each
37 * open of the DRM device.
38 */
39
40#include "dev/drm/drmP.h"
41
42/* drm_open_helper is called whenever a process opens /dev/drm. */
43int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
44		    struct drm_device *dev)
45{
46	struct drm_file *priv;
47	int retcode;
48
49	if (flags & O_EXCL)
50		return EBUSY; /* No exclusive opens */
51	dev->flags = flags;
52
53	DRM_DEBUG("pid = %d, device = %s\n", DRM_CURRENTPID, devtoname(kdev));
54
55	priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO);
56	if (priv == NULL) {
57		return ENOMEM;
58	}
59
60	DRM_LOCK();
61	priv->dev		= dev;
62	priv->uid		= p->td_ucred->cr_svuid;
63	priv->pid		= p->td_proc->p_pid;
64	priv->ioctl_count 	= 0;
65
66	/* for compatibility root is always authenticated */
67	priv->authenticated	= DRM_SUSER(p);
68
69	if (dev->driver->open) {
70		/* shared code returns -errno */
71		retcode = -dev->driver->open(dev, priv);
72		if (retcode != 0) {
73			free(priv, DRM_MEM_FILES);
74			DRM_UNLOCK();
75			return retcode;
76		}
77	}
78
79	/* first opener automatically becomes master */
80	priv->master = TAILQ_EMPTY(&dev->files);
81
82	TAILQ_INSERT_TAIL(&dev->files, priv, link);
83	DRM_UNLOCK();
84	kdev->si_drv1 = dev;
85
86	retcode = devfs_set_cdevpriv(priv, drm_close);
87	if (retcode != 0)
88		drm_close(priv);
89
90	return (retcode);
91}
92
93
94/* The drm_read and drm_poll are stubs to prevent spurious errors
95 * on older X Servers (4.3.0 and earlier) */
96
97int drm_read(struct cdev *kdev, struct uio *uio, int ioflag)
98{
99	return 0;
100}
101
102int drm_poll(struct cdev *kdev, int events, DRM_STRUCTPROC *p)
103{
104	return 0;
105}
106