2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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:
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
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.
26 * Rickard E. (Rik) Faith <faith@valinux.com>
27 * Daryll Strauss <daryll@valinux.com>
28 * Gareth Hughes <gareth@valinux.com>
33 * Support code for dealing with the file privates associated with each
34 * open of the DRM device.
37 #include "dev/drm/drmP.h"
39 struct drm_file *drm_find_file_by_proc(struct drm_device *dev, DRM_STRUCTPROC *p)
41 uid_t uid = p->td_proc->p_ucred->cr_svuid;
42 pid_t pid = p->td_proc->p_pid;
43 struct drm_file *priv;
45 TAILQ_FOREACH(priv, &dev->files, link)
46 if (priv->pid == pid && priv->uid == uid)
51 /* drm_open_helper is called whenever a process opens /dev/drm. */
52 int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
53 struct drm_device *dev)
55 struct drm_file *priv;
60 return EBUSY; /* No exclusive opens */
63 DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m);
65 priv = drm_find_file_by_proc(dev, p);
69 priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO);
74 priv->uid = p->td_proc->p_ucred->cr_svuid;
75 priv->pid = p->td_proc->p_pid;
78 priv->ioctl_count = 0;
80 /* for compatibility root is always authenticated */
81 priv->authenticated = DRM_SUSER(p);
83 if (dev->driver->open) {
84 /* shared code returns -errno */
85 retcode = -dev->driver->open(dev, priv);
87 free(priv, DRM_MEM_FILES);
93 /* first opener automatically becomes master */
94 priv->master = TAILQ_EMPTY(&dev->files);
96 TAILQ_INSERT_TAIL(&dev->files, priv, link);
105 /* The drm_read and drm_poll are stubs to prevent spurious errors
106 * on older X Servers (4.3.0 and earlier) */
107 int drm_read(struct dev_read_args *ap)
113 drmfilt(struct knote *kn, long hint)
119 drmfilt_detach(struct knote *kn) {}
121 static struct filterops drmfiltops =
122 { FILTEROP_ISFD, NULL, drmfilt_detach, drmfilt };
125 drm_kqfilter(struct dev_kqfilter_args *ap)
127 struct knote *kn = ap->a_kn;
131 switch (kn->kn_filter) {
134 kn->kn_fop = &drmfiltops;
137 ap->a_result = EOPNOTSUPP;